Symmetricom 1100 User Manual

Chapter 6 Maintaining and Troubleshooting the TimeProvider

Error messages appear on the console as they occur, and include the time and date 
of occurrence. Refer to the event codes described in 

 and to the alarm 

codes described in 

You can remove the IMC or the IMC/TPIU from the shelf and replace it without 
affecting outputs. 

1. Save the contents of the IMC memory in an IOC by issuing the following 

command:

CPY-MEM:::::IMC,IOC,IMC;

This command may take more than two seconds to execute; if it does, then the 
In-Process response is issued. See the TimeProvider TL1 Reference Guide for 
more information on the CPY-MEM command.

2. Attach a wrist grounding strap and connect it to the TimeProvider chassis.

3. Remove the IMC by loosening the captive screws and pulling the IMC from the 

shelf using the U-shaped handles. 

Major

Red
Off

Major system alarm
No alarm

Minor

Yellow
Off

Minor system alarm
No alarm

Alarm Cutoff (ACO)

Green
Off

On
Off

Antenna Power 
(IMC/TPIU only)

Green
Red
Off

Internal TPIU is communicating with Antenna 
Internal TPIU has lost communication with Antenna
GPS is disabled

Antenna Signal 
(IMC/TPIU only)

Green
Red
Off

Antenna is communicating with the internal TPIU
Master shelf is powering up
Antenna has lost communication with the internal TPIU

Warning: To avoid possible electrostatic damage to the IMC, 
place it in a static-free bag or on a static-free surface.