T-45C TS, ADV & IUT ENG-21
CNI System
c.
Enables preset of up to 30 operating
frequencies, which allows for ease of frequency
selection while flying formation or other
demanding maneuvers
NOTE: The LED readouts will display the
frequency or channel of the cockpit that has
control.
2.
UHF/VHF functionality
Sg 2, fr 5
UHF/VHF Control
a.
MODE control selector
Panel
(1) OFF: power is removed from the set
(2) T/R: set is energized to receive and
transmit on selected channel or frequency
(3) T/R & G: same as for T/R position except
Guard receiver is energized to receive on
guard frequency applicable to frequency
band selected on main receiver
(4) DF: not functional
(5) TEST: initiates built-in-test (BIT) for the
RT. Test results are displayed on the
frequency/channel display.
(a) 888.888 indicates system readiness
(b) Other number combinations indicate
system problem and require service by
maintenance personnel
b.
Frequency selector (outer knob)
(1) 243: RT is automatically tuned to 243.0
MHz (UHF Guard frequency) and overrides
mode control selector function, inde-
pendent of which cockpit currently has
control. All other control functions except
volume, brightness, and squelch are
disabled
Page 21-15
(9-98) Original
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