Functional Description; Indicators On The Composite Clock Input Module - Symmetricom TSG-3800 Series User Manual

Table 5-1 describes the indicators located on the front panel of the CC Input
module.
Table 5-1. Indicators on the Composite Clock Input Module
Indicator
POWER Green
REF Green
LOS Red
FAULT Red
The CC input signal is accessible at the front panel MONITOR jack and is available
whenever an input signal is present. This monitor is isolated from the input by
860 Ω.

Functional Description

Figure 5-2 is a block diagram of the CC Input module. The CC Input module extracts
clock and data from the CC input signal. A divide-by circuit reduces the input signal
to 1 Hz. A Phase Detector then measures the phase between the CC input signal
and the system clock over a 1 second interval.
12778474-002-2 Revision F – March 2004
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Color
On = Power is applied.
On = The oscillator is phase locked to the input
reference applied to this module.
On = Loss of Signal.
On = Module Failure
Composite Clock Input Module
Description
TSG-3800 User's Guide 141
Input Modules