SU744359A1 - Apparatus for monitoring cross distortions - Google Patents

Description

one

The invention is intended to determine the quality characteristics of amplifiers and transmitters used to amplify single-pole signals.

The closest to the proposed cross-distortion control device is a cross-distortion measurement device comprising a two-tone signal generator, a meter, frequency dividers and multipliers, high-pass and low-pass filters, balanced modulators (including dual), and wideband phase shifters for high and low frequencies. As a result of a series of transformations of the initial two-tone sigal, the device makes it possible to distinguish low-frequency comionants in the diapason of the difference frequency of two tones, which determine the amplitudes of the combination tones due to the nonlinearity of the path under test 1. In this way, control is very complex n is cumbersome, requires careful adjustment of the elements (filters, phase shifters, balanced modulators, etc.) and, accordingly, significant production costs, which is It is practically unacceptable for control purposes on the operating transmitting equipment.

The purpose of the invention is to improve the accuracy of measurement and expand the functionality of the device.

This goal is achieved by the fact that in 5 the coitrol crossover device, containing a two-signal generator, an amplitude detector and a meter, were additionally introduced in series the rectangular nm driver, controlled by the delay multiplier, and the output of the amplitude detector was connected to the square driver and connected to the multiplier unit, and the output of the amplitude detector was connected to the square driver and the amplitude detector unit, while the output of the amplitude detector was connected to the square driver and the amplitude detector block, while the output of the amplitude detector was connected to the square driver and the amplitude detector unit multiplied; to the first input of the block is multiplied, and the output of the adjustable delay line is to the second input of the multiplication unit, the output of which is not connected to the low-frequency spectrum analyzer.

Pa figs. 1 shows a block diagram of a device for controlling unrecognized legends; in fig. 2, a – v — voltage diagrams.

The device contains a generator of 1 two-tone signal, the path under test 2, am25 plptudny detector 3, driver 4

adjustable pulses

delay line 5, block 6 multiply and

low frequency analog spectrum 7.

The device works as follows.

Claims (1)

Claim A crosstalk control device comprising a two-tone signal generator, an amplitude detector and a meter, characterized in that, in order to improve the measurement accuracy and expand the functionality, it is additionally introduced serially connected rectangular pulse shaper, an adjustable delay line and a multiplication block, the output being amplitude the detector is connected to the square-wave generator and to the first input of the multiplication unit, and the output of the adjustable delay line is connected to the second input of the multiplication unit, the output of which is connected to a low-frequency spectrum analyzer.