SU652502A1 - Meter of fluctuations of high-frequency oscillation source - Google Patents

Description

65 In the drawing, there is a preliminary block diagram of preparaemochem), which is based on fluctuations of sources of high-frequency oscillations. The meter for fluctuations of high-frequency oscillations sources contains a resonant ACN circuit 1, a high-frequency switch 2, moving position a, b, a two-channel correlation receiver 3, a low-frequency switch 4, the sum and difference iDicor 5, calibrator 6, divider 7, compensator Level 8 carrier, key 9 and func recorder 1O. The proposed meter fluctuations of the high frequency oscillations oscillations works as follows. The oscillation of the high-frequency source UCt and (t) 3am (B-mu (f) 1-t, where U, o (t) and (JU ,. and frequencies (c), and (t), through calibrator 6, which specifies standard levels of amplitude and frequency (phase) modulations, and divider 7 is fed to the input of resonant circuit 1 tuned to the average frequency of oscillation w, and to the first input 8 levels of carrier, to the input of switch 2 (position 5) and with the key 9 on, to the first input of the phase discriminator

AU (t1 Au | i- ooC (tl-oC (t) jsinj a))):

where P is the average phase shift of the oscillation AU (i) with respect to the oscillation U (-t), T.e. in compensation layer 8 of the dry levels, there is a strong underlining of fluctuations in the phase of the oscillation U (t) and the difference in fluctuations of the amplitudes of the oscillations U (i) and UC-t)

The oscillation from the output of the compensator .8 carrier level to the d position of the high-frequency O-switch 2 is delivered to the second input of the phase discriminator 1O of the phased quadrature addition of the oscillations AU (t) and U (i). In the phase discriminator 10, the phase fluctuations (-t) are converted to antiphase and equal fluctuations of output oscillation amplitudes. The amplitude fluctuations of pCo1. () - o1 (1) are calculated on both outputs of the discriminator 10 in phase mode.

Further oscillations from the first to the second outputs of the phase discriminator 1O,

the amplitudes of which, when the key is off, are equal to 9

 ik i /}

g-- Oj i-fiiCt) -ct (t) - f, (t)}

The sum and difference outputs of this receiver are connected to the first and second inputs of the two-channel correlation receiver 3 via the low-frequency switch 4 to the terminal 5.

When measuring the fluctuations of the frequency (phase), the low-frequency switch 4 is set to pasHofcTb and the voltage at the output of indicator 5 develops. , 4 pa 1O. The oscillation at the output of the resonant circuit 1 is) siniCtI) U) Cf) Jt - - - 4 4 (t) i, where (t) is h Ч If (.- b) is the average in time and the fluctuation amplitudes and phases of the oscillations W., (Sl) A ((S11. - (l. And% / ftbS fftlW (ax / (ft), "/ (ft, W Ca)), W (Sl.1. AndA (5P, 3 (a) respectively. the energy spectra of the processes oC (t), oC / -fc1, ..., t) (t is the modulus of the transmission coefficient and the slope of the frequency-phase conversion of the resonant circuit 1, depending on the frequency of the analysis L). Kolybani and H) to the second input of the compensator level 8 unsuchable, phased into the subtraction of oscillations and (45 and | & U (i V, the average amplitudes of which differ by a small value of g - (L U J, which is the transfer ratio of the divider 7 in four outputs. The oscillation at the output of the compensator 8 is