TB 43-0123
AN/APN-171A(V)1
JKW
AN/APN-171A(V)Radar Altimeter Set
AS-1858/APN-171(V)................. Antenna (2 ea)
1. Brief Description: The AN/APN-171AM1 altimeter
F-1263/APN-171A(V) ................. Band Suppression Filter
set is an airborne low-altitude-sensing radar system. The
ID-1345AAPN-1716(V)............... Height indicator
altimeter set uses narrow pulse transmission and leading
MT-4167/APN-171(V) ................ Mounting Rack
edge tracking of the echo return pulse for a continuous
RT-804A/APN-171(V) ................ Receiver-Transmitter
indication of aircraft altitude. Accurate high resolution
tracking is maintainable at altitude between 0 and 5000
2. Applicable Tools and Test Equipment:
feet as displayed on a servo actuated height indicator.
The pilot of the aircraft is provided with information on
See appendix B for nomenclature, NSN, etc.
distance to the nearest terrain and also enables a pilot to
maintain accurate altitude reference during low level
Type No.
AVUM
AVIM
operations. The transmitter operates at a frequency of
AN/APM-322
X
4300 MHz with a peak power of 25 to 100 watts at 1 to
AN/APM-323
X
1000 feet and 100 to 300 watts 1000 to 5000 feet. The
AN/URM-52B
X
input power requirements are 115 volts AC, 400 Hz at
ANIURM-8
X
100 watts and 27.5 volts DC at .35 amp Major
SN/URM-105C
X
components of the AN/APN-171 M)1 are as follows
ll-B-2
