User's Manual

C-5000 COMMUNICATION MANAGEMENT CONTROLLER
INSTALLATION MANUAL
Page 4-8 Publication No. 150-041118
Section 4 – Electrical Installation Rev C
May 2006
Pin(s) - Signal Name
16, 33 - RT-X SELECT A & B
Unavailable function.
13 - RT-X GUARD AUDIO OUT
This pin provides the selected RT System Guard RCV Audio (voice band) signal
for use with external equipment. Typically the plain text guard audio is summed
with decoded main RCV audio and routed to the C-5000 for combined main
(recovered cipher) and guard (clear) to the headset. Standard levels are 2 Vrms
at low impedance, although A2R114 on the system interface board provides
adjustment range of 0.5 to 4 Vrms.
7 - REXMT AUDIO IN
This input provides an auxiliary voice band transmit audio input and is summed
with the primary mic audio. The receive audio from other equipment can be
routed to this port and in conjunction with the "PTT from Ext. Cipher" (an auxiliary
PTT input), a multi-system relay can be established. A level of 2 Vrms for
standard modulation is standard, although A2R167 on the system interface board
provides an adjustment range of 0.1 to 7.75 Vrms.
1 - RT-X REXMT AUDIO OUT
This pin provides a voice band receive audio output from the selected RT system
(1, 2 or 3). The audio is normal audio from the selected radio system and
includes both main and guard audio as well as sidetone during XMT. In
conjunction with REXMT control key out, (squelch activity from this system and
PTT input to other aircraft equipment) this signal may be used in a multi system
relay to provide receive audio from this system to transmit audio to other
equipment on board the aircraft.
Typical application with external encryption equipment connected to the system
interface utilizes this signal as clear text receive audio to be routed to, and
returned from, the external equipment in time of nonencrypted reception to the
RT-X Decoded Audio Input. The signal level is 2 Vrms for standard voice,
although A2R108 on the system board provides an adjustment range of 0.2 to
7.75 Vrms.
Pin(s) - Signal Name
34 - RT-X REXMT CONTROL KEY OUT
This signal provides a ground output when the selected radio system (1, 2 or 3)
main receiver is active (squelch activity). This signal provides a PTT input to
other aircraft equipment in a multi-system relay mode.