SU527695A1 - Transmitter of the group delay time meter - Google Patents

Description

The filter 6 allocates the voltage of the first harmonic of the voltage at the output of the divider frequency 5. The division factor of the divider 2 is chosen significantly less than the coefficient of dividing the divider 5. The voltage of the first harmonic from the filter 6 is fed to the corresponding input of the frequency converter 7. At the second input of the last voltage is supplied from the output of divider 2. At the output of frequency converter 7, a sinusoidal oscillation with a frequency of

fM fl + tl

where f 1 and f J are the frequencies of the signals at the output, respectively, frequency divider 2 and filter 6.

Frequency voltage fw is used as the amplitude in the formation of amplitude modulated oscillation.

In the verification mode, the device operates as follows.

The transmitter of the meter group is directly connected to the receiver. In the source of measuring frequencies 9, a constant frequency is taken, taken as the reference frequency, after which the zero frequency of the receiving frequency group is set. Then, in source 9, one of the measuring frequencies is set up and the generator 4 is started. When the inhibit pulse arrives at the input of the circuit 3, the latter is closed. As a result, at the output of the filter 6, the signal is shifted by a time interval equal to the duration of the inhibiting pulse. The output of the frequency converter 7

the modulating voltage is shifted by an interval equal to

t-, g-

/

where t hall is the duration of the inhibiting pulse. In this case, the discreteness error is equal to

vpt

where T is the period of the following pulses at the output of the saddle generator.

Claims (1)

Invention Formula The transmitting device of the group lag time meter, comprising a reference generator, a single pulse generator, a coincidence circuit, one input of which is connected to the output. reference oscillator, and the other with the single pulse generator output, frequency divider, filter, modulator, output unit whose input is connected to the modulator output, measuring frequency source, connected to the modulator input, the output of the circuit coinciding with the input A splitter frequency, the output of which includes a filter, characterized in that, in order to increase the measurement accuracy, an additional splitter and a frequency converter are inserted into the device, the first input of the frequency converter is connected to the output of the filter, the swarm is through a dual-frequency frequency divider to the output of the reference oscillator, and the output to the second input of the module (.