TB 43-0123
ANIAPX-72
0-879-0211
JNF
RT-8599/APX-72 and MT-3809/APX-72 and MT-3948/APX-72
product improved version of the RT-859/APX-72
1. Brief Description: The AN/APX-72 is an airborne
components of the AN/APX-72 are as follows:
transponder which operates in conjunction with
ground IFF equipment. The transponder, upon
C-6280A(P)IAPX ........ Transponder Control
receiving an interrogation signal from the ground
MT-38099/APX-72 ..... Mount
station automatically transmits a coded reply. Five
RT-859APX-72 ........... Receiver-Transmitter
independent coding modes are reliable to the pilot.
or
Mode 1, 2, and 3A provide various code
RT-859A/APX-72 ..... Receiver-Transmitter
combinations, which are selectable in flight on Modes
or 1 and 3A. In Mode C, pressure altitude is
The following components are used with but are not
obtained from the RT encoding altimeter and
a part of the ANPX-72:
provided through the transponder to the ground
interrogator.
Mode 4, which uses an external
AAU-32/A .................... AIMS Altimeter
computer, can be selected to display any one of
AT-741/A ..................... Antenna
many of the A classified codes for security
or
identifications. An emergency mode of operation is
AT-884/APX ................. Antenna
also available to the pilot. The AAU-
emergency
KIT-1ATSEC ................. Computer
reply indicates to the ground interrogator that the
MT-3513//APX............... Mount
TS-1843/APX)
aircraft is in distress. The AN/APX-72 transmits on a
or frequency of 1090 MHz while receiving on 1030
MHz. The input power requirements is 28 volts DC
at 2 amps or 115 volts AC. 400 Hz at 95 watts. The
RT-859/APX-72 is a
II-C-1
