CN103744010A

CN103744010A - An automatic testing system and an automatic testing method of a continuous wave radio frequency power amplifier

Info

Publication number: CN103744010A
Application number: CN201310732981.4A
Authority: CN
Inventors: 王姜铂
Original assignee: CETC 36 Research Institute
Current assignee: CETC 36 Research Institute
Priority date: 2013-12-26
Filing date: 2013-12-26
Publication date: 2014-04-23
Anticipated expiration: 2033-12-26
Also published as: CN103744010B

Abstract

The invention relates to an automatic testing system and an automatic testing method of a continuous wave radio frequency power amplifier. The method comprises contents 1 that a computer is used for via a communication bus comprehensively managing devices such as an instrument power supply, a signal source, a power meter, a spectrum analyzer, a network analyzer, a radio frequency management and interface control unit, and a power amplifier, and automatically measuring power characteristic, saturation power, gain characteristic, output stationary waves, flatness characteristic, harmonic suppression, spurious suppression, cross modulation characteristic, group delay, and AM/PM characteristics of the radio frequency power amplifier, 2 that calibration of a radio frequency input access and a radio frequency output access is achieved; 3 that the radio frequency management and interface control unit provides all radio frequency accesses, cables are not required to be detached and radio frequency ports are not required to be replaced when indexes are tested, and TTL level, 422 level, relay driving, a serial port, and a LAN bus remote control interface are provided for different power amplifying single machines, and power amplifying transmission and reception, wave band remote control, and state monitoring are achieved; 4 and that system software modular design is achieved.

Description

Continuous wave radio-frequency power amplifier Auto-Test System and automatic test approach thereof

Technical field

The invention belongs to power amplifier technical field of measurement and test, in particular to a kind of Auto-Test System and method of continuous wave radio-frequency power amplifier index.

Background technology

Continuous wave radio-frequency power amplifier is the important component part of various transmitting sets.Major function is that continuous wave rf excitation signal is amplified.The index of continuous wave radio-frequency power amplifier is various, common as voltage, electric current, efficiency, input-output characteristic, P-1dB(1dB compression point power), Psat(saturation power), gain, output standing wave, flatness, harmonic wave inhibition, spuious inhibition, intermodulation characteristic, phase place, group delay, AM/PM(amplitude modulation/phase modulation) etc.

For the test of power amplifier, adopt traditionally manual testing's method.Often need several slip-stick artists to operate many instruments simultaneously, need to expend plenty of time and energy and carry out path calibration, to power amplifier index item by item, pointwise tests, calculating, record, and changes frequently test cable port.

Because the test duration is longer, there is error in power amplifier and the high power device test result under cold and hot condition.Human factor also makes the situations such as test errors and misoperation be difficult to avoid.Not only test process is imperfect for traditional manual testing's method, and test result is inaccurate, and has strengthened the risk of damaging power amplifier, instrument and equipment.

Summary of the invention

In order to address the above problem, the invention provides and a kind ofly take computing machine as core, by Standard bus interface, instrument, equipment are carried out to concentrated controling management, utilize programmed algorithm, flow process and switch to select, continuous wave radio-frequency power amplifier Auto-Test System and method that radio frequency path is calibrated and tested.The technical scheme that the present invention takes is:

A kind of continuous wave radio-frequency power amplifier Auto-Test System, comprise computing machine, GPIB card, instrument power source, and be connected to first signal source, secondary signal source, power meter, spectrum analyzer, high power attenuator, network analyzer on Radio Frequency Management and interface control unit corresponding interface; Radio Frequency Management and control module provide Transistor-Transistor Logic level or 422 level, the driving of relay OC door, serial ports and LAN bus Remote Control Interface to be connected with tested power amplifier according to different power amplifier forms, realize changing and connect without dismounting, nothing of radio frequency testing link.

Radio Frequency Management and control module comprise three radio-frequency (RF) switch K1, K2, K3 and compositors, power circuit, control circuit; Wherein, control circuit is comprised of processor module, switch drive module, power amplifier interface driver module, GPIB communication module, and K switch 1, K2, K3 are radio-frequency (RF) coaxial switch, by switch drive module, are driven; K switch 1 is a single-pole double-throw switch (SPDT), and K switch 2, K3 are single pole multiple throw, and K switch 1 common port is as first signal source interface, and two switch terminal are switch terminal of connecting valve K2 and a distribution end of compositor respectively; Another distribution end of compositor, as the interface in secondary signal source, is synthesized a switch terminal of end connecting valve; The common port of switch connects the input test cable of tested power amplifier, and switch terminal is except above-mentioned connection, and all the other switch terminal are as lattice gauge port, expansion interface; Switch common port connects the output terminal of high power attenuator, and switch terminal is respectively as power meter, spectrum analyzer, network analyzer, expansion interface.

The series of tests method of implementing according to said system, comprising:

One, the input end differential loss calibration of carrying out under following link: network analyzer the first port---Radio Frequency Management and control module first signal source interface---K switch 1---K switch 2---input end test cable L1---network analyzer the second port; System automation and control network instrument, obtains and records the parameter in test frequency range, draws calibration curve, and the data that obtain are compensated the output radiofrequency signal of first signal source and network analyzer, and then system generates calibration file, for user, calls.

Two, the input end standing wave calibration of carrying out under following link: network analyzer the first port---Radio Frequency Management and control module first signal source interface---K switch 1---tested power amplifier of K switch 2---input end test cable L1---;

The calibration of input end standing wave comprises open circuit calibration, short circuit calibration, load calibration, and while selecting different calibration modes, tested power amplifier is chosen as corresponding part and is connected to input end test cable.

Three, the output terminal differential loss calibration of carrying out under following link: network analyzer the first port---feed-through type power meter---output terminal test cable L2---high power attenuator---K switch 3---network analyzer the second port, wherein feed-through type power meter can omit, and network analyzer the first port is directly connected with output terminal test cable L2;

System is controlled Radio Frequency Management and control module automatically, judge on link, whether each switch switches correctly, if handoff error, display alarm, system automation and control network analyser, obtain and record the parameter in test frequency range, draw calibration curve, obtain calibration data the output power of power amplifier and frequency spectrum are carried out to auto-compensation.

Four, the lattice gauge path calibration of carrying out under following link: network analyzer the first port---K switch 2---input end test cable L1---feed-through type power meter---test cable L2---high power attenuator---K switch 3---network analyzer the second port, wherein feed-through type power meter can omit, and is connected input end test cable L1 and output terminal test cable L2 are straight-through;

System is controlled Radio Frequency Management and control module automatically, judge on link, whether each switch switches correctly, if handoff error, display alarm stop testing process, correctly system automation and control network instrument, realizes the straight-through calibration of dual-port, after calibration, automatically preserve and apply calibration data, calling data file, realizes the calibration to lattice gauge path gain, phase place, group delay.

Five, the power amplifier supplied character carrying out under following link, power index test: first signal source---K switch 1---K switch 2---input end test cable L1---tested power amplifier---feed-through type power meter---output terminal test cable L2---high power attenuator---K switch 3---absorption power meter, wherein feed-through type power meter is selectable unit (SU), tested power amplifier directly can be connected with output terminal test cable L2;

A) measuring method of supplied character, input-output characteristic is:

The 1st) step: system is controlled Radio Frequency Management and control module automatically, judges on link, whether each switch switches correctly, if handoff error, display alarm stop testing process;

The 2nd) step: system apparatus for automatic control power supply, voltage, current limliting output are set, automatically read, register instrument electric power output voltage and quiescent current;

The 3rd) step: system automatic control signal source, frequency, output power output are set, system loads input end link differential loss calibration parameter automatically, demarcates power amplifier power input;

The 4th) step: system reads automatically, register instrument power work electric current and power meter data, automatically loads output terminal link differential loss calibration parameter, obtains power amplifier output power, power consumption, efficiency, power amplifier gain and power amplifier flatness accurately as calculated;

The 5th) step: judge that whether power supply is under-voltage, overcurrent, judge whether output power surpasses maximal value, calculates power amplifier gain, judge whether, lower than gain minimum value, whether to reach capacity; If meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message, otherwise continues;

The 6th) step: change successively signal source frequency, output power according to spaced points, repeat 4)～flow process 5);

The 7th) step: close first signal source, powered-down output;

The 8th) step: system is automatically tabulated, drawn;

B) method of testing of P-1dB and Psat is:

The 1st) step: input power range, coarse adjustment stepping are set, select saturated gain difference limen value, wherein input power range should cover linear zone and saturation region, and coarse adjustment stepping is 0.5～2dB, and saturated gain difference limen value is 3～5dB, for judging saturation power;

The 2nd) step: system is controlled Radio Frequency Management and control module automatically, judges on link, whether each switch switches correctly, if handoff error, display alarm stop testing process;

The 3rd) step: system apparatus for automatic control power supply, arranges voltage, current limliting output;

The 4th) step: first signal source frequency and initial output power are set, load input end link differential loss calibration parameter, demarcate power amplifier power input; The initial output power in first signal source is the poor of power amplifier input power range minimum value and this frequency input end differential loss;

The 5th) step: in input power range, with coarse adjustment stepping coarse regulation signal source from small to large output power, readout power count value, load output terminal link differential loss calibration parameter, calculate power amplifier output power, gain, read instrument power source voltage, electric current, judge whether under-voltage, overcurrent; Judge whether that output power surpasses maximal value; Judge whether lower than gain minimum value; If meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message, otherwise continues;

The 6th) step: change 0.1dB stepping fine setting power input into if gain inequality absolute value is greater than 0.8dB, finally obtain P-1dB point, error is ± 0.1dB to record power amplifier power input, output power, gain now, read instrument power source voltage, working current, calculate power consumption, efficiency index;

The 7th) step: think power amplifier saturation power so that P-3dB or P-5dB are approximate, on the basis of ordering at P-1dB in system, with 0.1dB stepping, increase power input, finally obtain saturation power point, error is ± 0.1dB, record power amplifier power input, output power, gain now, reads instrument power source voltage, working current, calculates power consumption, efficiency index;

The 8th) step: change successively signal source frequency, output power according to spaced points, repeat 4)～flow process 7);

The 9th) step: close first signal source, powered-down output;

The 10th) step: system is automatically tabulated, drawn.

Six, the harmonic wave carrying out under following link and stray wave test: first signal source---K switch 1---K switch 2---input end test cable L1---tested power amplifier---feed-through type power meter---output terminal test cable L2---high power attenuator---switch---frequency spectrograph, wherein feed-through type power meter is selectable unit (SU), tested power amplifier directly can be connected with output terminal test cable; Testing process:

Flow process 1: system is controlled Radio Frequency Management and control module automatically, judges on link, whether each switch switches correctly, if handoff error, display alarm stop testing process;

Flow process 2: system apparatus for automatic control power supply, voltage, current limliting output are set, automatically read, register instrument electric power output voltage and quiescent current;

Flow process 3: system is controlled first signal source automatically, arranges frequency, output power output, automatically loads input end link differential loss calibration parameter, demarcates power amplifier power input;

Flow process 4: judge that whether power supply is under-voltage, overcurrent, if meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message, otherwise continues;

Flow process 5: system reads, records frequency spectrograph data automatically, utilizes frequency spectrograph marking Function, finds out carrier wave, second harmonic, third harmonic, and spuious component calculates harmonic wave and suppresses and spuious inhibition data;

Flow process 6: change successively signal source frequency, output power according to spaced points, repeat flow process 3～flow process 5;

Flow process 7: close first signal source, powered-down output;

Flow process 8: system is automatically tabulated, drawn.

Seven, the third order intermodulation test of carrying out under following link: first signal source---K switch 1/ secondary signal source---compositor---K switch 2---input end test cable L1---tested power amplifier---feed-through type power meter---output terminal test cable L2---high power attenuator---K switch 3---absorption power meter/spectrum analyzer, wherein absorption power meter and spectrum analyzer are by the switching time-sharing work of K switch 3; Third order intermodulation testing process is:

Flow process 1: parameter setting, mainly comprises: double-tone spectrum intervals, output power Po, initial power input, quality of balance;

Flow process 2: signal balancing

1) only export first signal source, power is made as initial value, with 0.5dB stepping, increases input signal, makes power amplifier output reach Po-3.5dB;

2) secondary signal source radio frequency output, amplitude equates with first signal source;

3), with 0.1dB step by step modulating secondary signal source, the two-tone signal quality of balance that power amplifier is exported reaches requirement is set;

4) with 0.1dB stepping, adjust first, second signal source simultaneously, make power amplifier output reach Po;

5) judge whether quality of balance meets, if do not meet and repeat flow process 2;

Flow process 3: system reads, records frequency spectrograph data automatically, utilizes frequency spectrograph marking Function, finds out carrier wave and intermodulation component, and record data;

Flow process 4: change successively signal source frequency, output power according to spaced points, repeat flow process 2～flow process 3;

Flow process 5: close first signal source, powered-down output;

Flow process 6: system is automatically tabulated, drawn.

The phase place of eight, carrying out under following link, group delay, AM/PM test: network analyzer the first port---K switch 2---input end test cable L1---tested power amplifier---feed-through type power meter---output terminal test cable L2---high power attenuator---K switch 3---network analyzer 10 second ports; Testing procedure is as follows:

Flow process 1: load networks instrument path align mode;

Flow process 2: select test access, judge each on off state;

Flow process 3: system automation and control network instrument, obtains corresponding test parameter;

Flow process 4: close the output of lattice gauge radio frequency, powered-down output;

Flow process 5: system is automatically tabulated, drawn.

Take on above technical scheme basis, the invention has the advantages that: 1, the present invention utilizes computing machine to pass through communication bus integrated management instrument power source, signal source, power meter, spectrum analyzer, network analyzer, Radio Frequency Management and interface control unit, the instrument and equipments such as power amplifier, automatically measure radio-frequency power amplifier power supply characteristic (voltage, electric current, efficiency), input-output characteristic, frequency characteristic, P-1dB, Psat, gain characteristic, output standing wave, flatness characteristic, harmonic wave suppresses, spuious inhibition, intermodulation characteristic, phase place, group delay, the performance index such as AM/PM.2, can realize radio frequency input channel and the calibration of radio frequency output channel.3, automatic monitoring radio-frequency power amplifier state, automatically analyzes and protects fault, abnormal, power rating.4, Radio Frequency Management and interface control unit provide all whole radio frequency paths, during index test without dismounting cable and change prevention at radio-frequency port.For different power amplifier units and module, provide Transistor-Transistor Logic level, 422 level, relay driving, serial ports and LAN bus Remote Control Interface, realize power amplifier transmitting-receiving, wave band remote control and condition monitoring.5, modularized design.Realize instrument and drive file management, test parameter file management, test data figure, table, documentation are processed, and can automatically generate test report.

Accompanying drawing explanation

Fig. 1 is the structured flowchart of continuous wave radio-frequency power amplifier Auto-Test System;

Fig. 2 is Radio Frequency Management and interface control unit composition frame chart;

Fig. 3 is radio frequency link block scheme;

Fig. 4 (a) is system main-process stream, and Fig. 4 (b) is testing process.

Embodiment

Paper test macro of the present invention.

The attached structured flowchart that Figure 1 shows that power amplifier Auto-Test System.Comprise that computing machine 1, GPIB card 2, instrument power source 3, Radio Frequency Management and interface control unit 4, first signal source 5, secondary signal source 6, power meter 7, spectrum analyzer 8, high power attenuator 9, network analyzer 10 and other instrument and equipments form.

Wherein, computing machine 1 provides software platform, for user's interface operation, by gpib bus and instrument, equipment communicate, control and management.GPIB card 2 provides communication, the control interface of computing machine and each instrument and equipment.Instrument power source 3 provides voltage, electric current and current limliting, under-voltage protection for tested power amplifier 11.Radio Frequency Management and control module 4 are important component parts of power amplifier Auto-Test System, it switches and power amplifier control interface for system provides radio frequency link, the GPIB communication interface of Radio Frequency Management and control module 4 is connected with system bus, and power amplifier control interface is connected with tested power amplifier control end.

Two signal sources provide single-tone or double-tone rf excitation signal for tested power amplifier 11.High power attenuator 9 provides the power absorption of rf large-signal, can be directly used in instrument detect through the radiofrequency signal of overdamping.Power meter 7 is for the detection to power amplifier output power.Spectrum analyzer 8 is for the detection to power amplifier output spectrum and power spectrum density.Network analyzer 10 is for radio frequency link calibration, gain flatness measurement, Group Delay Measurement, phase-shift measurement, AM/PM Characteristics Detection.

Power amplifier control aspect, Radio Frequency Management and control module 4 provide Transistor-Transistor Logic level, 422 level, the driving of relay OC door, serial ports and LAN bus Remote Control Interface to be connected with power amplifier for different units or module, realize transmitting-receiving, wave band remote control and condition monitoring.Radio frequency aspect, radio frequency link is all by 4 centralized management of Radio Frequency Management and control module, during index test without dismounting cable and change prevention at radio-frequency port.

The concrete structure of Radio Frequency Management and control module 4 as shown in Figure 2.Mainly, by radio-frequency (RF) switch K1, K2, K3, compositor 41, power circuit 42, control circuit 43 form.Wherein, radio-frequency (RF) switch K1, K2, K3 are radio-frequency (RF) coaxial switch (being radio-frequency relay switch), mainly realize the switching of radio frequency path.Power circuit 42 provides power supply conversion for this equipment unit.Control circuit 43 is comprised of processor module 431, switch drive module 432, power amplifier interface driver module 433, GPIB communication module 434.Processor module 431 is mainly realized the logical process such as radio-frequency (RF) switch break-make, power amplifier control, communication, LCD demonstration, button operation; GPIB communication module 434 is outwards connected with computing machine by gpib bus, for realizing being connected between computing machine and this equipment unit; Power amplifier interface driver module 433 is outwards connected with tested power amplifier by gpib bus, power amplifier interface driver module 433 can provide Transistor-Transistor Logic level, 422 level, the driving of relay OC door, serial ports and LAN bus Remote Control Interface to drive for different power amplifier units and module, realizes power amplifier transmitting-receiving, wave band remote control and condition monitoring.Switch drive module 432 is connected with the control port of each radio-frequency (RF) switch, for driving each switch to carry out radio frequency switching, the radio frequency link of Radio Frequency Management and control module 4 specifically as shown in Figure 3:

Switch drive module 432 is connected with the control end of each radio-frequency (RF) switch, and K switch 1 is a single-pole double-throw switch (SPDT), and K switch 2, K3 are single pole multiple throw.K switch 1 common port is as first signal source 5 interfaces, and two switch terminal are distinguished a switch terminal of connecting valve K2, and a distribution end of compositor 41.Compositor 41 has two distribution end, a synthetic end, and another distribution end, as the interface in secondary signal source 6, is synthesized a switch terminal of end connecting valve K2.The common port of K switch 2 connects the input test cable L1 of tested power amplifier 11, switch terminal except above-mentioned used, also have as lattice gauge port, have as expansion interface.K switch 3 common ports connect the output terminal of high power attenuator 9, and switch terminal as the interface of power meter, spectrum analyzer, network analyzer, for connecting power meter 7, spectrum analyzer 8, network analyzer 10, also has expansion interface respectively in addition.

Because power meter 7 can have through type or absorption probe form, so in above-mentioned radio frequency link, the connection between tested power amplifier 11 and high power attenuator 9 is also to there being two kinds of forms.As shown in Figure 3, when selecting absorption power meter 7, connect on the power meter interface of K switch 3, during system works, by radio-frequency (RF) switch K3 timesharing, switch gating; When selecting feed-through type power meter 7, connect between tested power amplifier 11 output terminals and high power attenuator 9 input ends, during system works, both output reflection power and the standing wave of power amplifier can have been measured, can when measuring power amplifier output spectrum, monitor output power again, without switching output terminal radio-frequency (RF) switch.

The control inputs of single-tone or double-tone radio frequency is realized in first signal source 5, secondary signal source 6 by K switch 1 and compositor 41.

Continuous wave radio-frequency power amplifier test event generally comprises: radio frequency link calibration, for electrical testing (voltage, electric current, efficiency), input-output characteristic test, P-1dB test, Psat test, gain test, the test of output standing wave, flatness test, harmonic wave, suppress that test, spuious inhibition test, intermodulation characteristic test, phase test, group delay are tested, AM/PM tests etc.Introduce part wherein below, other test philosophy is basic identical, does not repeat.

One, radio frequency link calibration

Radio frequency link calibration is the important step of automatically testing, and for eliminating differential loss, phase error, group delay error, the standing wave error on radio frequency testing link, guarantees the accuracy of measuring.Calibration link in native system is divided into input end calibration link, output terminal calibration link and lattice gauge path calibration link, and corresponding calibration is as follows:

1) input end calibration

In order to record accurately and measure tested power amplifier input signal power and cold stationary wave characteristic, need to calibrate the differential loss of input end link and standing wave.Comprise:

A) differential loss calibration

Press shown in Fig. 3, the first port of network analyzer 10 is connected to the interface in first signal source 5 on Radio Frequency Management and control module 4, tested power amplifier input end test cable L1 links on the stripping and slicing end of K2 one end, the other end is connected to the second port of network analyzer 10, forming input end differential loss calibration link is:---------K2---input end test cable L1---the second port of network analyzer 10, utilizes lattice gauge to measure to K1 to the first port of network analyzer 10 for Radio Frequency Management and control module 4 first signal source interfaces.System is by automation and control network instrument, obtain and record the parameter in test frequency range, draw calibration curve, obtain calibration data for the output radiofrequency signal of first signal source 5 and network analyzer 10 is compensated, then system generates calibration file automatically, for user, calls.

B) standing wave calibration

Press shown in Fig. 3, the first port of network analyzer 10 is connected to the interface in the first signal source 5 of Radio Frequency Management and control module 4, tested power amplifier input end test cable L1 one end connects by power amplifier 11, the other end is connected to the port switching of K switch 2, and the input end standing wave calibration link of formation is: network analyzer 10 first ports---Radio Frequency Management and control module 4 first signal source interfaces---K1---the tested power amplifier 11 of K2---input end test cable L1---.

The calibration of input end link standing wave comprises open circuit calibration, short circuit calibration, load calibration, while selecting different calibrations, corresponding calibrating device is connected on test cable.

System automation and control network analyser 10, after carrying out the single-ended calibration of network analyzer 10 first ports, system is preserved control network analyzer 10 and calls status data file automatically, realizes the calibration to input end standing wave.

2) output terminal differential loss calibration

Output terminal calibration, for removing decay and the differential loss of radio-frequency (RF) switch, radio-frequency cable, high power attenuator on tested power amplifier output link, finally obtains power amplifier output terminal output power and spectral characteristic accurately.

Press shown in Fig. 3, the first port of network analyzer 10 is connected to optional through type power probe (one end being connected with tested power amplifier port B), the second port of network analyzer 10 is connected on the K switch 3 end lattice gauge ports of Radio Frequency Management and control module 4, formation output terminal calibration link is: the first port of network analyzer 10---optional feed-through type power meter (probe) (one end being connected with tested power amplifier port B)---output terminal test cable L2---the second port of high power attenuator 9---K3---network analyzer 10.Wherein optional feed-through type power meter can omit, and is connected the first port of network analyzer 10 and output terminal test cable L2 input end are straight-through.

Calibration operation is substantially the same, and according to link connection, system is controlled Radio Frequency Management and control module automatically, and radio frequency path is arranged to output terminal differential loss calibration link, and on automatic decision link, whether each switch switches correctly, if handoff error, display alarm.The parameter in test frequency range is obtained and recorded to system, by automation and control network instrument,, draws calibration curve, obtains calibration data for the output power of power amplifier and frequency spectrum are carried out to auto-compensation.

3) lattice gauge path calibration

The calibration of lattice gauge path is for eliminating tested power amplifier input, the gain error of output link, phase error, group delay error.

Press shown in Fig. 3, each port of network analyzer is connected on Radio Frequency Management and control module 4 corresponding interfaces, and formation lattice gauge path calibration link is: network analyzer the first port---K2---input end test cable L1---optional feed-through type power meter (probe) 7---test cable L2---high power attenuator 9---K3---network analyzer the second port.Wherein optional feed-through type power meter (probe) can omit, and is connected input end test cable L1 output terminal and test cable L2 input end are straight-through.

Calibration process operation is substantially the same, according to link connection, system will be controlled Radio Frequency Management and control module automatically, radio frequency path is arranged to lattice gauge path calibration link, on automatic decision link, whether each switch switches correctly, if handoff error, display alarm stop testing process, correctly system, by automation and control network instrument, realizes the straight-through calibration of dual-port.After calibration, system will be controlled network analyzer 10 and automatically preserve and apply calibration data, and calling data file is realized the calibration to lattice gauge path gain, phase place, group delay.

Two, power amplifier test

User, when each index of test power amplifier, must press shown in Fig. 2, and each instrument and equipment is connected on Radio Frequency Management and control module corresponding ports.By shown in Fig. 3 by input end test cable L1, tested power amplifier 11, feed-through type power meter 7, output terminal test cable L2, high power attenuator 9 is connected and be connected to Radio Frequency Management and control module corresponding interface.Absorption power meter 7 if, can omit the connection of above-mentioned feed-through type power meter 7, and tested power amplifier 11 is directly connected with output terminal test cable L2, and absorption power meter 7 is directly connected on the corresponding interface of controlling Radio Frequency Management and control module 4.

Corresponding each test link is as follows:

1) supplied character, power index test

Supplied character test comprises: operating voltage is measured, and quiescent current is measured, and dynamic current is measured, measurement of power loss, and power amplification efficiency is measured.Power index test comprises: input-output characteristic (demarcation of power amplifier power input, output power measurement, power amplifier gain measurement, power amplifier flatness are measured), and power amplifier P-1dB measures, and power amplifier Psat measures.

Radio frequency link is: first signal source 5---K1---K2---input end test cable L1---tested power amplifier 11---(feed-through type power meter 7)---output terminal test cable L2---high power attenuator 9---K3---absorption power meter 7.Wherein feed-through type power meter is selectable unit (SU), tested power amplifier 11 directly can be connected with output terminal test cable L2.

A) union measuring method of supplied character, input-output characteristic

● flow process 1: system is controlled Radio Frequency Management and control module automatically, radio frequency path is arranged to input and output radio frequency testing link, on automatic decision link, whether each switch switches correctly, if handoff error, display alarm stop testing process.

● flow process 2: system apparatus for automatic control power supply, arranges voltage, current limliting output.System will read automatically, register instrument electric power output voltage and quiescent current.

● flow process 3: system automatic control signal source 5, arranges frequency, output power output.System will load input end link differential loss calibration parameter automatically, demarcate power amplifier power input.

● flow process 4: system reads automatically, register instrument power work electric current and power meter data.System will load output terminal link differential loss calibration parameter automatically, obtain as calculated power amplifier output power, power consumption, efficiency, power amplifier gain and power amplifier flatness accurately.

● flow process 5: judge whether that whether power supply is under-voltage, overcurrent; Judge whether that output power surpasses maximal value; The gain of calculating power amplifier, judges whether, lower than gain minimum value, whether to reach capacity.If meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message.Otherwise continue.

● flow process 6: change successively signal source frequency, output power according to spaced points, repeat flow process 4～flow process 5.

● flow process 7: close first signal source, powered-down output.

● flow process 8: system is automatically tabulated, drawn.

B) method of testing of P-1dB and Psat

● flow process 1: input power range, coarse adjustment stepping are set, select saturated gain difference limen value.Wherein input power range should cover linear zone and saturation region.Coarse adjustment stepping is 0.5～2dB.Saturated gain difference limen value is 3～5dB, for judging saturation power.

● flow process 2: system is controlled Radio Frequency Management and control module automatically, radio frequency path is arranged to input and output radio frequency testing link, on automatic decision link, whether each switch switches correctly, if handoff error, display alarm stop testing process.

● flow process 3: system apparatus for automatic control power supply, arranges voltage, current limliting output.

● flow process 4: first signal source frequency and initial output power are set, load input end link differential loss calibration parameter, demarcate power amplifier power input.The initial output power in first signal source is the poor of power amplifier input power range minimum value and this frequency input end differential loss.

● flow process 5: in input power range, with coarse adjustment stepping coarse regulation signal source from small to large output power, readout power count value, load output terminal link differential loss calibration parameter, calculate power amplifier output power, gain, read instrument power source voltage, electric current, judge whether under-voltage, overcurrent; Judge whether that output power surpasses maximal value; Judge whether lower than gain minimum value.If meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message.Otherwise continue.

● flow process 6: change 0.1dB stepping fine setting power input into if gain inequality absolute value is greater than 0.8dB, finally obtain P-1dB point, error is ± 0.1dB to record power amplifier power input, output power, gain now, read instrument power source voltage, working current, calculate power consumption, efficiency index.

● flow process 7: often think power amplifier saturation power so that P-3dB or P-5dB are approximate in engineering.On the basis of ordering at P-1dB in system, with 0.1dB stepping, increase power input, finally obtain saturation power point, error is ± 0.1dB, record power amplifier power input, output power, gain now, reads instrument power source voltage, working current, calculates power consumption, efficiency index.

● flow process 8: change successively signal source frequency, output power according to spaced points, repeat flow process 4～flow process 7.

● flow process 9: close first signal source, powered-down output.

● flow process 10: system is automatically tabulated, drawn.

2) frequency spectrum dependence test

Frequency spectrum dependence test comprises: the harmonic wave test of power amplifier, spuious test, third order intermodulation test.

Wherein the loose radio frequency link of measuring of harmonic wave and clutter is: first signal source 5---K1---K2---input end test cable L1---tested power amplifier 11---feed-through type power meter 7---output terminal test cable L2---high power attenuator 9---K3---frequency spectrograph 8, wherein feed-through type power meter 7 is selectable unit (SU), tested power amplifier 11 directly can be connected with output terminal test cable L2, the substitute is at K3 end and connect absorption power meter.

Harmonic wave, spuious method of testing:

The carrier wave of system automatic acquisition power amplifier, second harmonic, third harmonic, harmonic wave suppress, spuious, spuious inhibition, and process is as follows:

● flow process 1: system is controlled Radio Frequency Management and control module automatically, radio frequency path is arranged to harmonic wave, clutter test link, on automatic decision link, whether each switch switches correctly, if handoff error, display alarm stop testing process.

● flow process 3: system is controlled first signal source 5 automatically, arranges frequency, output power output.System will load input end link differential loss calibration parameter automatically, demarcate power amplifier power input.

● flow process 4: judge whether that whether power supply is under-voltage, overcurrent.If meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message.Otherwise continue.

● flow process 5: system reads, records frequency spectrograph data automatically.Utilize frequency spectrograph mark (Marker) function, find out carrier wave, second harmonic, third harmonic, spuious component, calculates harmonic wave and suppresses and spuious inhibition data.

● flow process 6: change successively signal source frequency, output power according to spaced points, repeat flow process 3～flow process 5.

● flow process 7: close first signal source, powered-down output.

● flow process 8: system is automatically tabulated, drawn.

The radio frequency link of third order intermodulation test is: (first signal source 5---K1)/secondary signal source 6---compositor 41---K2---input end test cable L1---tested power amplifier 11---feed-through type power meter 7---output terminal test cable L2---high power attenuator 9---K3---absorption power meter 7/ spectrum analyzer 8.Wherein absorption power meter 7 passes through the switching time-sharing work of K switch 3 with spectrum analyzer 8.

The method of testing of third order intermodulation:

● flow process 1: parameter setting.Mainly comprise: double-tone spectrum intervals, output power Po, initial power input, quality of balance (two-tone signal amplitude difference maximal value) etc.

● flow process 2: signal balancing process

1) only export first signal source, power is made as initial value.With 0.5dB stepping, increase input signal, make power amplifier output reach Po-3.5dB;

2) secondary signal source radio frequency output, amplitude equates with first signal source

4) with 0.1dB stepping, adjust first, second signal source simultaneously, make power amplifier output reach Po.

5) judge whether quality of balance meets, if do not meet and repeat flow process 2.

● flow process 3: system reads, records frequency spectrograph data automatically.Utilize frequency spectrograph mark (Marker) function, find out carrier wave and intermodulation component, and record data.

● flow process 4: change successively signal source frequency, output power according to spaced points, repeat flow process 2～flow process 3.

● flow process 5: close first signal source, powered-down output.

Flow process 6: system is automatically tabulated, drawn.

3) phase place, group delay, AM/PM

Radio frequency link is: network analyzer 10 first ports---K2---input end test cable L1---tested power amplifier 11---optional feed-through type power meter (probe) 7---output terminal test cable L2---high power attenuator 9---K3---network analyzer 10 second ports.Wherein, optional feed-through type power meter 7 can omit, and is connected tested power amplifier 11 and output terminal test cable L2 input end are straight-through.

Testing procedure is as follows:

● flow process 1: load networks instrument path align mode.

● flow process 2: select test access, judge each on off state.

● flow process 3: system automation and control network instrument, obtains corresponding test parameter.

● flow process 4: close the output of lattice gauge radio frequency, powered-down output.

● flow process 5: system is automatically tabulated, drawn.

4) input standing wave test

Testing procedure is as follows:

● flow process 1: load input end standing wave align mode.

● flow process 2: select test access, judge each on off state.

● flow process 3: system automation and control network instrument, obtains standing wave parameter.

● flow process 5: system is automatically tabulated, drawn.

5) expansion link

Radio frequency link is: K2 holds expansion interface, and------------------high power attenuator 9---K3---K2 holds expansion interface to output terminal test cable L2 to feed-through type power meter 7 to tested power amplifier 11 to input end test cable L1 to K2.Expansion link is mainly used in test function expansion.Wherein, K2 end expansion interface can be used for other driver input, also can be used for radio-frequency input signals isolation.K3 end expansion interface can connect other testing apparatus, as oscillograph, acoustic meter etc., and for testing envelope waveform, time sequence information, the indexs such as noise figure.

In sum, system main-process stream can be as accompanying drawing 4(a) as shown in.Mainly comprise following flow process:

A) the test preparatory stage.User need to guarantee that cable reliably connects, and opens instrument, device power supply (DPS), guarantees that signal source, lattice gauge radiofrequency signal close.

B) open testing system software.After software is opened, system loads test parameter last time automatically.

C) parameter setting.Comprise: frequency range, power, electric current, voltage, calibration parameter, test interval, each threshold value etc.Can function items need to be set according to test, as function final election, method of testing, protection mechanism, frequency band filter, power amplifier interface, robot linkage function etc.

D) instrument connects.User can load instrument and drive file, and manually connects instrument.Connection status is visual, and corresponding test function can be enumerated and final election.

E) parametric calibration.System provides calibration guide, and radio frequency link is carried out to manual calibration.In the constant situation of test condition, only need primary calibration.System generates calibration parameter curve and file automatically, can preserve, reads and show.

F) radio frequency connects.User, after calibration flow process, need connect and guarantee that radio frequency path is unimpeded according to accompanying drawing 2, Fig. 3.

G) monitor and test.User can operate each testing process item respectively.In test process; system is according to selected protection mechanism and threshold value automatic monitoring power amplifier state, and the important informations such as electric current, voltage, frequency range, power, gain, judge power amplifier fault or abnormality; automatically system and power amplifier are protected, test process can emergent stopping.

H) file output.System provides complete test report.Comprise the important informations such as data form, curvilinear figure, test duration, tester, text description.

I) finish.The automatic shutdown signal of system source, lattice gauge, power supply output in process ends.Automatically generate Parameter File, for inheriting next time and loading.

Test item can be summarized as accompanying drawing 4(b) shown in FB(flow block).

A) parameter setting.User can need to arrange test item in detail according to test, as frequency set, power input collection, thresholding detailed rules and regulations etc.Set ordered series of numbers auto-sequencing.

B) lower electricity (being power-off).Before loop test, first system guarantees that power amplifier is in " lower electricity " state." lower electricity " process is automatically observed and is first closed the principle that RF device closes power supply again.

C) (i.e. energising) powers on.The process that " powers on " is observed the principle that first switch power supply is opened radio frequency more automatically.

D) loop test.System adopts the algorithm flow of optimizing to carry out point set loop test and record to power amplifier index.In test process, embedded protection mechanism, when being judged as fault, abnormal or emergent stopping, system stops testing process automatically.

E) finish.System after testing process finishes, automatically shutdown signal source, lattice gauge, powered-down output.Guarantee test safety, reduce power amplifier test heat, save the energy.

Auto-Test System workflow for example

Course: certain continuous wave power amplifier, power supply (voltage, electric current, efficiency), the calibration of input-output characteristic, auto test flow.

Suppose: power amplifier frequency of operation: 100～200MHz, when power input 0dBm, output power is greater than 100W, maximum power output 120W, power supply 28V(± 10%), working current is less than 10A, and power amplifier transmitting-receiving TTL controls (logical one is transmitting, and 0 for receiving).

By following flow process, automatically test:

1) the test preparatory stage.User need to guarantee that cable reliably connects, and opens instrument, device power supply (DPS), guarantees that signal source, lattice gauge radiofrequency signal close.

2) on computer platform, open testing system software.After software is opened, system automatically loads and tested whole parameters and Parameter File last time.If user is provided with " start connect all appts " option, the system all appts that will certainly be dynamically connected, cut-off signal source, the output of lattice gauge radio frequency and power supply output, when having instrument connection failure, point out automatically.

Parameter comprises: working frequency range, peak power output (thresholding), input voltage, under-voltage threshold, maximum operating currenbt (thresholding), least gain (thresholding), test interval, function final election, method of testing, protection mechanism, power amplifier interface, frequency band filter etc.

Parameter File comprises: the driving file of each instrument, each calibration file etc.

3) in software platform parameter, arrange.The definition of parameter is same as described above, if desired arranges by the following method:

● working frequency range: 100～200MHz

● peak power output (thresholding): 120W

● input voltage: 28V

● under-voltage threshold: 25V

● maximum operating currenbt (thresholding): 10A

● least gain (thresholding): 47dB

● the test interval: 200mS

● function final election: for electrical testing, input-output characteristic

● protection mechanism final election: under-voltage, overcurrent, peak power output, least gain, saturated protection

● power amplifier interface: TTL, logical one are transmitting

● press and put " parameter is determined " button

4) at software platform, connect instrument

If desired, operation by the following method:

● connect instrument power source

■ loads instrument power drives file, system automatic-prompting load document state

■ arranges instrument power source GPIB address

■ presses and puts " connection instrument power source " button

■ is after successful connection, and corresponding green indicating lamp is opened, and system is automatically to power reset, state zero clearing and close output

● connect first signal source

■ loads first signal source and drives file, system automatic-prompting load document state

■ arranges GPIB address, first signal source

■ presses and puts " connecting first signal source " button

■ is after successful connection, and corresponding green indicating lamp is opened, and system is closed radio frequency output to the reset of first signal source, state zero clearing automatically

● connect power meter

■ loads power meter and drives file, system automatic-prompting load document state

■ arranges power meter GPIB address

■ presses and puts " connection power meter " button

■ is after successful connection, and corresponding green indicating lamp is opened, and system is automatically to power meter reset, state zero clearing

● connect Radio Frequency Management and control module

■ loading equipemtn drives file, system automatic-prompting load document state

■ arranges equipment GPIB address

■ presses and puts " connecting Radio Frequency Management and control module " button

■ is after successful connection, and corresponding green indicating lamp is opened, and system is automatically to this device reset, state zero clearing

● interconnection network instrument

■ load networks instrument drives file, system automatic-prompting load document state

■ arranges lattice gauge GPIB address

■ presses and puts " interconnection network instrument " button

The effect that loads instrument, device drives file is in order to meet the needs of compatible different instrument, equipment.When same quasi-instrument, equipment need to be changed and when communication instruction is inconsistent, can load the driving file of corresponding instrument, equipment.

When above-mentioned instrument, equipment connection success, function gathers indication item: chain calibration, for the test of electrical testing, input-output characteristic, P-1dB/Psat test, flatness test, phase shift test, AM/PM test, group delay test, input main ripple test etc. and be labeled, representative can be carried out above functional test.

5) parametric calibration

Accurate to the test of this course, need to calibrate input end link differential loss, output terminal link differential loss.When there is this chain calibration file in system, load calibration file, can skip corresponding step.When needs are calibrated, operation following steps:

A) input end link differential loss calibration

● on software platform, open the input end link differential loss calibration guide page.

● calibration frequency range is set, and system is calibrated frequency range by automatic system and whether is comprised test frequency range.For this example, be set to: 80～120MHz, after setting, clicks " next step ".

● according to guide prompting, manually connect radio-frequency cable: shown in Fig. 3, lattice gauge the first port is connected to first signal source interface, lattice gauge the second port is connected to input end test cable L1(A end).After connecting, click " next step ".

● system, by automatic control linkage Radio Frequency Management and control module, is arranged to input end differential loss calibration link by radio frequency path, and on automatic decision link, whether each switch switches correctly, if handoff error, display alarm.

● system gets parms automation and control network instrument, obtains calibration data, draws calibration curve.

● user can preserve and read calibration data file, during file reading, automatically draws calibration curve, obtains calibration data for the output radiofrequency signal of first signal source 5 and network analyzer 10 is compensated.

● system generates calibration file automatically, for user, calls.

B) input end link standing wave calibration

● calibration frequency range is set, and system is calibrated frequency range by automatic system and whether is comprised test frequency range.After setting, click " next step ".

● system, by automatic control linkage Radio Frequency Management and control module, is arranged to input end standing wave calibration link by radio frequency path, and on automatic decision link, whether each switch switches correctly, if handoff error, display alarm.

● open circuit (open) calibration.According to guide prompting, shown in Fig. 3, lattice gauge the first port is connected to first signal source interface, the open circuit calibrating device of network analyzer 10 is connected to input end test cable L1.After connecting, click " next step ".System, by automation and control network analyser 10, is carried out the single-ended open circuit calibration of network analyzer 10 first ports, and after calibration, system will be controlled network analyzer 10 and automatically preserve and apply calibration data.

● short circuit (short) calibration.Equally in a manner described, lattice gauge the first port is connected to first signal source interface, the short circuit calibrating device of network analyzer 10 is connected to input end test cable L1.After connecting, click " next step ".System, by automation and control network analyser 10, is carried out the single-ended open circuit calibration of network analyzer 10 first ports, and after calibration, system will be controlled network analyzer 10 and automatically preserve and apply calibration data.

● load (load) calibration.Equally in a manner described, lattice gauge the first port is connected to first signal source interface, the load calibrating device of network analyzer 10 is connected to input end test cable L1.After connecting, click " next step ".System, by automation and control network analyser 10, is carried out the single-ended open circuit calibration of network analyzer 10 first ports, and after calibration, system will be controlled network analyzer 10 and automatically preserve and apply calibration data.

● the preservation of network analyzer 10 states.After open circuit, short circuit, load calibration, user can preserve network analyzer 10 states by software interface.Status data file is stored in network analyzer 10 inside, and system, by controlling network analyzer 10, is called status data file, realizes the calibration to input end standing wave.

C) output terminal link differential loss calibration

● on software platform, open the output terminal link differential loss calibration guide page.

● according to guide, point out, manually connect radio-frequency cable: press shown in Fig. 3, lattice gauge port one is connected to optional feed-through type power meter probe (if do not apply these parts, directly connect output test cable), network analyzer the second port is connected on lattice gauge second port of Radio Frequency Management and control module.After connecting, click " next step ".

● system will be controlled Radio Frequency Management and control module automatically, and radio frequency path is arranged to output terminal differential loss calibration link, and on automatic decision link, whether each switch switches correctly, if handoff error, display alarm.

● system gets parms automation and control network instrument, obtains calibration data, draws calibration curve.Obtain calibration data for the output power of power amplifier and frequency spectrum are carried out to auto-compensation.System generates calibration file automatically, for user, calls.

6) radio frequency connects

Need connect and guarantee radio frequency path according to accompanying drawing 2, Fig. 3.

7) monitor and test

By following flow operations

● on software platform, open the automatic test page of input and output

● frequency interval point, power input spaced points, input power range are set.For this example, frequency interval point is set: 11, power input spaced points 11, input power range :-10～0dBm

● start to measure

System will be carried out following flow process automatically

◆ flow process 1: system is controlled Radio Frequency Management and control module automatically, radio frequency path is arranged to corresponding radio frequency link, on automatic decision link, whether each switch switches correctly, if handoff error, display alarm.

◆ flow process 2: system apparatus for automatic control power supply, arranges voltage, current limliting output.

◆ flow process 3: system automatic control signal source 1, arranges frequency, output power output.System will load input end link differential loss calibration parameter automatically, and power amplifier power input is accurately set.

◆ flow process 4: according to the setting in test interval, wait for 200mS.

◆ flow process 5: system reads automatically, recording voltage, electric current, power meter data.System will load output terminal link differential loss calibration parameter automatically, obtain as calculated power amplifier output power accurately.

◆ flow process 6: judge whether that whether power supply is under-voltage, overcurrent; Judge whether that output power surpasses maximal value; The gain of calculating power amplifier, judges whether, lower than gain minimum value, whether to reach capacity.If meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message.Otherwise continue.

◆ flow process 7: change successively signal source frequency, output power according to spaced points, repeat flow process 4～flow process 7

◆ flow process 8: close first signal source, powered-down output.

◆ flow process 9: system is automatically tabulated, drawn

8) file output.System provides complete test report.Comprise the important informations such as data form, curvilinear figure, test duration, tester, text description.

9) finish.The automatic shutdown signal of system source, lattice gauge, power supply output in process ends.Automatically generate Parameter File, for inheriting next time and loading.

Important indicator wherein:

1) method of testing of P-1dB and saturation power is as follows:

A) power bracket, coarse adjustment stepping are set, select saturated gain difference limen value.Wherein input power range should cover linear zone and saturation region.Coarse adjustment stepping is 0.5～2dB.Saturated gain difference limen value is 3～5dB, for judging saturation power.

B) output power of coarse regulation signal source from small to large, readout power meter forward power numerical value, calculates power amplifier gain, if gain inequality absolute value is greater than 3.1dB or is less than 2.9dB, change 0.1dB stepping fine setting power input into, finally obtain P-1dB point, error is ± 0.1dB.

C) in engineering, often so that P-3dB or P-5dB are approximate, think power amplifier saturation power.On the basis of ordering at P-1dB in system, with 0.1dB stepping, increase power input, finally obtain saturation power point.

D) when obtaining Psat point or power input, reach in limited time, test process stops automatically, automatically shutdown signal source.

2) method of testing of third order intermodulation component is as follows:

A) parameter setting.Mainly comprise: double-tone spectrum intervals, output power Po, initial power input, quality of balance (two-tone signal amplitude difference maximal value) etc.

B) signal balancing process

I) only export first signal source, power is made as initial value.With 0.5dB stepping, increase input signal, make power amplifier output reach Po-3.5dB.

II) secondary signal source radio frequency output, amplitude equates with first signal source.

III), with 0.1dB step by step modulating secondary signal source, the two-tone signal quality of balance that power amplifier is exported reaches requirement is set.

IV) with 0.1dB stepping, adjust first, second signal source simultaneously, make power amplifier output reach Po.

V) judge whether quality of balance meets, if do not meet, repeat (III)～(V) step.

C) computing machine directly reads spectrum analyzer data, controls and read frequency spectrograph mark (Marker), obtains carrier wave and intermodulation component, calculates index of correlation.

Systems approach according to the present invention has realized the automatic test of continuous wave radio-frequency power amplifier, has both guaranteed test result accuracy, has improved testing efficiency, has saved manpower and materials cost; Owing to having added protection mechanism in test process, make test process safer simultaneously, reduced the risk of damaging power amplifier and instrument and equipment.

Claims

1. a continuous wave radio-frequency power amplifier Auto-Test System, it is characterized in that: comprise computing machine (1), GPIB card (2), instrument power source (3), and be connected to first signal source (5), secondary signal source (6), power meter (7), spectrum analyzer (8), high power attenuator (9), network analyzer (10) on Radio Frequency Management and interface control unit (4) corresponding interface; Described Radio Frequency Management and control module (4) provide Transistor-Transistor Logic level or 422 level, the driving of relay OC door, serial ports and LAN bus Remote Control Interface to be connected with tested power amplifier (11) according to different power amplifier forms, realize changing and connect without dismounting, nothing of radio frequency testing link.

2. continuous wave radio-frequency power amplifier Auto-Test System according to claim 1, is characterized in that: Radio Frequency Management and control module (4) comprise three radio-frequency (RF) switch (K1, K2, K3) and compositor (41), power module (42), control module (43); Wherein, control module (43) is comprised of processor module, switch drive module, power amplifier interface driver module, GPIB communication module, and switch (K1, K2, K3) is radio-frequency (RF) coaxial switch, by switch drive module, is driven; Switch (K1) is a single-pole double-throw switch (SPDT), switch (K2, K3) is single pole multiple throw, switch (K1) common port is as first signal source (5) interface, and two switch terminal are switch terminal of connecting valves (K2) and a distribution end of compositor (41) respectively; Another distribution end of compositor (41), as the interface of secondary signal source (6), is synthesized a switch terminal of end connecting valve (K2); The common port of switch (K2) connects the input test cable of tested power amplifier (11), and switch terminal is except above-mentioned connection, and all the other switch terminal are as lattice gauge port, expansion interface; Switch (K3) common port connects the output terminal of high power attenuator (9), and switch terminal is respectively as power meter, spectrum analyzer, network analyzer, expansion interface.

3. the method for testing of System Implementation according to claim 2, comprising:

The input end differential loss calibration of carrying out under following link: network analyzer (10) first ports---Radio Frequency Management and control module (4) first signal source interface---switch (K1)---switch (K2)---input end test cable (L1)---network analyzer (10) second ports; System automation and control network instrument, obtain and record the parameter in test frequency range, draw calibration curve, the data that obtain are compensated the output radiofrequency signal of first signal source (5) and network analyzer (10), then system generates calibration file, for user, calls.

4. the method for testing of System Implementation according to claim 2, comprising:

The input end standing wave calibration of carrying out under following link: network analyzer (10) first ports---Radio Frequency Management and control module (4) first signal source interface---switch (K1)---switch (K2)---input end test cable (L1)---tested power amplifier (11);

The calibration of input end standing wave comprises open circuit calibration, short circuit calibration, load calibration, and while selecting different calibration modes, tested power amplifier (11) is chosen as corresponding part and is connected to input end test cable (L1).

5. the method for testing of System Implementation according to claim 2, comprising:

The output terminal differential loss calibration of carrying out under following link: network analyzer (10) first ports---feed-through type power meter (7)---output terminal test cable (L2)---high power attenuator (9)---switch (K3)---network analyzer (10) second ports, wherein feed-through type power meter (7) can omit, and network analyzer (10) first ports are directly connected with output terminal test cable (L2);

6. the method for testing of System Implementation according to claim 2, comprising:

The lattice gauge path calibration of carrying out under following link: network analyzer (10) first ports---switch (K2)---input end test cable (L1)---feed-through type power meter (7)---test cable (L2)---high power attenuator (9)---switch (K3)---network analyzer the second port, wherein feed-through type power meter (7) can omit, and is connected input end test cable (L1) and output terminal test cable (L2) are straight-through;

7. the method for testing of System Implementation according to claim 2, comprising:

The power amplifier supplied character carrying out under following link, power index test: first signal source (5)---switch (K1)---switch (K2)---input end test cable (L1)---tested power amplifier (11)---feed-through type power meter (7)---output terminal test cable (L2)---high power attenuator (9)---switch (K3)---absorption power meter (7), wherein feed-through type power meter (7) is selectable unit (SU), tested power amplifier (11) directly can be connected with output terminal test cable (L2);

A) union measuring method of supplied character, input-output characteristic:

Flow process 3: system automatic control signal source (5), frequency, output power output are set, system loads input end link differential loss calibration parameter automatically, demarcates power amplifier power input;

Flow process 4: system reads automatically, register instrument power work electric current and power meter data, automatically loads output terminal link differential loss calibration parameter, obtains power amplifier output power, power consumption, efficiency, power amplifier gain and power amplifier flatness accurately as calculated;

Flow process 5: judge that whether power supply is under-voltage, overcurrent, judge whether output power surpasses maximal value, calculates power amplifier gain, judge whether, lower than gain minimum value, whether to reach capacity; If meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message, otherwise continues;

Flow process 6: change successively signal source frequency, output power according to spaced points, repeat flow process 4～flow process 5;

Flow process 7: close first signal source, powered-down output;

Flow process 8: system is automatically tabulated, drawn;

B) method of testing of P-1dB and Psat

Flow process 1: input power range, coarse adjustment stepping are set, select saturated gain difference limen value, wherein input power range should cover linear zone and saturation region, and coarse adjustment stepping is 0.5～2dB, and saturated gain difference limen value is 3～5dB, for judging saturation power;

Flow process 2: system is controlled Radio Frequency Management and control module automatically, judges on link, whether each switch switches correctly, if handoff error, display alarm stop testing process;

Flow process 3: system apparatus for automatic control power supply, arranges voltage, current limliting output;

Flow process 4: first signal source frequency and initial output power are set, load input end link differential loss calibration parameter, demarcate power amplifier power input; The initial output power in first signal source is the poor of power amplifier input power range minimum value and this frequency input end differential loss;

Flow process 5: in input power range, with coarse adjustment stepping coarse regulation signal source from small to large output power, readout power count value, load output terminal link differential loss calibration parameter, calculate power amplifier output power, gain, read instrument power source voltage, electric current, judge whether under-voltage, overcurrent; Judge whether that output power surpasses maximal value; Judge whether lower than gain minimum value; If meet above-mentioned condition, stop testing process, close first signal source, powered-down output, provides warning message, otherwise continues;

Flow process 6: change 0.1dB stepping fine setting power input into if gain inequality absolute value is greater than 0.8dB, finally obtain P-1dB point, error is ± 0.1dB to record power amplifier power input, output power, gain now, read instrument power source voltage, working current, calculate power consumption, efficiency index;

Flow process 7: think power amplifier saturation power so that P-3dB or P-5dB are approximate, on the basis of ordering at P-1dB in system, with 0.1dB stepping, increase power input, finally obtain saturation power point, error is ± 0.1dB, record power amplifier power input, output power, gain now, reads instrument power source voltage, working current, calculates power consumption, efficiency index;

Flow process 8: change successively signal source frequency, output power according to spaced points, repeat flow process 4～flow process 7;

Flow process 9: close first signal source, powered-down output;

Flow process 10: system is automatically tabulated, drawn.

8. the method for testing of System Implementation according to claim 2, comprising:

The harmonic wave carrying out under following link and stray wave test: first signal source (5)---switch (K1)---switch (K2)---input end test cable (L1)---tested power amplifier (11)---feed-through type power meter (7)---output terminal test cable (L2)---high power attenuator (9)---switch (K3)---frequency spectrograph (8), wherein feed-through type power meter (7) is selectable unit (SU), tested power amplifier (11) directly can be connected with output terminal test cable (L2); Testing process:

Flow process 7: close first signal source, powered-down output;

Flow process 8: system is automatically tabulated, drawn.

9. the method for testing of System Implementation according to claim 2, comprising:

The third order intermodulation test of carrying out under following link: first signal source (5)---switch (K1)/secondary signal source (6)---compositor (41)---switch (K2)---input end test cable (L1)---tested power amplifier (11)---feed-through type power meter (7)---output terminal test cable (L2)---high power attenuator (9)---switch (K3)---absorption power meter (7)/spectrum analyzer (8), wherein absorption power meter (7) passes through the switching time-sharing work of switch (K3) with spectrum analyzer (8); Third order intermodulation testing process:

Flow process 1: parameter setting, mainly comprises: double-tone spectrum intervals, output power Po, initial

Power input, quality of balance;

Flow process 2: signal balancing

Flow process 5: close first signal source, powered-down output;

Flow process 6: system is automatically tabulated, drawn.

10. the method for testing of System Implementation according to claim 2, comprising:

The phase place of carrying out under following link, group delay, AM/PM test: network analyzer (10) first ports---switch (K2)---input end test cable (L1)---tested power amplifier (11)---feed-through type power meter (7)---output terminal test cable (L2)---high power attenuator (9)---switch (K3)---network analyzer (10) second ports; Testing procedure is as follows:

Flow process 1: load networks instrument path align mode;

Flow process 2: select test access, judge each on off state;

Flow process 5: system is automatically tabulated, drawn.