LEARNING EVENT 8: EQUIPMENT DESCRIPTION
1. Radio set AN/PSC-3( ) (Figures 4-4a and 4-4b) is a battery-operated, portable communications terminal
of 225 MHz to 400 MHz in both satellite and LOS modes of operation.
Figure 4-4a. AN/PSC-3( ) with OA-8990( )/P DMGD.
The terminal uses a low-gain omnidirectional whip antenna for LOS operation while in motion. This antenna
also enables reception of a satellite alert ringing signal while in LOS mode (Figure 4-4b). The set uses an AS-
terminal provides half duplex communications at 300 bp/s and 1200 bp/s biphase shift keying (BPSK), 2400
bp/s synchronous BPS 16 kbp/s FM and frequency shift.