SU720770A1 - Device for measuring distorsion of telegraph signals - Google Patents

Description

(54) DEVICE FOR MEASURING TELEGRAPH DISTORTIONS

SIGNALS

The invention relates to telegraphy.

A device for measuring telegraph signal distortions, comprising a pulse generator connected in series, and a counter, as well as a trigger, a matching unit, a comparison unit and a result fixing unit 1, are known.

However, the known device does not have the necessary measurement accuracy.

The purpose of the invention is to improve the measurement accuracy.

To achieve this goal, a decoder and two AND-OR elements are added to a device for measuring telegraph signal distortions containing successively connected pulse generator and a counter, as well as a trigger, a matching unit, a comparator unit and a fixation unit, the input of the matching unit, the output of which through the comparison unit is connected to the input of the fixation unit of the results, the output of the coupling is connected to the input of the decoder, the outputs of which are connected to the corresponding inputs of the first

And the second AND-OR elements, to the installation inputs of which the signals for setting the measurement zone are supplied, and the outputs are connected respectively to the first and second inputs of the trigger, you-. the stroke of which is connected to the resolution input of the comparator unit, the control input of which is connected to the corresponding output of the decoder.

The drawing shows a structural electrical circuit of the proposed device.

A device for measuring telegraph signal distortions contains a pulse generator 1, a counter 2, a matching block 3, a zone shaper 4 containing a decoder 5, AND-OR elements 6, a trigger 7, a compare block 8, a result fixing block 9, a control input 10 allowing input 11, information input 12.

The device works as follows.

At the time of arrival of the clock pulses, corresponding to the speed and accuracy of measurement, counter 2 is started. The cycle of operation of counter 2 is determined by the duration of the elementary parcel. The outputs of counter 2 are connected to a decoder 5, which forms a scale of 3 percent measurement. By a command from the control device, by information input 12, a signal is received that settles the measurement zone. The reference measurement zone is formed by trigger 7. Measured telegraph parcels arrive at block 3, which converts the incoming rectangular pulses into a sequence of short pulses corresponding to the characteristic times of the incoming parcels. Signal C resolving input 11, which corresponds to the reference measurement zone, permits to fix distortions that exceed the steady-state zone of the em pemtH. From block 8 comparison, the result for resFascations enters the block 9 of fixation. The result of fixing the distortion is transmitted from to the control unit. For one pa6otbi cycle of the device, one character of the transmitted text is checked. The technical effectiveness of the device for measuring the distortions of telegraphic signals is to increase the accuracy of 7ft .-, .--: Ai f - - - - f --- .--- ... ... DICE measurement. ,,.; -. h., .., .-. h-r-Ц: ilr---.cc a l a N e o b R e e N A device for measuring distortions of a body of graphical signals, containing sequentially connected pulse generator and counter, as well as a trigger, a matching unit, a comparison unit and a results fixing unit, differing in that, in order to improve the measurement accuracy, a decoder and two AND-OR elements are introduced, while the counter input is combined with the matching input whose output through the comparison unit is connected to the input of the result fixation unit, the output of the counter is connected to the input of the desch the cutter whose outputs are connected to the corresponding inputs of the first and second AND-OR elements, to the installation inputs of which the signals for setting the measurement zone are supplied, and the outputs are connected respectively to the first and second inputs of the trigger, the output of which is connected to the resolution input of the comparator unit which is connected to the corresponding output of the decoder. Sources of information taken during the examination ,,,. , -. 1. USSR author's certificate No. 350197, cl. H 04 L11/08, 1970 (prototype).

Claims (1)

~ F1 “rn'ul” invention A device for measuring distortions of telegraph signals, containing sequentially 15 connected pulse generators and counters, as well as a trigger, matching unit, comparison unit and results fixing unit, characterized in that, with the aim of - 'to increase the accuracy of the measurement, a decoder and two AND-OR elements are introduced, while the counter input is combined with the input of the matching unit, the output of which through the comparison unit is connected to the input of the results fixing unit, the counter output is connected to the decoder input, the outputs to They are connected to the corresponding inputs of the first and second AND-OR elements, the installation inputs of which are used to set the measurement zone, and the outputs are connected respectively to the first and second inputs of the trigger, the output of which is connected to the resolution input of the comparison unit, the control input of which is connected to the corresponding output decoder. ''