Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
ITEM NAME: AZIMUTH-RANGE INDICATOR
TYPE: IP-281A/UP
Pulse Repetition Frequency: 57 to 2000 cps.
RELATION TO SIMILAR EQUIPMENT
Video Input: 1 to 2.5v pos
Trigger Input: 5 to 50v pos
IP-281A/UP is mechanically and electrically
Azimuth Rotation Speed: 0 to 20 rpm
interchangeable with Indicator IP281/UP, except for
component parts.
INSTALLATION CONSIDERATIONS
TECHNICAL DESCRIPTION
Related Equipment: IP-281A/UP is used with but not
part of AN/SPS-21A, AN/SPS-21B.
Power Requirements: 115v plus or minus 11v- 60
cycles plus or minus 2 cycles, 200 va, 90% pf.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
Azimuth-Range Indicator IP-261A/UP
1
16-1/4 x 17-1/4 x 29
93
SHIPPING DATA
COMPONENTS
BOXES
OVERALL DIMENSIONS
UNIT WT.
(NR.)
(Inches)
(Pounds)
Azimuth-Range Indicator IP-281A/UP
1
25 x 28 x 41
207
PPI Tube 10WP7A
1
17 x 19 x 29
54
Equipment Maintenance Parts
1
9 x 11 x 14
15
Viewing Hood
1
11 x 11 x 13
3
REFERENCE DATA AND LITERATURE
Technical Manuals:
NAVSHIPS 92285(A): for Azimuth-Range Indicators IP-281/UP,
IP-281A/UP, IP-281B/UP.
IP-281A/UP: 2
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