Symmetricom XL-GPS, User Manual

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Using the Command Line Interface
- GPS time is derived directly from the GPS constellation and doesn’t contain any
leap-second adjustments or other GPS-to-UTC corrections.
- Standard Time is UTC plus a time zone offset. For example, Pacific Standard
Time is UTC minus 8 hours.
- Local Time is UTC with a time zone adjustment and a daylight saving time
adjustment.
Using the Command Line Interface
The next two sections show how to connect to the XL-GPS using the serial and network
ports. Both Serial I/O and the network port give the user access to the command line
interface. While the keypad interface provides a simple menu-driven user interface, the
command line interface features:
• Additional functions that aren’t available through the keypad
• Remote accessibility over a network through the standard network port
To use the command line interface, refer to the explanations and examples in the ‘Command
Line’ subsections for each function.
Connecting to the Serial Port
Complete the following steps to set up and use the Serial Port to communicate with the XL-
GPS.
Verify that the XL-GPS’s serial port settings are as follows: (Keypad:
ENTER–4–ENTER
.
Use
the UP/DOWN ARROWs.)
• Serial Port – RS232
• Baud rate – 9600
• Data bits – 8
• Parity – NONE
• Stop bits – 1
Note: Parity set to NONE is only valid when Data Bits is set to 8.
Connect a null-modem cable from the PC’s serial port to the XL-GPS’s “SERIAL I/O” port.
If needed, configure your PC’s terminal emulation program to match the serial port settings
above (9600, 8, N, 1). Set Flow Control to “None”.
One terminal emulation program, HyperTerminal, is usually found in Microsoft Windows
under
Programs – Accessories or Programs – Accessories – Communications .
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