Installing The Clock Module; Operational Check; Factory-Set Positions For S1 And S2; Indicator Status - Symmetricom TSG-3800 Series User Manual

CPU, Frame Generator, and Clock Modules
Clock Module
Verifying the Default Switch Settings
Clock modules are equipped with two 4-section switches labeled S1 and S2. All
sections of switches S1 and S2 are set to factory-specified positions and should not
be changed. Before installing the module, verify that switches S1 and S2 are in the
proper positions as shown in
Table 6-11. Factory-Set Positions for S1 and S2
Clock Type
Stratum 2E
Stratum 3E

Installing the Clock Module

The Clock module must be installed in slots 6–10 or slots 11–15 of the TSG-3800
main shelf. Each Clock module is five slots wide. See
Modules, on page 61. If you are using clocks of differing quality, install the
higher-quality Clock module in slots 6–10.

Operational Check

Perform the following operational checks after installing the Clock module in the
main shelf. It is assumed that power has been connected to the shelf and is turned
on, and that there is a CPU module installed and functioning properly. A proper
external reference signal must be connected to the corresponding connector on the
rear panel of the main shelf. If used, the fault signal should also be connected to the
main shelf.
1. Verify that the POWER indicator is lit.
2. Verify the module is receiving the proper input signals by observing the
indicators, as shown in
Table 6-12. Indicator Status
Indicator Name
POWER
LOCKED
SELECTED
EXT REF
HOLDOVER
END OF RANGE
184 TSG-3800 User's Guide
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Table 6-11.
S1 Settings
OFF, ON, ON, ON ON, OFF, ON, ON
OFF, ON, ON, ON ON, OFF, OFF, ON
Table 6-12.
Status
On
Off
On or Off
Off
Off
Off
S2 Settings TB1 Setting
A-B
B-C
Slot Location and Keyed
12778474-002-2 Revision F – March 2004