Configuration - Symmetricom XLi User Manual

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A transmit-only Display port on the FTM card can drive multiple remote displays. This RS-422 (optionally
RS-232C) serial port broadcasts Time Deviation, Frequency Deviation, System Frequency, Local Time,
and System Time to Symmetricom addressable displays capable of displaying 12 or more characters.

Configuration

The following is a list of features that can be configured by the user. "Keypad" indicates the parameter
can be set from the XLi's front panel keypad using F27. "Command Line" indicates the parameter may
be set from the XLi's serial or network port using F27.
Parameter:
Line Frequency
Time Deviation Preset
Display port RS-422 setup
Display port Data Addresses
User Serial Port Data Format
FTM RS-422 Display Port
The display driver is an RS-422 port located on the FTM card rear panel. For the RS-232 option Pin 3 is
Transmit and Pin 5 is ground for the DB-9 connector. The RS-422 pinouts are as follows:
DB-9P DATA DB-25P ADAPTER
PIN # DIRECTION SIGNAL
1 OUT TxD-
2 OUT TxD+
3 IN RxD+
4 IN RxD-
5 -- GND
6 OUT RTS-
7 OUT RTS+
8 IN CTS+
9 IN CTS-
The port is a transmit only port. Transmitting characters to this port has no effect on port operation.
System Frequency, Frequency Deviation, Time Deviation, System Time, and Local Time data is
transmitted once-per-second, with a terminating <etx> character on time with the second
(±1 millisecond).
Each of the five data items is preceded by a three-digit address for use by Symmetricom addressable
displays. These addresses can be entered via keypad F27 under the "Display Port Data Address Setup"
selection.
XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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Selectable from:
Keypad
Keypad, Command Line
Keypad
Keypad
----------, Command Line
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2
1
5
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