T-45A UJPT, E2-C2, ADV, & IUT Eng-21
CNI System
(5) READ: enables selection of any
one of 30 preset frequencies with
the channel selector (inner knob).
Displays frequency (rather than
channel number) of the preset
channel on frequency/channel
display
(6) LOAD: automatically loads into
system memory manual frequency
displayed by selected preset
channel
c.
RCVR volume (VOL) control knob:
adjusts level of UHF/VHF audio signals
delivered to the communications
amplifier
NOTE: With exception of the marker
signals volume, volumes of the COMM,
VOR/ILS, and TACAN are adjustable
from each cockpit through the COMM
control panel.
d.
Squelch switch
(1) SQL: eliminates receiver back-
ground noise when no signal is
being received (decreases recep-
tion sensitivity)
(2) OFF: disables main receiver
automatic squelch to increase
reception range/sensitivity
e.
Frequency select switches: used to
manually select desired frequency
when frequency selector in MAN
position
f.
FREQ (CHAN) display window:
displays digital readout of selected
frequency or channel
(8-03) Ori.ginal
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