138
SINCGARS
Retransmission Operation
• Used with SINCGARS waveform only
•Two RETRANS methods:
¾
Black Digital
9
Not within 20%
9
Not harmonics
¾
Range Extension
9
Radios spaced far apart
Retransmission option is only available from a SINCGARS preset.
• A Black Digital retransmit station consists of two radios and a Retransmit cable.
The radios are programmed with different Single Channel frequencies, Net IDs or
a combination. Single channel frequencies cannot be closer than 20% of each
other or a harmonic. For example: if 40 MHz is used the second frequency
cannot be less than 48 MHz or be 80 MHz (the 1
st
harmonic). No COMSEC is
loaded in the retransmit radios; they are operated in Plain Text and just pass the
encrypted digital signal through the retransmit cable. All outstations are in Cipher
Text.
A Range Extension retransmit station has one radio programmed to receive
signals on a SINCGARS net and the second radio is programmed to retransmit
that signal on the same SINCGARS Net. Only SINCGARS Frequency Hopping
is supported using Range Extension. Range Extension will not operate in Single
Channel! The retransmit radios are also in PT and the out stations are in CT.
Place the radios as far apart as possible. If using a VAA, place the antennas as
far apart as possible.
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