Specifications

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SS 4.2 Installation and Operation Manual
INSTALLATION
It is recommended that all cables connected to the SS 4.2 be looped through fer-
rite cores to suppress RF. Surge protection with RF filtering such as the Tripp Lite
“ISOBAR 4” is also suggested for the power transformer. The purchase of an
inexpensive uninterruptible power supply (UPS) will provide back up in case of
power outages. Check out our web site for lightning protection links.
Adjusting Input and Output Levels:
Once the input and output connections have been made, the input levels can be set.
The switcher is factory set for unity. Recommended input levels would be in the
range of -15 dBu to +10 dBu. Should input levels need to be changed, they are
accessible from the rear panel. Each stereo input and output is labeled and has one
trimmer per channel.
Input Channel Expansion:
Input expansion may be accomplished by connecting a shielded cable between the
first units EXT 1+ input terminal and the second units unbalanced output. The
shield should be connected to the ground terminal. Follow the same procedure for
the EXT +1 right channel. The above example provides 8 inputs, with the first
providing the main output.
Remote Control:
Most front panel functions of the SS 4.2 may be remote controlled via the plug-
gable screw connectors located on the rear panel. The SS 4.2 accepts momentary
contact closures, open collector or TTL/CMOS logic levels. Open collector sta-
tus/tally is also provided and follows the action of the front panel LED’s.
Serial Interface:
The multi-drop RS-232 transceiver always switches between transmit and receive
mode, unless the unit ID is zero. In that case, the unit will always leave the RS-
232 transceiver enabled. This is the correct setting for a single unit controlled via
RS-232.
WEBSITE:
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