FLEXCOMM
II
C-5000 (Non-Digital)
Installation Manual
150-1355-000 Rev. M
CONFIDENTIAL AND PROPRIETARY TO COBHAM
Page 70
Pin(s) - Signal Name (Continued)
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.
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.
37 - RT-X WB MN RCV AUDIO OUT
This signal is a wideband received audio signal from the selected RT system (1, 2
or 3) main receiver. It is not squelch gated and typically is used with external
encryption equipment connected to the system interface. The standard level is 6
Vpp although A2R135 provides an adjustment range of 1.2 to 12 Vpp. The
Motorola encryption equipment requires 4 Vpp.
42 - EXT RT-X DECODED RCV AUDIO
This input is typically used with external encryption equipment connected to the
system interface. The signal is the decoded or de-encrypted voice band clear text
from the encryption system. By proper C-5000 system programming, this signal
can be routed directly as the selected RT system (1, 2 or 3) recovered audio or it
can be internally summed with the selected RT system guard audio, sidetone, or
both. In addition, the recovered audio can also be programmed to provide de-
emphasis if required. A level of 2 Vrms is standard, although A2R131 provides an
adjustment range of 0.25 to 7.75 Vrms.
61 - EXT RT-X WB XMT AUDIO
This input provides for wideband digital audio (encrypted or cipher text)
modulation input to the selected RT system (1, 2 or 3). Modulation level of 6Vpp
is standard, although A2R141 on the system interface board provides and
adjustment range of 1.2 to 12 Vpp.
60 - AUX +15 VDC
This output can be used to power external auxiliary equipment. Total load cannot
exceed 600 mA. In addition, the combined external load of + 15V, -15V and +5V
outputs cannot exceed 11.5 Watts.
58 - AUX -15 VDC (OPTIONAL)
This optional output can be used to power external auxiliary equipment. A
jumper must be installed on the system interface board to activate this output.
Total load for this output cannot exceed 100 mA. In addition, the combined
external load of +15V, -15V and +5V outputs cannot exceed 11.5 Watts.
