Rs-422 Selective Rate Clock Module - Symmetricom TSG-3800 Series User Manual

RS-422 Selective Rate Clock Module

The RS-422 Selective Rate Clock module (12578512-000-1) provides 10
independent output ports ("A" in the port select display indicates port 10). You can
select the desired port by pressing the port select button on the front panel. Each
port is programmable with up to 512 frequencies. From 8 kHz to 4 MHz you can set
the frequency in 8 kHz increments. From 4 MHz to 4.096 MHz you can set the
frequency in 16 kHz increments. You change the frequency by pressing the CNT UP
and CNT DWN buttons on the front panel, and you select the desired frequency by
pressing both buttons at the same time for approximately two seconds.
illustrates the module front panel.
This distribution module is normally paired with a second RS-422 Output module. In
this configuration, the outputs from both modules are tied together to form 10
redundant output signal pairs. When redundant modules are installed and the
frequency is changed on one module, the redundant module turns its output off,
changes to the new frequency and locks in phase with it, and then turns its output
back on.
12778474-002-2 Revision F – March 2004
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Output Modules

RS-422 Selective Rate Clock Module

Figure 7-15
TSG-3800 User's Guide 251