Comtech EF Data DMD1050 - Manual (Page 73)

MN-DMD1050 5–1
Revision 9
Chapter 5. Maintenance and
Troubleshooting
5.1 Periodic Maintenance
The DMD1050 does not require periodic maintenance.
5.2 Troubleshooting
Should a unit be suspected of a defect in field operations after all interface signals are verified,
the correct procedure is to replace the unit with another known working DMD1050. If this does
not correct the problem, wiring or power should be suspect.
The following is a brief list of possible problems that could be caused by failures of the modem or
by improper setup and configuration for the type of service. The list is arranged by possible
symptoms exhibited by the modem.
Symptom Possible Cause
The Modem will not acquire the
incoming carrier:
There is an improper receive input to modem.
The Receive Carrier Level is too low.
The Receive Carrier Frequency is outside of the acquisition range.
The Transmit Carrier is incompatible.
Modem is in Test Mode.
The Async Port is not configured
correctly.
The switches may not be set in the correct positions.
CAUTION
The DMD1050 contains a Lithium Battery. DANGER OF EXPLOSION exists
if the battery is incorrectly replaced. Replace only with the same or equivalent
type recommended by the manufacturer. Dispose of used batteries in
accordance with local and national regulations.