Patton electronic 1180 user manual Troubleshooting Problemsolution Symptom Solution

SYMPTOM

APPENDIX A

TROUBLESHOOTING

PROBLEMSOLUTION

SYMPTOM	PROBLEM	SOLUTION
Data passes, but	Incorrect DIP switch	Switch 7 must be in the
hardware flow	setting	ON condition for
control doesn’t		hardware flow control

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

Carrier Detect (CD) LED is low

or

Carrier Detect (CD) LED is high, but

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

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

work		signals to pass
		between Model 1180s;
		both units must be set
		the same way
Model 1180s work	Incorrect DIP switch	Switch 8 (internal/
in async. mode,	setting	external clock) must be
but not sync. mode		set the same way for
		both Model 1180s

1180s are not communicating

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

DIP switches are set improperly

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

Fiber link is connected improperly

RS-232 connections are faulty or cables are pinned wrong

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

Check RS-232 cable continuity and pinning

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