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4 Operation
MiLLennium GPSCard and Enclosures Guide to Installation & Operation 27
C:\GPS>copy boot1.txt com1
1 files(s) copied
C:\GPS>
4. The receiver is now initialized with the contents of the BOOT1.TXT command file, and logging is directed from
the receiver’s COM2 port to the remote terminal.
MICROSOFT WINDOWS 3.1 OR HIGHER
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 boot-file on a PC, and send it to the receiver. It is assumed that the
PC’s serial port COM1 is connected to the receiver’s COM1 port, and that a remote terminal is connected to the
receiver’s COM2 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 receiver 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. From the Transfer menu, use the Send text file selection to locate this file to be sent to the receiver. Once you
double-click on the file or select Open, HyperTerminal will send the file to the receiver.
The above example initializes the receiver 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 receiver COM1
port at intervals of once every 15 seconds, whereas the GPRMB and GPVTG NMEA logs have been set to be logged out
of the receiver COM2 port at intervals of 15 seconds and offset by five seconds. The RCCA log has been set to output
every 60 seconds from the receiver COM2 port.