T-45A UJPT, E2-C2, ADV, & IUT Eng-26
Engineering Review
(b) STBY: places receiver-
transmitter in warmup
(standby condition); allows a
minimum of 2 minutes when
system is first turned on
(c) NORM: applies power to
receiver/transmitter at normal
receiver sensitivity for full
range operation
(d) EMER: transmits emergency
reply signals to modes 1, 2, or
3/A interrogations regardless
of mode control settings; in
addition, 7700 Mode 3/A
is transmitted automatically
(2) Identification of position (I/P)
switch
(a) IDENT: initiates identification
reply for approximately
20 seconds
(b) OUT (spring-loaded from
IDENT): prevents triggering
of reply
(c) MIC: permits IDENT replies
to be transmitted by pressing
microphone button
(3) MODE 3/A code selector: selects
and displays Mode 3/A four-digit
reply code number; for air traffic
control
(4) Mode select/test switch
(a) TEST (spring-loaded to ON):
BIT function in receiver-
transmitter self-interrogates
Modes 1, 2, 3/A, or C
Page 26-77
(8-03) Original
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