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a GENERAL INSTRUMENT company
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INSTRUCTION
SHEET
435-578-03
DE-SNOWER@
SINGLE-CHANNEL VHF PREAMPLIFIERS
MODELS DSS-*, SERIES
2
DESCRIPTION
Models DSS- 0, Series 2 consist of preamplifiers Model 802,
factory-tuned
to specific VHF -TV channels or the FM .
band, and power supply Model 105.
Models 802 are designed with three basic circuit arrange-
ments: for low-band channels, for high-band channels, and
for the FM band (see Specifications).
The preamplifiers
exhibit high gain, low noise, and high overload capability.
In adjacent channel areas, traps installed
between
the
antennas and the preamplifiers will maintain the necessary
selectivity.
Models 802 are enclosed in a cast-aluminum
housing
designed for mounting on an antenna mast with the acces-
sories supplied. Power supply Model 105 is designed for
indoor installation near a 115V a.c. outlet and delivers a
nominal 16V a.c. to the preamplifier's d.c. supply circuit
through the down lead. Input and output connections to
the equipment are made through 75-ohm F fittings.
INSTALLATION
GENERAL
For maximum benefit from the signal strength available at
the antenna and for minimum pickup of undesired signals,
mount the preamplifier as near the antenna terminal as
practicable.
ACCESSORIESSUPPLIED
1 Mounting Bracket
1 V-Bolt
2 Self-Locking Hex Nuts
1 6-32x~~"Self-Tapping Screw
2 6xJ~"Woodscrews
4 F-659 Connectors with Ferrules and Expansion Tool
2 WB-659 Weatherboots
PROCEDURE
1. Start the supplied self-tapping screw through the hole
in the wide end of the mounting bracket; enter the
screw from the side of the bracket with the hook (on
the narrow end).
2. Slip the keyhole slot in the tab on the preamplifier
housing over the screw so that the hook on the bracket
engages the slot at the opposite end of the housing;
tighten the screw.
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MODEL 802
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MODEL DSS-2
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Fig. 1 Preamplifier, Model 802
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Fig. 2 Power Supply, Modell 05
3. Mount the unit on the antenna mast using the V-bolt
and self-locking hex nuts supplied; the preamplifier
terminals should face down.
4. Prepare a length of Jerrold Coloraxial cable sufficient to
interconnect
the antenna and the preamplifier. Slip a
weatherboot
over each end of the cable and install
F -659 connectors on the ends as described in Instruc-
tion Sheet 435-650, included in the accessory package.
5. Connect the cable between the antenna and the ANT
terminal on the preamplifier. Apply a coating of sili-
cone weatherproofing
compound
to the connections
and slide the weatherboots over the connections.
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