SU128908A1 - Device for removing characteristics of electronic and mechanical rearrangements of generators - Google Patents

Description

The known devices made by the method of oscillographic determination of the change in the steepness of the restructuring of the microwave generators do not provide sufficient resolution, which is limited by the difficulties of implementing slowing systems with low losses in the microwave range.

The proposed device allows to increase the resolution of the instrument. This is achieved by increasing the frequency ratio of the saw-tooth voltage generators, which is a test-driven oscillator with a tunable frequency oscillator.

FIG. 1 is a block diagram of the device.

The generator under test is modulated by a linear sawtooth voltage with frequency FI; the local oscillator, a generator of the same type as the subject, is modulated by a voltage, g, frequency FZ. The intermediate frequency signal received at the mixer is fed to the input of the intermediate frequency amplifier with a narrow bandwidth tuned to the operating frequency fo.

At a certain frequency 1 heterodyne at the output of the usi body, BudZt has two pulses corresponding to the frequencies i and / and the generation of the test generator at which the intermediate frequency / o fr - A and / o / 2 - / g is formed

From the output of the intermediate-frequency amplifier, pulses are applied to a device (for example, a trigger circuit with two stable equilibrium positions), forming right-angle pulses with a duration equal to the time interval between the generation times by the test generator fj and / g; the magnitude of this interval, provided that the modulating voltage is linear, is inversely proportional to the steepness of the electronic frequency setting. Thus, the difference between the frequencies / i and / o (Af 2 / o)

 128908- 2 h “l“ - - - ---

to | dl15 | A || I | WAYJULS, that is, L / T fully characterizes the slope of the tested generator by the electrocoupling of the frequency of the tested generator.

: 8 traces & vietbgo, ta-a, the frequency of the local oscillator changes more slowly than the 5N | 1 | 1NHFR-> iSignal generator, then it is changed in a single period — often, only one generator of light will be produced; c: response to a certain section of the characteristic of the electric motor (: Gn6 tiactrayki, and for one period of change in the frequency of the local oscillator, a series of rectangular pulses corresponding to all sections of the characteristic of electronic tuning will be obtained.

Square pulses are applied to the demodulator, which transforms P1. Pulses of different duration to pulses of different amplitude. As a result, on the screen of an OSPillograph, to which a scan with a frequency FI is applied, one can see pulses whose amplitude is inversely proportional to the steepness of the electronic tuning of the tested generator, and their envelope characterizes the change in steepness in the entire generation zone. Similarly, the determination of the steepness of the mechanical tuning of the generators with a rapid mechanical adjustment is made (see the block diagram in Fig. 2). The difference lies in the fact that the restructuring of the test generator and the local oscillator is carried out with the help of an electro-electric engine with a different frequency of reorganization FI ri F.

P 1) C dme t invention

An E.1I device is designed to characterize electronic and mechanical rearrangements of generators, based on the use of a sawtooth source connected to an electronic oscilloscope and control electrode of the test generator, mixer, amplifier, and circuit that generates output pulses, characterized in that device resolution, it contains a local oscillator with a rearrangement carried out by a sawtooth voltage, whose frequency is two orders of magnitude lower than the frequency of a sawtooth voltage, m the test peer odulling agent.