Volume 1
MIL-HDBK 162A
Section 2
15 December 1965
ITEM NAME: ELECTRONIC ALTIMETER SET
TYPE: AN/APN-133
On times - ten scale, 0.3 usec max
RELATION TO SIMILAR EQUIPMENT
Loop Sensitivity: Transmitter-output
The Indicator I-152-E is also used in Radio Set SCR-
718-D, E & F auxiliary Height Indicator ID-951/APN-133
to produce 1/4- in. lobe height on indi--
may be used as an accessory to Indicator I-152-E to
cator, 120 db
provide digital readout of altitude indications.
Receiver Sensitivity
Tangental (Min) - 88 dbm
Noise Figure: 14 db (max)
TECHNICAL DESCRIPTION
Indicator:
Input Power Requirements: 100 to 121v ac,
380 to -420 cps, single ph, 1.3 amp 150w.
received pulse by initial pulse,
(with auxiliary indicator, 180w)
700 ft max
Antenna Beamwidth: 50 deg to 60 deg
minus 5 mc; max freq difference between
conical
transmitter and receiver, 1 mc.
Operational Altitude (In non-pressurized
cabin):
into 50 ohm load
70,000 ft
On times - one scale 49.164 kc plus or
Indicator - 50,000 ft above sea level
minus 0.02%
On times - ten scale 9.83 kc plus or
minus 0.3%
INSTALLATION CONSIDERATIONS
Pulse Width:
On times - one scale, 0.2 usec max
Not Available.
PRINCIPAL. COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds_
Receiver-Transmitter 1
1
8-1/2
15-1/8
8-3/8
18
RT-529/-APN- 133
Indicator I-152-E
1
6-1/2
6-9/16
12-1/2
10-1/2
Antenna AT-913/APN-133
2
1
13
2-1/U
Mounting MT-17.16'A
1
2-3/4
10-5/16
6-3/-i
Mounting MT-2500/APN-133
1
1-7/5
115-1/16
71
Visor M-3857
1
REFERENCE DATA AND LITERATURE
Technical Orders:
12P5-2APN133-2
12PS-3SCR718-21
12P5-2APN133-4
12P5-3SCR718-22
12P5-2APN133-12
12P5-3SCR718-23
12PS-2APN133-14
12P5-3SCR718-24
AN/APN-133: 2