SU769483A1 - Device for synchronizing time scales by high-accuracy time signals - Google Patents

Description

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The invention relates to a radio system of a single time and can be used to synchronize the time scales of the receiving points of this system by the signals of its transmitting stations.g

According to the main author. St. No. 610056, a time synchronization device is known from the accurate time signals, including its serially connected reference generator, time keeper, JQ time correction block, pilot driver, radio receiver, time parameter meter, control unit and digital indicator, the second output of the control unit connected to the second jg inputs of the radio receiver, time correction block, and pilot shaping unit, and the second output of the time store is connected to the second inputs of the time pair meter meter and control unit 2o.

The proposed device is characterized in that the outputs of the time correction unit, the pilot signal generator and the digital indicator are connected to the third, fourth and fifth inputs of the control unit, respectively.

In this case, the time correction block is made in the form of a serially connected discrete phase delimiter cable, which is turned on

between the time keeper and the pilot block, and a control circuit connected to the control block.

FIG. 1 shows a block diagram of the device; in fig. 2 - time diagrams.

The device contains onorny generator 1, time keeper 2, time correction unit 3, pilot signal generator 4, radio receiver 5, time parameter meter 6, control unit 7 and digital indicator 8. The second time store output 2 is connected to the second, time meter meter inputs 6 and the control unit 7, the second output of which is connected to the second inputs of the radio receiver 5, the pilot signal generator 4 and the time correction unit 3. The second outputs of the unit 3 and the pilot signal generator 4 are connected to the third, respectively the second and fourth inputs of the control unit 7, to the fifth input of which the output of the digital indicator 8 is connected.

FIG. Figure 1b shows a block diagram of an embodiment of a time correction block 3 consisting of serially connected discrete phase encoder, atel 9 connected in connection between the time keeper 2 and the pilot signal generator 4, and the control circuit 10,

connected to the second output of the control unit 7.

The device synchronization of time scales on the signals of the exact time works as follows.

The control of the matching of the time scales for drying is determined by determining the measurement accuracy of the calibrated shift of the original signal, which is set immediately before the measurement and only for the measurement time.

For this, the time reference signals from the first output of the store 2 as a continuous pulse sequence with a repetition frequency multiple of the required dry frequencies of the radio signals in the AO program (Fig. 2, a) are used in block 3 to form a discontinuous pulse sequence. The required manipulation is determined by the low-frequency program A1 and is carried out by signals from the second output of the storage unit 2 (Fig. 2.6), (the connection of the second output of the storage unit 2 through the second output of the control unit 7 to the second input of the unit 3).

The temporal position of the signals at the output of block 3 (Fig. 2, c) can be changed using block 7. At the same time, the shift of the carrier and the envelope can be carried out quite smoothly (fine tuning mode), usually from zero to an interval equal to the repetition period pulses (Fig. 2, a), and discretely by an amount multiple of the repetition period of these pulses (coarse mode). In both cases, the exact and coarse part of the set delay is measured separately using blocks 7 and 8.

In block 4, the necessary parameters of a discontinuous pulse sequence (Fig. 2, d) are formed from the signals of block 3 and the time required for measurements for these signals (connection of the second output of block 7 to the second input of block 4) is set, for example, from ti to 4 C signal The first output of block 4, acting on the radio receiver 5, causes a radio signal at its output in the form of radio pulses (Fig. 2, d), the initial phase of the carrier frequency of which depends on the time position of the signals (Fig. 2, a or Fig. 2, d ) (individual pulses in a group), and on The initial phase (temporal position) of the envelope is from the temporal position of the signals (Fig. 2, b or Fig. 2, d) (groups of pulses). In addition, the initial phase of the radio pulses (Fig. 2, d) depends on the delay in the path of the radio receiver 5.

With a rough shift setting in block 7, only signals are shifted (Fig. 2, b). In this case, the change in the magnitude of the delay occurs discretely (Fig. 2, e - Fig. 2) and by a multiple of A t. With an accurate setting in block 7, the temporal position of both signals changes

(Fig. 2, a and Fig. 2, b), and the temporary position of the carrier and the envelope of the signals (Fig. 2, k, Fig. 2, l) is changed by the same value A / i.

To measure the coarse part of the correction, the signals from the second output of block 3 (with the repetition period of the signals of Fig. 2.6) are used, for example, the first signal from each burst of pulses (Fig. 2, d, e, h), for

accurate measurements - signals from the second output of block 4 (with a repetition period of the signals of Fig. 2, a, for example, any of the signals of Fig. 2, d, Fig. 2, k).

The current value of the block 4 set using the signal delay unit 7 is monitored using a digital indicator 8, the communication of which with the block 7 is used to develop corrective actions on the temporal position

the signals at the output of the imaging unit 4, and the connection of the unit 7 with the imaging unit 4 and the unit 3 for the necessary change in the temporal position of these signals, as shown in fig. 1, b for an embodiment of block 3 in the form of a phase shifter with its control circuit. In this embodiment, the link with block 7 is used to count the whole number of cycles when shifting the original signal, and the link of the second output of block 4, with block 7 to count the fractional part of the shift. Here, the time delay unit 3 is simplified by reducing the storage time of the amount of time offset. The measurement accuracy in the proposed device is determined only by the resolution of the digital indicator 8.

Thus, with the help of this device, the reliability of matching time scales in a full time signal transmission program is improved.

Invention Formula

Claims (2)

1. The device of synchronization of time scales by the signals of the exact time of aut. St. NO 610056, characterized in that, in order to improve the reliability of matching the correction time scales, the second outputs of the time correction block of the pilot signal generator and the output of the digital indicator are connected to the third, fourth, and fifth inputs of the control unit, respectively. 2. The device according to claim 1, characterized in that the time correction block is designed as a series-connected discrete phase shifter connected between a time keeper and a plot-signal generator, and a control circuit, connected to the control unit. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 610056, cl. G 04С 11/02, 07.05.76 (prototype).