Configuration Data - Symmetricom SSU-2000e User Manual

Chapter 6 Clock Module Reference Data
Type I Clock Module

Configuration Data

The Stratum 3E Clock module is software configurable through one of the serial or
Ethernet ports. The default values and the ranges for the configurable parameters
are listed in
Table 6-6. Stratum 3E Clock Default Values and Ranges
Setting
Warmup Time
Min Tau Limit
Max Tau Limit
Min Tau
Max Tau
Clk Switch AR
Input Switch
Input Selection Mode
Local Oscillator (LO)
Frequency Offset
Elevation Time
Type I Clock Module
This section provides operating instructions and software provisioning procedures
for the Type I Clock module (part number 23413015-001-0), designed for use in the
SSU-2000e Synchronization Supply Unit.
Functional Overview
The Type I Clock module uses a quartz oscillator which meets or exceeds the
performance requirements for ITU and ETSI Type I Slave clocks. The Clock module
reads measurement data from the Input modules, provides frequency control of the
oscillator through DDS circuitry, and generates reference signals used by the Input
and Output modules.
A typical SSU-2000e shelf contains dual redundant Clock modules. Each Clock
module maintains phase synchronization with the redundant Clock module. Its
hardware and software also provides an initial offset adjustment and frequency
adjustment resolution of 1 x 10
150 SSU-2000e User's Guide
Table 6-6.
Default
1200 seconds 900-3600 seconds
300 seconds Constant
500 seconds Constant
300 seconds In the range specified in Min/Max Tau limits
450 seconds In the range specified in Min/Max Tau limits
On On/Off
AutoReturn (AR) AR (2)/AS On (1)/ AS Off (0)
Priority Priority (0)/PQL (1)
On On/Off
57 ppb Constant
86400 seconds 60 to 500,000 seconds
-13
Range
or better.
12713140-002-2 Revision E – October 2006