Patton electronic 1180 User Manual

Page 8

SYMPTOM

PROBLEM

SOLUTION

APPENDIX A

TROUBLESHOOTING

LEDs do not light
when AC power
transformer is
plugged into wall

Carrier Detect (CD)
LED is

low

Carrier Detect (CD)
LED is

high

, but

1180s are not
communicating

Loose power
connection

Outlet is defective

AC power cord is
defective

AC transformer is not
plugged into the Model
1180

If CD is low, possible
synchronization loss

Test Mode switch is in
the wrong position

DIP switches are set
improperly

Fiber link is connected
improperly

RS-232 connections
are faulty or cables are
pinned wrong

Make sure the AC
connection is flush

Try a different outlet

Remove the cord from
the outlet and check for
continuity

Plug transformer into
Model 1180

Check for ongoing
power loss or break in
fiber if CD does not go
high within 60
seconds

Make sure the Test
Mode switch is set to
NORMAL on both
Model 1180s

Check all DIP switch
settings, esp. Reset
and Data Rate,
against Section 3;
make sure both Model
1180s are configured
the same way

Check the ST or SMA
connection on the back
of both Model 1180s

Check RS-232 cable
continuity and pinning

SYMPTOM

PROBLEM

SOLUTION

Data passes, but
hardware flow
control doesn’t
work

Model 1180s work
in async. mode,
but not sync. mode

Incorrect DIP switch
setting

Switch 7 must be in the
ON condition for
hardware flow control
signals to pass
between Model 1180s;
both units must be set
the same way

Switch 8 (internal/
external clock) must be
set the same way for
both Model 1180s