AN/ FSC-79
The AN/ FSC-79 Fleet Broadcast Terminal is a fixed SHF
SATCOM terminal capable of one transmit channel and one receive beacon channel, designed
specifically to support the Navy Fleet Satellite Broadcast. It is housed in a permanent facility
and uses a 60-foot diameter, high-efficiency parabolic reflector antenna mounted on an elevation
over azimuth configured pedestal. The terminal operates on a single channel, tunable in 1-kHz
increments over a transmitting frequency range of 7.9 to 8.4 GHz, at a maximum output of
10,000 watts.
The OM-51A/ FR Modem is an integral part of the Fleet
Broadcast subsystem. This spread spectrum modem, when used in combination with the
AN/ FSC-79 SATCOM terminal, provides an RF transmission capability in a high-level jamming
environment. The basic function of this modem is to provide RF analog and digital conditioning
on circuits and frequency synthesizing for dual redundant transmission and reception. The unit
interfaces with the AN/ FSC-79 terminal and the amplifier-converter of the AN/ SSR-1A receiver
system. When uplinking the broadcast to Fleet Satellite channel 1, only one modem is used.
The OM-51A/ FR installation consists of a standard cabinet containing seven slide-mounted
drawer assemblies. These assemblies include a summary control panel, frequency synthesizer,
receiver-synchronizer, coder-modulator, demodulator, and two power supplies.
The ON-163A/ FR Interconnecting Indicator Group is a
companion installation to the OM-51A/ FR modem. The interconnecting indicator group
provides a secondary modulation mode to the Fleet Satellite Broadcast shore terminal. The
equipment contains an OM-43A/ USC modem, a power supply, a UHF and IF patch panel, a
data patch panel, and three units of test equipment. The IF section of the patch panel provides
the capability for patching the output of either the OM-51A/ FR or the OM-43A/ USC as the
uplink signal to the AN/ FSC-79 transmitter. The UHF section has the capability to patch a UHF
test signal to an online AM-6534/ SSR-1 down-converter. The data patch panel enables patching
the 1.2 kbps data stream to the input of the OM-51A/ FR or the OM-43A/ USC. The three units
of test equipment are a frequency counter, a spectrum analyzer, and a UHF signal generator.
Sources and Resources
http://www.fas.org/spp/military/program/com/an-fsc-79.htm
Maintained by Robert Sherman
Originally created by John Pike
Updated Saturday, April 04, 1998 9:28:42 AM