Signal Data Translator CV-1377A/PRC-47 (A8A3)-continued

TM 11-5820-509-35

The absolute level of the difference-frequency obtained

to relay K 1. As K1 operates, the transmit rf output from

by mixing is controlled by transmit gain control R148,

second rf amplifier V2 is routed directly to the gird circuit

and the parallel trap consisting of capacitor C186 and

of driver V3. The transmit if. single sideband signal is

inductor L101 attenuates any 500-kHz standard signal

applied to the junction of resistors R58 and R59. The hf

that may remain after mixing. Potentiometer R150

oscillator signal from follower Ql3 is then routed to

across the secondary winding of transformer T1 is used

transformer T1 whose secondary winding contains diode

to balance the transmitter mixer circuit to obtain

mixers CR3 and CR8. These diodes are switched on

maximum suppression of the hf oscillator signal. The

and off at the hf oscillator rate and the resulting

2.0to 11.999-MHz signal produced by the transmit mixer

waveform across R148 is a pulse-train whose repetition

is coupled through follower Q14 and amplifier Q15 to

rate and polarity are determined by the 500-kHz transmit

the rf stages(V1 and V2).

if. signal.

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