Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
ITEM NAME: BEACON SYSTEM, RADIO
TYPE: AN/UPN-14
Frequency: 2 channels, switched select able,
1850
RELATION TO SIMILAR EQUIPMENT
and 1950 kc
Bandwidth: 80 kc plus or minus 5 kc to
None.
6 db down from center freq.
Video Response: Flat within plus or minus
TECHNICAL DESCRIPTION
2 db from 150 to 20, 000 cycles.
Local Oscillator
Type of Indicator: Cathode-ray tube type.
Type: Crystal
Effective Range Coverage: Up to 500 mi at
Frequency: 2950 and 3050 kc
sea (distance of ship from 2 shore sta-
Intermediate Frequency: 1100 kc
tions suitably seperated).
Signal to Internal Noise at Minimum Signal:
Accuracy: Better than 0.2 usec for 95% of
10:1.
readings under normal conditions.
Input Impedance: 50 ohms
Repetition Rate: 41-2/3 and 33-1/3 pps,
Output Impedance: 50 ohms
switch selectable.
Operating Power Requirements: 115v ac, 60
Transmitter Characteristics
cycles, 1-ph
Type: Pulsed oscillator, self-excited.
Transmitter Power Output: 275w (at 20 kw
Frequency Range: Fixed tunable, 1700 to
output).
2000 kc
Receiver-Indicator: 595w
Frequency: 1850 and 1950 kc
Output Pulse: 70 usec duration at 50%
INSTALLATION CONSIDERATIONS
amplitude.
Rise Time: 8 plus or minus 2 usec from
Related Equipment:
10 to 90% amplitude.
Required but not Supplied
Maximum Peak Power: At least 18 kw
(300 ft) Antenna Wire, Bronze, stranded
Output Impedance: 50 ohms resistive.
No. 10; (200 ft) Power Cable, Armored,
Spurious Radiation: 60 db down from
2 conductor, No. 8 copper; (4) Antenna
radiated power.
Insulators (12 inch); (1) Lead-in-Insu-
Antenna (Not supplied): 25-100 ft T-type.
lator for AN/SPN-24; (1) Antenna Sys-
Receiver Characteristics
tem for AN/SPN-24; (1) Radio Receiver
Type: Superheterodyne, wide band.
& Instruction Manual; (1) Radio Trans-
mitter & Instruction Manual.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
Transmitting Group OA-1521/SPN-24
1
consists of:
Radar Transmitter T-638/SPN-24
1
16 x 20-1/4 x 25-3/4
133
Power Supply PP-1756/SPN-24
1
16 x 20-1/4 x 25-3/4
133
Receiver Group OA-1523/SPN-24
1
consists of:
Power Supply Receiver PP-175B/SPN-24
1
16 x 20-1/4 x 25-3/4
185
Range Indicator IP-426/SPN-24
1
16 x 20-1/4 x 25-3/4
140
Antenna Coupler CU-468/SPN-20
1
9 x 14-1/2 x 19-3/8
14
Line Regulator CN-481/SPN-24
1
8-3/4 x 12-3/16 x 21-3/8
40
Angle Connectors UG-913/U
12
Connectors UG-8BC/U
2
Connectors UG-925A/U
2
AN/UPN-14: 2
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