1: Introduction
PRC1099A-MSOP
1-3
Single Sideband and HF Communications
This section discusses single sideband (SSB) mode and high frequency
communications to provide more effective communications.
Single Sideband
The PRC1099A provides voice communications in SSB mode. This mode
provides more efficient operation for high frequency communications than the
FM (frequency modulation) mode used for tactical communications in the 30
to 88 MHz range. SSB has almost completely replaced the earlier AM
(amplitude modulated) mode and provides a major advantage for HF
communications. The SSB transmitter uses special circuitry to suppress the
carrier and one of the two sidebands of an AM signal. This provides a sixfold
Package
Olive drab green, sealed, including battery
pack
Operating Temperature
-30° to +60°
Shock, Vibration,
Humidity, Fungus, Altitude
Per MIL-STD-810
Transmitter
RF Power Output
5/20W, PEP, or average, in manpack;
5/20/100/400W in mobile configuration
Duty Cycle
Continuous service, all modes
Harmonics
-50 db (2 to 30 MHz)
Receiver
Sensitivity
10 db SINAD for 0.5 uV input
Squelch
Audio derived, noise immune
Audio
500 mW into 16 ohm, 50 mW at 150 ohm, 0
dBm into 600 ohm
Antenna Tuning
Whip
AT-271A/U and longwires (use LWA for
wires longer than 15m), fully automatic
antenna tuning, 100-channel memory
Tune Time
1 to 3 seconds initial tune; 20 ms, memory
mode for preset channels (no RF output in
memory tune mode)
Antenna Switching
Tuner bypassed and 50 ohm port
automatically engaged when whip (or long
wire) antenna removed
Characteristic
Specification
