Volume 1
MIL-HDBK-162A
Section 1
15 December 1965
ITEM NAME: SWITCHBOARD GROUP
TYPE: AN/TPA-4
85% peak amplitude
RELATION TO SIMILAR EQUIPMENT
Output Pulse Rise Time: 0.2 usec (typical).
Normal Operating Temperature of Equipment
None.
Equipment Enclosure: Approx 15 deg C (27 deg F)
above room temperature.
TECHNICAL DESCRIPTION
Operating Temperature Range of Equipment: 0 deg
Number of Radar Indicator Circuits Accommodated:: 7
C (32 deg F) to 50 deg C (122 deg F).
Number of Radar Set Circuits Accommodated: 7
Operating Power Requirement: 115v ac, 60 to 400 cps,
Switchboard Input Capabilities
single ph, 0.75 amps
IFF Capability Receivers (4 video signals and 1
Power Dissipation: 280w
trigger signal): 4
INSTALLATION CONSIDERATIONS
Non-IFF Capable Receivers (1 video signal and 1
Related Equipment: (Required but not Supplied) (7)
trigger signal): 3
Output Control Signal Cables type MS3106A-28-1P,
Video Amplifier Circuit
(7) Input Control Signal Cables type MS3106A28-
Input Impedance: 75 ohms
1S,
(7) Output Control Signal Cables type
Pulse Polarity: Positive
MS3106A-24- 5P(W), (4) Input Control Signal Cables
Pulse Amplitude: 0.2 to 3.0v
type
MS3106A-24-55, (61) Input and Output Video
Overall Gain: One to one (var).
and
Trigger Signal Cables type UG-58A/U N-type.
Output Impedance: 75 ohms
Trigger Regenerator Circuit
Cabling Requirements: All cables for any given radar
Input Impedance: 75 ohms
input or output must be of equal length, and shall
Output Impedance: 75 ohms
not exceed 300 ft maximum.
Pulse Polarity: Positive
Input Pulse Amplitude: plus 7v min
Output Pulse Amplitude: plus 20v, plus or minus 5v
Input Pulse Duration: 3.5 to 4 usec at
PRINCIPAL COMPONENTS AND PHYSICAL DATA
SHIPPING DATA
COMPONENTS
BOXES QTY
OVERALL DIMENSIONS
UNIT WT.
(NR.)
(Inches)
(Pounds)
Switchboard Group AN/TPA-4
1
24-3/8 x 26-3/8 x 65-1/4
475
EQUIPMENT SUPPLIED DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
Switchboard, Signal Distribution,
1
16-1/8 x 22-1/2 x 49-7/16
Radar SB-948/TPA-4
Control, Remote Switching C-3140/TPA-4
7
2-31/32 x 4-3/16 x 18-11/32
Case, Accessories CY-2740/TPA-4
1
7-7/8 x 19-1/4 x 24
Case, Switchboard CY-2741/TPA-4
1
19-1/4 x 24 x 50-1/4
Cable, Assy, Power Electrical
1
CX-4936/U
Cable, Assy, Special Purpose, 7
Electrical CX-4937/U
REFERENCE DATA AND LITERATURE
Technical Manuals:
NAVSHIPS 93659
AN/TPA-4: 2
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