PHASE DISCRIMINATOR MODULE A8200.

TM 11-5820-670-30

1-38. PHASE DISCRIMINATOR MODULE A8200.

EL1AT111

Ring modulator in A8200 accepts two different signals.

11.5 MHz audio modulated signal from 11.5 MHz modulator A8100.

11.5 MHz unmodulated if. signal from mixer A1400 through A8300.

Two 11.5 MHz signals are amplified by the drivers and applied to the ring modulator. The ring modu-

lator produces both an audio output, determined by the modulation, and a dc voltage, determined by

the difference between the two radio frequencies. The audiofrequency and dc voltage is applied from

the rf trap through a low-pass filter in hunt generator A8400 to the master oscillator.

The 11.5 MHz rf carrier is shunted to ground by the series tuned rf trap.

The function of phase discriminator module A8200 is explained in detail in paragraph 1-34.

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