MIL-HDHK-162A
Volume 1
15 December 1965
Section 2
DATE: 1 July 1961
ITEM NAME: RADAR SET
COGNIZANT SERVICE: USN
TYPE: AN/APN-97
FEDERAL STOCK NUMBER:
USA
USN
USAF
USMC
STATUS OR TYPE CLASSIFICATION
Mfg(s) Name or Code Number: Ryan Aeronautical Co., San Diego, Calif.
Illustration not available
Modulator Input SignaIs: Positive or negative
FUNCTIONAL DESCRIPTION
current pulse from converters
Modulator Output Signals: AC signal proportional in
The AN/APN-97 is a doppler radar set designed to
amplitude to frequency of input pulse and
provide a continuous measurement of heading, drift,
phased to match polarity of input signals; dc
and vertical components of the aircraft velocity.
signals proportional in level to frequency of
input pulse and with same polarity as input
signal
RELATION TO SIMILAR EQUIPMENT
Velocity Computer Input Signals: Modulator ac
output signals; 4 converter low doppler alarm
Similar to AN/APN-122.
output signals
Velocity Computer Output Signals: AC voltages
proportional to aircraft velocities; low doppler
TECHNICAL DESCRIPTION
hover, navigate
Operating Altitudes: 0 to 15, 000 ft, temperature
Transmitted Signal: 13, 500 mc
range, -44. 4 to 55 deg C
Received Doppler Signal: 13, 500 mc minus
Acceleration: up to 4G in any axis,
received signal or, received signal minus 13,
Acceleration Accuracy: 5- for velocities above
500 mc
10 knots
Amplifier Signal, Audio Gain: Between 28 and 44 db
Operating Voltages and Power Requirements:
Audio Signal Frequency: 20 to 3500 (approx)
115v, 400 cps, 110w at a 0. 8 pf 28 vdc, 14w
Converter Input Signals: Audio Doppler
Converter Output Signals: Positive or negative
INSTALLATION CONSIDERATIONS
current pulse; low doppler alarm
Not available.
AN/APN-97: 1
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