HUNT DISCRIMINATOR, PHASE DISCRIMINATOR; REFERENCE OSCILLATOR - WORKING EXAMPLE

TM 11-5820-401-34-3/0967-LP-432-3060

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CRS HUNT DISCRIMINATOR A3600, CRS PHASE DISCRIMINATOR A3700, AND REFERENcE

OSCILLATOR A2000. (CONT)

HUNT DISCRIMINATOR, PHASE DISCRIMINATOR; REFERENCE OSCILLATOR - WORKING EXAMPLE -

LOCAL OSCILLATOR AT CORRECT FREQUENCY

EL4GQ196

If the radio is set to 30.00 MHz, the local oscillator runs at 41.50 MHz, assuming that it is properly

alined. In this case, the output of the limiter is 5.65 MHz.

When 5.65 MHz is applied to the hunt discriminator through the buffer amplifier, no dc signal is fed

from the hunt discriminator to the damping network. Therefore, no dc voltage will be present at

TP3001 due to hunt discriminator action.

The same 5.65-MHz signal applied to the hunt discriminator is fed to the driver amplifier in the phase

discriminato r module, This frequency is compared with the output of the reference oscillator which is

applied to the Buffer Amplifier A3700.

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