Novatel DL-L1 GPS Receiver User Manual


 
Appendix J Command Prompt Interface
DL User Manual Rev 3 91
1. Open a text editor on the PC and type in the following command sequences:
log com2 sata ontime 15
log com2 etsa ontime 15
log com2 rvsa ontime 60 5
log com2 posa ontime 15
log com2 dopa ontime 15
2. Save this with a convenient file name (e.g. C:\GPS\BOOT1.TXT) and exit the text editor.
3. Use the DOS copy command to direct the contents of the BOOT1.TXT file to the PCs COM1 serial port:
C:\GPS>copy boot1.txt com1
1 files(s) copied
C:\GPS>
4. The DL is now initialized with the contents of the BOOT1.TXT command file, and logging is directed from the
DLs COM2 serial port to the remote terminal.
WINDOWS
As any text editor or communications program can be used for these purposes, the use of Windows 95 is described only
as an illustration. The following example shows how Windows 95 accessory programs Notepad and HyperTerminal can
be used to create a hypothetical waypoint navigation file on a PC, and send it to the DL. It is assumed that the PCs
COM1 serial port is connected to the DLs COM1 serial port, and that a remote terminal is connected to the DLs COM2
serial port.
Example:
1. Open Notepad and type in the following command text:
setnav 51.111 -114.039 51.555 -114.666 0 start stop
magvar -21
log com1 posa ontime 15
log com1 spha ontime 15
log com1 nava ontime 15
log com2 gprmb ontime 15 5
log com2 gpvtg ontime 15 5
log com2 rcca ontime 60
2. Save this with a convenient file name (e.g. C:\GPS\BOOTNAV1.TXT) and exit Notepad.
3. Ensure that the HyperTerminal settings are correctly set up to agree with the DL communications protocol; these
settings can be saved (e.g. C:\GPS\OEMSETUP.HT) for use in future sessions. You may wish to use XON / XOFF
handshaking to prevent loss of data.
4. Select Transfer | Send Text File to locate the file that is to be sent to the DL. Once you double-click on the file or
select Open, HyperTerminal sends the file to the DL.
The above example initializes the DL with origin and destination waypoint coordinates and sets the magnetic variation
correction to -21 degrees. The POSA, SPHA, and NAVA logs have been set to output from the DL COM1 serial port at
intervals of once every 15 seconds, whereas the GPRMB and GPVTG NMEA logs have been set to be logged out of the
DL COM2 serial port at intervals of 15 seconds and offset by five seconds. The RCCA log has been set to output every
60 seconds from the DL COM2 serial port.