Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
AN/APN-1A
Range, Min: 10 ft
FUNCTIONAL DESCRIPTION
Peak Power Output: 1w
The AN/APN-1A is designed for installation in
Operating Voltages and Power Requirements:
aircraft to provide direct indication of altitude relative to
27.5 vdc, 2.7 amp
the terrain during flight. This cw-fm altimeter also may
Type of Presentation: Meters
be used in conjunction with an automatic pilot system.
Number and Interval of Range Markers:
2 ranges, 0 to 400 ft and 400 to 4,000 ft
RELATION TO SIMILAR EQUIPMENT
Duty Cycle: Continuous
Environmental Limitations:
Maximum length of antenna coaxial cables - 50
None.
ft
Maximum ambient temperature - 122 deg F
Altitude indicators must be at least 20 in.
TECHNICAL DESCRIPTION
from any magnetic compass
Frequency: 420 to 460 mc
INSTALLATION CONSIDERATIONS
Range, Max: 4,000 ft
Not available.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
Radio Transmitter-Receiver
1
7.14
18.06
8.59
18.7
RT-7/APN- 1
Altitude Indicator ID-14/APN-1
1
8.25
3.25
5.03
1.8
Altitude Limit Switch SA-1/APN-1
1
3.25
3.25
5.72
0.95
Antenna AT-4/APN
2
7.25
11.56
1.72
0.7
REFERENCE DATA AND LITERATURE
Technical Orders:
Specifications:
12P5-2APN1-2
RCA-AS-5796-G
12P5-2APN 1-1
12P5-2APN 1- 14
AN/APN-1A: 2
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