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Page Title: HUNT DISCRIMINATOR, PHASE DISCRIMINATOR; REFERENCE OSCILLATOR WORKING EXAMPLE LOCAL OSCILLATOR AT CORRECT FREQUENCY
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TM 11-5820-670-30
1-18. 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
EL1AT095
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 limiter output 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
discriminator module. This frequency is compared with the output of the reference oscillator which is
applied to buffer amplifier A3700.
1-17


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