T-45A UJPT, E2-C2, ADV, & IUT Eng-21
CNI System
mic and all receiver and ICS
volumes are preset.
Individual, COMM and NAV
receiver, selections remain
available
g.
ICS volume control knob:
(1) When ALT-NORM switch is in
NORM, adjusts intercom reception
volume independent of individual
equipment volume settings
(2) When ALT-NORM switch is in
ALT - the volume level of ICS is
preset by the ground crew/standby
services amplifier and is therefore
not adjustable
h.
RCVR volume control knob:
(1) adjusts volume of all receiver audio
signals delivered to headsets.
With exception of marker beacon
audio, volume of all COMM/NAV
signals is adjustable on individual
control panels
(2) When the ALT-NORM switch is in
ALT- the receiver volume is preset
by the ground crew and standby
services amplifier and is therefore
inoperative
3.
Aircraft interfaces--COMM control panel/
Sg 2, fr 5
intercom system (ICS)
a.
ICS (COMM amplifier)
(1) Power
(a) 28 VDC generator bus and
28 VDC essential services bus
COMMUNICATIONS AMPLIFIER
BLOCK DIAGRAM
(wired in parallel): operating
(8-03) Original
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