Composite Clock Input Module; Functional Overview - Symmetricom SSU-2000 User Manual

Chapter 7 Input Module Reference Data

Composite Clock Input Module

Table 7-10. GPS Input Module Configuration Settings (Continued)
Configuration Setting
MTIE T100K Set Limit 1
MTIE T100K Set Limit 2
MTIE T10 Clear Limit1
MTIE T10 Clear Limit2
MTIE T100 Clear Limit1
MTIE T100 Clear Limit 2
MTIE T1K Clear Limit1
MTIE T1K Clear Limit2
MTIE T10K Clear Limit 1
MTIE T10K Clear Limit 2
MTIE T100K Clear Limit 1
MTIE T100K Clear Limit 2
Composite Clock Input Module
This section provides operating instructions and software provisioning procedures
for the Composite Clock Input module (part number 23413279-000-0), designed for
use in the SSU-2000 Synchronization Supply Unit.

Functional Overview

The Composite Clock Input module conditions a composite clock input signal that is
used to control the frequency of the Clock modules. When the SSU-2000 is in the
Subtending mode, it also produces a 4 kHz synchronization signal, which
determines the phase of the composite clock signals generated by Composite Clock
Output modules. This signal ensures that the phase of the composite clock output
signals follows the phase of the composite clock input reference signal. The module
consists of a microcontroller and firmware, SRAM for data storage, FLASH memory
that contains the firmware, and other support circuitry.
The module monitors and reports module status and conditions. Events are
generated for Loss of Signal (LOS) and Bipolar Violation (BPV) density. Each
module communicates with the Communications module to receive user
configuration commands and to report status and performance for the Clock
modules for frequency control.
184 SSU-2000 User's Guide
Factory Default
1600
2000
230
290
400
490
730
910
790
990
1440
1800
Range
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
0 to 60 000
12713020-002-2 Revision F.01 – January 2007