RELEASED: 10/2/2006
Page 5
COMMUNICATI0NS
HSD SERIES OPERATION AND MAINTENANCE
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Copyright © 2006 EMCEE Communications. All rights reserved.
This copyright notice should not be construed as evidence of publication.
1
THE HSD SERIES TRANSMITTER 0VERVIEW
1.1 Introduction:
The EMCEE
HSD Series
TM
transmitter is a modular, frequency agile, format agile, self-
contained S-Band broadcast transmitter that is designed to provide up to 400 Watts peak
power or 100 Watts average power on any FCC or CCIR specified channel from 2500MHz
to 2700MHz. The transmitter will accept either a digital input or a composite analog input.
The transmitter is also available configured for multi-channel operation. To provide
maximum performance and reliability, the
HSD Series
TM
Transmitter is completely solid-
state. The transmitter design includes IF linearity pre-correction, which minimizes the in-
channel intermodulation products; oscillator and converter circuits optimized for very low
phase and FM noise, which allows for depth of modulation up to 256QAM; automatic
internal or external synthesizer lock, for use with phase-locked systems; and infinite tuning,
by 1 MHz steps, across the entire band
.
The transmitter is designed to provide
configurable and upgradeable output power, requiring only a 6RU rack footprint. It features
minimum weight and low power consumption; and employs comprehensive indication,
control, and protection circuitry. To provide additional reliability, the
HSD
Series
TM
transmitter system is designed to utilize a redundant N+1 power supply and power
distribution system (HSD
PLUS
). The transmitter will facilitate either digital or analog
transmission, and is compatible with all world analog transmission formats.
Each transmitter is composed of a Power Supply assembly, Up-Converter Assembly, one
or more 12.5 watt Final Amplifiers, and an optional Control/Status interface. The
Control/Status interface allows the unit to be remotely controlled via computer and
graphically shows the status of the transmitter; aiding the operator during turn-on, operation
and maintenance.
Optional output filters are available for additional suppression of out of channel products.
The HSD Transmitters are available in the following output power configurations:
¾
HSD-250
1
10 Watt Peak/2.5 Watt Average Power
¾
HSD-1250/HSD-1250
PLUS
50 Watt Peak/1-12.5 Watt Average Power
¾
HSD-2500/HSD-2500
PLUS
100 Watt Peak/2-25 Watt Average Power
¾
HSD-3750/HSD-3750
PLUS
150 Watt Peak/3-37.5 Watt Average Power
¾
HSD-5000/HSD-5000
PLUS
200 Watt Peak/5-50 Watt Average Power
¾
HSD-10000/HSD-10000
PLUS
400 Watt Peak/10-100 Watt Average Power
The HSD-XXX
PLUS
configurations feature N+1 redundant power supplies.
1
The HSD-250 is used as the Up-Converter/Driver assembly for all other models.
