SU432409A1 - DIGITAL MEASURING CARRIER OF RADIO IMPULSE SIGNALS - Google Patents

Description

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This invention relates to electrical measuring technology.

A well-known digital meter carrying the frequency of radio and pulse signals containing a high-frequency peak detector connected to the pulse input of the second time selector, a potential meter input connected to the potential input of the first time selector and the first output of the driver of the time pulse of the measurement pulse the output is connected to the input of a period counter, the output of which through the first accumulator and the first adder of the cycle is connected to the first input: M of the common indicator, the second input connected to the first output The second output is connected to the first input of the second cycle adder, the output connected to the first input of the time measuring pulse generator, the second input through the second storage device with the first output of the scale mark counter, and the third input with the second output. a scale mark counter, the input of which is connected via a first selector to a reference frequency generator, is characterized by reduced accuracy.

The proposed isomer differs from the known ones in that it is equipped with a video detector and a synchro / ronized driver with reference front and rear impulses

video pulse fronts, the outputs of which are connected to the second and third inputs and the former of the temporary measuring pulse, the first inputs through the video detector are with the input terminal, and the second inputs are with the reference frequency generator.

Such an embodiment of the device improves its accuracy.

The block diagram of the described meter is shown in the drawing.

The device consists of: a high-frequency pick-up detector (abostritel) /, video detector 2, drivers 3, 4 synchronized with the reference front and rear edges of the video pulse, -.scale generator 5 reference frequency, first time selector 6, counter of scale marks 7, the accumulator of cycle 8, the first puncturer 9, the generator 10. of the temporary measuring pulse, the second time selector 11, the programmer 12, the general indicator 13, the meter-hch) 1ka of periods 14, the second accumulator} 1tel 15} of the second accumulator of cycle 16 .

The device works in the following way.

The input emulsion-modulated signal is fed simultaneously to the 2 N video detector peak detector 1. From the output of the video detector 2 vi.deo1 mlul-s, it enters the inputs of the formers of 3, 4 pulses. At the exit

These shapers produce sharp-pointed impulses corresponding to the Time threshold of the video clip and the closest time stamp of the generator 5 to this level. Etn impulses enter the measuring impulse 10 and form an measurement pulse from the pulse that opens the first and second time signals selectors 6, 11.

During the operation of the measuring strobe pulse, the pulses through the selector // pass through, the number of which corresponds to the number of periods of the carrier frequency of the input radio pulse per time from the measuring strobe pulse. The number of these pulses is fixed by a period counter of 14 and zamominatsya drive / 5. The number of pulses of the generator 5, which were lost through the selector 6 during the time of the measurement of the strobe pulse, is x-xened by the scale marks counter 7 and the beater 9. With the arrival of the next

The process repeats. Wherein

The output signal of the signal and the number of IU, H, the number of periods per i: at the time of use (r5. are measured in laconists 15 and 9 according to the representative,

with the number recorded in these bulbs when measuring. during the operation of the previous pulse.

The cycle of such measurements is repeated until the cycle number 8 in the accumulator of the 8 corresponds to the time chosen for the programmer 12 times ay: M1Girovi Gsum The accumulator of cycle 8 at THIS. M outputs a pulse to form the leading edge of the temporal measuring Imulse.

At the same time, in the accumulator of cycle 16 during the time of Gsum: the result of measuring the number P of periods of the frequency under study / sigiNn number of periods P during the time Gs. H can be used to determine the frequency using the well-known formula:

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R

/ whitefish - G - 7

 sum

In order to obtain a direct scale of measurement, the frame rate is set to a multiple integer digit of the decimal number.

The measurement result is provided for the registra. And on the common n-indicator 13 for the time specified by the programmer 12. Upon completion of the result reading, the imaging pulse generator 10 generates a reset signal for which the counter of the 14 and 10 lacs are zeroed, and in the scale mark counter 7, and drive 9, the number specified from the programmer is restored

Forward on the measurement beginning.

Further, the duty cycle will be repeated with the arrival of the next radio pulses.

Subject invention

A digital carrier frequency meter of radio frequency signals, containing a high-frequency plc detector, connected to a second-time impulse input

the selector, the potential input connected to the potential input of the first time selector and the left output of the time shaper of the measuring pulse, and the output to the input of the period counter, the output of which is connected to the first input through the first accumulator and the first accumulator of the cycle. m of the general ildikator, the second .input associated with the .first output of the programmer, the second output of which is connected to the first

the input of the second summator of the cycle, the output connected to the first input of the former of the temporary measuring impulse, the second input through the second accumulator - with the first output of the scale mark counter, and

the third input - with the second output of the scale mark counter, the input of which is connected via a first selector to a reference frequency generator, characterized in that, in order to improve accuracy, it is equipped with a video detector and a sync driver with a reference pulse of the video pulse, outputs which are connected to the second and third inputs of the time measuring pulse generator, the first inputs through the video detector to the input terminal, and the second inputs to the generator of the reference frequency.