RELEASED: 10/2/2006
Page 39
COMMUNICATI0NS
HSD SERIES OPERATION AND MAINTENANCE
This is an unpublished work protected by the United States copyright laws and is proprietary to EMCEE Communications.
Disclosure, copying, reproduction, merger, translation, modification, enhancement or use by anyone other than authorized
employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly
prohibited.
Copyright © 2006 EMCEE Communications. All rights reserved.
This copyright notice should not be construed as evidence of publication.
3.12 +12 Volt Power Supply System
P/N 001-4237-0007
No Schematic Diagram, PS1
The indi12V switching power supply modules install into the power supply
sub-chassis backplane through a push-in connector. Each power supply backplane
is configured to accept three power supply modules. The transmitter may be
configured for redundant power supply operation by simply plugging an extra
supply/s into the backplane. The power supply system is field upgradeable. Up to
three power supply modules may be installed without other chassis upgrades.
Power supply modules may be “hot-swapped”. Each power supply module is rated
for 800 watts and will support two Power Amplifier modules. The module provides a
2% regulation of the rated voltage output of +12vDC. The input voltage range is
85-264VAC, and the operating peak-peak
2
ripple and noise rating for the supply
module is 1%. The modules are auto-recovering from an overload situation.
Each power supply has two front panel LEDs. The left LED indicates the presence
of AC main power input and the right LED ind12Vdc output. The power
supply turn on is controlled by the logic ladder in the Control Board, and as such the
supplies are idle until called for by the control logic.
The power supply modules are an OEM part; therefore there is no field service data
available. In the event of a power supply module failure, return the defective unit to
EMCEE for repair or replacement.
3.13 Power Divider Module
P/N 50511000 Schematic Diagram N/A, DC1
The power divider module is an 8-way multi-port divider network which exhibits 9.5
dB of insertion loss. In the HSD2500A the power divider is configured with two
active output ports. The power divider is designed so that it may be upgraded to
feed additional Power Amplifier modules without requiring realignment of the Up-
Converter. Each Power Divider output port feeds one Power Amplifier module input.
The power divider module has no field serviceable parts. If a failure of the module
occurs, return the module to EMCEE for repair or replacement.
