Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
ITEM NAME: ELECTRONIC ALTIMETER SET
TYPE: AN/APN-141A
System Sensitivity: -125 dbm max
dial of an indicator mounted in the aircraft instrument
Antenna Characteristics
panel.
Type: Double slot array
Gain: 7.5 db
RELATION TO SIMILAR EQUIPMENT
Voltage Standing Wave "Ratio: 1.5 to 1
Beamwidth at 3 db Points. 800 line-of-
None.
flight axis, 600 roll axis
Power Requirements: 115v, 400 cyc, 1-ph,
TECHNICAL DESCRIPTION
75w max
Type of Equipment: Radar, range tracking
Shock Tolerance
Altitude Range: O to 5000 ft
RF Switching Unit: 15g max (operation-
System Response to Changes in Altitude
al), 30g max (survival)
(Tracking Rate): 0.2 A ft per sec, where
Antenna: 15g max (operational), 30g
A is aircraft altitude in ft (600 ft
max (survival)
per sec max)
Indicator: 15g max
Operating Frequency: 4300 plus or minus
Temperature Range
10 mc
RF Switching Unit: -54 to plus 950C
Pulse Repetition Frequency: 1500 pps in
(-63 to plus 2030F)
low altitude, 3000 pps in high altitude
Antenna: -54 to plus 950C (-63 to plus
Pulse Length at 3 db Points: 10 to 30
203F)
nanoseconds in low altitude, 85 nano-
Indicator: -54 to plus 710C (-63 to
seconds in high altitude
plus 1600F)
Output Power: 33 dbm (2.0w) peak in low
altitude, 60 dbm (1.0 kw) peak in high
INSTALLATION CONSIDERATIONS
altitude
Receiver Sensitivity: -65 dbm min
Not available.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
Receiver-Transmitter, Radar
1
3-1/8 x 3-21/64 x 8-3/64
6
RT-601/APN-141
Switching Unit, RF
1
2-5/64 x 3-1/2 x 8-9/64
3
SA-791/APN-141
Indicator, Height
1
3-15/64 x 3-15/64 x 5-5/16
2
ID-1015/APN-141A
Antenna AS-1233/APN-141A
2
1-15/32 x 3-7/16 x 4-17/64
0.2
SHIPPING DATA
COMPONENTS
PKGS
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
REFERENCE DATA AND LITERATURE
Technical Manuals:
NAVWEPS 16-30APN141-1:
Handbook of Service instructions for AN/APN-141 &
AN/APN-141A
NAVWEPS 16-30APN141-2:
Handbook of Overhaul instructions for AN/APN-141 &
AN/APN-141A
NAVWEPS 16-30APN141-3:
Illustrated Parts Breakdown for AN/APN-141 & AN/APN-141A.
AN/APN-141A: 2
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