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MT56DSU-R Owner's Manual
LOOPBACK CABLE
DESCRIPTION
This cable lets you test the MT56DSU-R when a second DSU is not
available. It tests the DSU by having the DSU generate a signal,
then the cable “loops’” the signal back to the DSU for comparison to
the original signal sent. You can order this cable (CADSURLB) from
Multi-Tech, or build one using the instructions below. Refer to
Chapter 4 for test procedures.
SCHEMATIC
BUILD INSTRUCTIONS
1.
Strip cable insulation 3/4" .
2.
Cut wires 2, 5, 6, 7,9 off.
3.
Strip wires 1, 3, 4 and 8 a 1/4"
4.
Solder wires 1 and 8 together.
5.
Solder wires 3 and 4 together.
6.
Cover solder connections with 1"of shrink tube.
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