MIL-HDBK- 162A
Volume 1
15 December 1965
Section 2
DATE: 1 July 1964
ITEM NAME: RADAR TRANSPONDER BEACON
COGNIZANT SERVICE: USN
TYPE: AN/APN-13
FEDERAL STOCK NUMBER:
USA
USN
USAF
USMC
STATUS OR TYPE CLASSIFICATION
Std
Mfg(s) Name or Code Number: Pratt Industries, Inc., Philco Corp.
pulses received from radar equipments are used to key
its transmitter and send pulses to the interrogating radar.
Provision is made for the installation of a coder for more
positive identification.
RELATION TO SIMILAR EQUIPMENT
None.
TECHNICAL DESCRIPTION
Frequency: Transponder - 2960 to 3060 mc
Local Oscillator - Approx 2930 to 3030 mc
(30 mc lower than received signals)
Intermediate Frequency - 12 mc
Video Amplifier - 2 mc
Pulse Repetition Rate: 600 pps
Pulse Duration: 0.4 sec
Pulse Monitoring Voltage: 5 to 70v
Peak Power Output: 500w
Video Output Dynamic Impedance: 600 ohms
Operating Range: 50 naut mi
Ambient Temperature Range: -27 deg F to +122
deg F (-35 deg C to +50 deg C)
Power Requirements:
105 to 130v, 400 to 2,400 cps, 1-ph, 250 va
12 or 24 vdc, 0.15 amp
FUNCTIONAL DESCRIPTION
Antenna Characteristics: 3-dipole, omnidirectional
radiating element
The AN/APN-13 is designed to establish the identity
of the aircraft in which it is installed. The
INSTALLATION CONSIDERATIONS
Not available.
AN/APN-13: 1
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