Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
SB-640(XN-1)/BP
FUNCTIONAL DESCRIPTION
None.
The SB-640(XN-1)/BP is designed to switch radar
information from five radar sets to nine remote repeaters.
TECHNICAL DESCRIPTION
Switching is accomplished by use of identical switch and
amplifier assemblies, each assembly supplying
information to one repeater, and selection of radar
Impedance: 75 ohms input and output
information is accomplished by remotely controlling the
Heat Dissipation: 300w
position of the switch in each assembly.
Current Consumption:
Separate video amplifier, power supply, and trigger
Total - 13.5 amp
regeneration circuits are provided for each repeater.
Switch Unit (each) - 1.2 amp
Consequently, failure of any assembly in the switchboard
Amplifier Unit (each) - 0.3 amp
affects only one repeater. One section of the frame is
Operating Voltages and Power Requirements:
specially wired to permit presentation of AN/BPS-4 radar
115v, 60 cps, 3-ph
information on SS series radar indicator console in
addition to the normal SS/ST presentation. Provisions
are also included for the distribution of selected IFF from
INSTALLATION CONSIDERATIONS
three radar sets.
The SB-640(XN-1)/BP is intended for radar repeater
Not available.
system on submarine installations.
RELATION TO SIMILAR EQUIPMENT
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Radar Signal Distribution Switch- 1 75-1/2
15
25
650
board SB-640(XN- 1)/BP
REFERENCE DATA AND LITERATURE
Technical Manual:
NAVSHIPS 92729
SB-640(XN-1)/BP: 2
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