4.38.2 AN/APR-39A(V)1 Radar Warning Display Con-
The operating controls of the RW display, located
on the right side of the pilot instrument panel (fig 2-9 and
4-24), are described in table 4-26. The display shows the
4.38.3 AN/APR-39A(V)1 Operation Modes.
set may be operated in either MODE 1 or MODE 2. The
RW set receives 28 vdc from the emergency dc bus
through the RDR WARN circuit breaker on the pilot over-
head circuit breaker panel. The RW set is not monitored
a. MODE 1 Operation.
By selecting MODE 1 nor-
mal synthetic voice messages will be heard when an emit-
ter has been processed (ie. RW will announce; SA, SA-8
TWELVE OCLOCK TRACKING). Selection of this mode
does not have any effect on emitters received, processed,
or displayed. It only affects synthetic voice audio.
b. MODE 2 Operation.
By selecting MODE 2 terse
or abbreviated synthetic voice messages will be heard (ie.
RW will announce; MISSILE, MISSILE TWELVE
Symbol generation and position relative to the center of
the RW display shows threat lethality. It does not show or
represent any lethality of range but of condition/mode of
the emitter. Highest priority threats (most lethal) are
shown nearest the center. Each symbol defines a generic
threat type. The definition of what the symbols mean is
classified. The complete set of symbols and definitions
are contained in TM 11-5841-294-30-2.
MA LAMP SWITCH
Radar Warning Display
4.38.4 AN/APR-39A(V)1 Self-Test Operation.
vides a GO/NO-GO test of system functions. Self-test can
be run at anytime. The complete self-test runs in less than
30 seconds. When installed, the AN/AVR-2A(V)1 laser de-
tecting set is tested simultaneously when the AN/
APR-39A(V)1 radar warning system is tested.
a. Self-test procedures are as follows:
1. PWR switch ON. Listen for synthetic voice
message APR 39 POWER UP.
2. MODE switch 1 or 2 position.
MODE 1 provides long count for self-test.
MODE 2 provides short count for self-test.
AN/APR-39A(V)1 Radar Warning Display (CRT) Control/Indicator Functions
Adjust CRT display brightness.