Chapter 7 Input Module Reference Data
1-Port and 3-Port DS1 Input Modules
174 SSU-2000e User’s Guide 12713140-002-2 Revision E – October 2006
Functional Block Diagram
A simplified block diagram of the 1- and 3-Port Input modules is shown in
Figure 7-3
.
Figure 7-3. Block Diagram of the 1-Port and 3-Port DS1 Input Module
Phase Measurement Averages
The Input module also maintains averages of past phase measurements including:
1000 one-second averages
1000 100-second averages
100 1000-second averages
10 10000-second averages
To account for momentary jumps in phase, the Input module uses a phase buildout
algorithm for phase jumps greater than or equal to 1 microsecond per tenth of a
second. To prevent confusing frequency offsets for phase jumps, the phase build-out
algorithm does not build-out more than eight consecutive samples. If the phase is
built out, the Input module sends an event message to the Communications module.
To Next Page
Loading...
Need help?
General
