TM 11-5841-291-12
dB
Decibels
1-5. Nomenclature Cross-Reference List.
Common Name
Official Nomenclature
Filter
fltr
Radar Warning
Radar Warning System
HI BND
High band
System
AN/APR-44(V)1 or
AN/APR-44(V)3
ind
Indication
SAM Receiver
Receiver, Radar
ICS
Intercommunication
R-2097/APR-44(V)
(low-band)
system
Receiver, Radar
AI Receiver
kHz
(high-band)
R-2098/APR-44(V)
Kilohertz (one thousand
cycles per second)
Control Unit
Control, Receiver
C-10387/APR-44(V)
LO BND
Low band
Antenna
Antenna
AS-3266/APR-44(V)
Maximum
max
Low Pass Filter
Filter, Low Pass
Receiver
rcvr
F-1503/APR-44(V)
res
1-6. List of Abbreviations.
rf
Radio frequency
A
Ampere
SAM
Surface-to-air missile
acft
Aircraft
Sec
Seconds
AI
Airborne interceptor
Sw
Switch
approx
Approximately
V
Volts
ant
Antenna
Vdc
Volts, direct current
conn
Connector
VSWR
Voltage standing wave
cw
Continuous wave
ratio
Section II.
EQUIPMENT DESCRIPTION AND DATA
filter to the front end of the SAM re-
ceiver. An rf switch in the front end
Features of Radar Warning System
switches from one antenna to the other
AN/APR-44(V)1.
in 680 millisecond intervals. The SAM
receiver responds to a cw signal in the
a. The radar warning system consists
680 millisecond interval and detects and
of five components: two antennas, a low
converts it to audio alert, lamp alert, and
pass filter, a SAM receiver, and a control
logic signals. All three signals are avail-
unit. Table 1-1 gives the physical size
able at the same time when a cw signal
and weight of each component.
is detected. The audio signal goes to the
volume control in the control unit and
b. Two antennas intercept cw signals
from there, the signal passes through
from SAM threats. The output of each
the aircraft interface circuits to the
antenna passes through a dual low pass
1-2
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