Second Serial Talker Or T1 / E1 (87-8047) - Symmetricom XLi User Manual

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Second Serial Talker or T1 / E1 (87-8047)

The Second Serial Talker or T1/E1 module is multi-function, and user configurable to provide one of
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three signal types on the output ports:
- Serial Talker: re-broadcast or replication of the standard XLi serial port transmit data
- T1: 1544 kbps frequency
- E1: 2048 kbps frequency
The selection of the signal type is made with on-board jumpers. LEDs mounted to the rear panel identify
the signal selected.
Serial Talker, E1 or T1 mode selection
T1 OUTPUT
When configured for T1 or E1 outputs, and XLi or XLi SAASM is configured with an appropriate high
stability oscillator option (OCXO, high stability OCXO, Rubidium and High Stability Rubidium) and locked
to a GPS reference (or equivalent), the requirements of ANSI T1.101-1994 and ITU-T G.811 pertaining
to primary reference source operation are met.
Frequency:
Interface:
Synchronization:
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1544 kbit/s
Balanced, RS-422 levels into 120
Phase locked to the clock 10MHz
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Ω
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XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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