AN/GRC-239 Tropo Satellite Support Radio (TSSR)
The AN/GRC-239 Radio Set is a full duplex line of site microwave radio designed for quick
deployable military applications. Also known as the Tropo Satellite Support Radio (TSSR), this
radio's ease of set-up, transport, and reliable operations make it a great substitute for long cable
runs. The operating range of the TSSR is 14.4 to 15.25 GHz. The AN/GRC-239 is fully
compatible with the older TER-170 TSSR. The TSSR uses FM modulation and is used with
almost all existing TRI-TAC equipment.
The TSSR(V)2 is a solid state, Frequency
Modulated (FM), wideband microwave radio system designed to replace
existing tactical CX-11230 dual coaxial cable runs or Tactical
Fiber Optic Cable Assemblages (TFOCA) interconnecting the AN/TRC-170(V)
(or other TRI-TAC equipment, including GMF) with remote locations.
The original intent for the utilization of this system was to
remote tactical high power RF emitters away from operational areas.
The TSSR(V) is capable of Line-Of-Sight (LOS) transmission
paths only. The radio transmits and receives in the 14.4-15.25
GHz range (100 Khz steps). Transmit to receive frequencies should
be 100 MHz or greater in separation. The radio was purposely designed
with a low power output (300mW), based on it's original concept
of operation. This limits supportable path lengths to about 5-10
The TSSR(V) is capable of providing connectivity
to a single TRI-TAC Digital Trunk Group (DTG) with a data rate
from 72-4608 KB/s. The TSSR(V) can also support a Balanced NRZ
group from the AN/TAC-1 at a 6.144 MB/s data rate. A analog voice
orderwire capability is also modulated onto the RF carrier.
Sources and Resources
Maintained by Robert Sherman
Originally created by John Pike
Updated Tuesday, January 12, 1999 5:50:29 AM