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SERVSWITCH™ BRAND 8 X 2 MATRIX VIDEO SWITCH
If either of your output devices are designed to receive a non-VGA video
signal and/or use a different type of video connector, you might need special
cables or adapters; call Black Box Technical Support.
3. For each of the two outputs there is an 8-position DIP switch on the Matrix
Video Switch's rear panel—labeled "GAIN A" for "OUT A" and "GAIN B" for
"OUT B"—that you can use to control the gain applied to the corresponding
input signals. For each of the eight inputs, calculate the total lengths of the
video cables from the source to each of the two destinations (the devices
attached to OUT A and OUT B). Then set the corresponding switch position
("1" for input 1 through "8" for input 8 on either GAIN A for OUT A or
GAIN B for OUT B): Move it DOWN if the total length is 100 ft. (30 m) or
less, or UP if the total length is over 100 ft. (30 m). (In the UP setting, extra
compensation is added to the signal to make up for the high-frequency losses
typical of longer cabling.)
4. Plug the output cord of the Switch's power supply into the Switch's 5-pin DIN
female power inlet. Plug one end of the power supply's input cord into the
transformer's IEC 320 male inlet; plug the other end of the input cord into a
working AC outlet.
The Switch should power up automatically in its factory-default state (it
has no ON/OFF switch): If you're running single-head video, both of the
Switch's outputs will be set to display input #1 (even though there's no video
present yet). If you're running dual-head video, output #1 will display
input #1 and output #2 will display input #5 (inputs #1 and #5 should be from
the same source, even though there's no video present yet). After subsequent
power-ups, the Switch will display whichever inputs were selected by the
outputs when power was most recently removed.
5. Plug in and turn on all devices attached to the switch. If the Switch displays
what it should at its output monitors, you can proceed to the following steps.
If it doesn't, check the rear-panel LEDs to make sure the Switch is ON; check
your devices and make sure they're ON; and check your input and output
cabling and make sure it's all properly connected. If everything seems like it
should work but the system still doesn't display video correctly, call Black Box
Technical Support.
6. Serial control and/or dual-head video only: Attach the male end of a DB9 male-to-
female serial cable such as EDN12H-MF to either of the DB9 female
connectors labeled "KEYPAD A" and "KEYPAD B" on the Switch's rear panel.
(Refer to the Appendix for the pinout of these connectors.) Attach the
female end of this cable to the serial port on a terminal, a PC running a
terminal emulator such as HyperTerminal™, or some other RS-232 device
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