Symmetricom 1000 User Manual

Chapter 5 Testing the TimeProvider
Testing Alarm Conditions

150  TimeProvider User’s Guide

When the TimeProvider is in the revertive operating mode, the input reference 
signal reverts to the original input after it recovers from an error condition.

The TimeProvider is in the revertive mode when the QLEVEL parameter for INP1, 
INP2, and PRS inputs are set to different values, and the PRIORITY parameters for 
the same inputs are also set to different values.

To test the revertive operating mode, perform the following steps:

1. Define the revertive mode by setting the QLEVEL and PRIORITY parameters to 

appropriate values. See 

, on page 112, and 

, on page 113, for further information.

2. Provision and connect appropriate reference inputs to the TimeProvider.

3. Create a fault on the selected reference signal and observe that the 

TimeProvider changes to the appropriate secondary input.

4. Remove the fault on the initial reference signal and observe that the 

TimeProvider reverts to the initial reference input. The event log and the LEDs 
indicate that the input is no longer in fault, and that the reference has changed.

To test the ability of the TimeProvider to detect and report problems with the battery 
power, you perform a two-step test:

Connect power to the TimeProvider on both Batt A and Batt B terminals

Remove power from one terminal and observe that the TimeProvider issues the 
appropriate alarm

When power is lost from the Batt A or Batt B terminal, the factory default alarm is 
Major. 

1. Connect the appropriate power supply to both the Batt A and Batt B connectors. 

The TimeProvider enters the Warm-up mode.

2. Remove power from either the Batt A or Batt B terminal. Observe that the Major 

LED on the IMC is red. Verify that a Major alarm is included in the event log.