AN/TRC-97

AN/TRC-97

The basic AN/TRC-97 radio system was developed by the Marine Corps during the early-mid 1960's. The first operational application was in South East Asia in 1966. Since then the AN/TRC-97 has been a primary means for providing inter-unit multichannel trunking for USMC and USAF tactical forces. The AN/TRC-97 series radios are all housed in S-308 series shelters (modified S-318 series) and provide a nominal one kilowatt output power with dual space diversity reception for tropostheric forward scatter communication. For line-of-sight operation, the high power amplifier can be bypassed and the one watt output of the intermediate power amplifier (TWT) fed directly to the antenna. 4 Operating frequencies are selected from 1, 200 available ~channe1s~ in the 4. 4 to 5.0 GHz range spaced in 500 kHz increments. It used analog radio and had a 12-channel capability.

AN/TRC-97A

(used in the TACS) employs 24 channels, 23 voice and one channel capable of providing 16 teletype circuits. The set may be used as a fixed terminal, relay, combination terminal/relay with capability to drop out or insert information into the system.

FREQUENCY RANGE: Continuous 4400 to 5000 MHz. (4.4 5.0 gcs). ANTENNA GAIN: Parabolic: 38db, 3 0 beam width. Horn: 20db, 18 0 beam width. POWER INPUT: 120/208 VAC, 3 phase at 400 Cps at 10 Kw. POWER OUTPUT: Tropo: 1 Kw nominal. LOS: 1 watt. SITING CRITERIA: Antenna must be free from obstacles for line-of-sight as well

                              as tropo.

ERECTION TIME: 4 men approximately 11/2 hours. MODULATION: FM DIVERSITY: Dual Space. DISTANCE RANGE: 1 to 100 nautical miles (1000 miles with relays). MAJOR COMPONENTS: NOMENCLATURE COMMON NAME S-308/TRC-97 Shelter MT-3658/TRC-97A Transit Frame. OA-7160/TRC-97A Antenna, Horn with mast. OA-8112/TRC-97A Antenna, Parabolic with mast. OA-7161A/TRC-97A Transceiver Group. GCC-6 Multiplexer Group. M-37 (being replaced) Truck, cargo, 3/4 ton (will be new, 1,5 ton truck) M-101/V-334 3/4 ton trailer, cargo MANUFACTURER: R.C.A. WEIGHT: 1760 lbs. CUBE: 240.0 cu. ft. APPLICABLE TOs: