Figure 2-1. Radio set AN/PRC-47, Overall Block Diagram.

TM 11-5820-509-35

Figure 2-1. Radio set AN/PRC-47, Overall Block Diagram.

or frequency shift keying (fsk) teletypewriter

Amplifier AM-3506/PRC-47 (A1) by the microphone of

communications when an appropriate input/output

Handset H-33G/PT or by the external fsk unit (for

device is connected.

The operating frequency is

example, Converter Oscillator

CV-786/TRC-75).

determined by the adjustment of front panel frequency

Internal limiter stages and automatic load control

controls that permit operation within the range from 2.0

circuits in the transmitter compensate for input level

to 11.999-MHz. During the transmit function, the audio

variations from these audio input devices. When cw

signal is applied to the input of Audio Frequency

2-2