User`s manual

OpenTracker USB User’s Manual 17
Save – When enabled, the tracker will save its last-known GPS position as a
permanent fixed position if the GPS fix is lost. This may be used in the case of a
temporary weather station where a GPS receiver is installed only during setup
and is removed to conserve power. The system must remain powered on for 30
seconds after GPS fix loss before the position is saved.
Waypoint Output – Enabling the waypoint output option causes the tracker to
parse received APRS positions and output them over the serial port at 4800 baud.
Waypoints are provided in both NMEA 0183 format ($GPWPL sentence) and
Magellan format ($PMGNWPL sentence).
Length Limit – Some GPS receivers are not capable of display the full 9
characters required for APRS call signs and object names. Setting this option to a
smaller number causes the tracker to intelligently truncate the name of the
waypoint. Spaces and dashes are eliminated first, and if further truncation is
required, characters are dropped from the left first. This prevents stations with
different SSIDs from conflicting – for example, with a limit of 6 characters,
KB6YUO-12 and KB6YUO-6 would be truncated as 6YUO12 and B6YUO6
respectively.
Use Custom Symbols - Enables the use of custom symbols if they have been
uploaded to a compatible Garmin GPS receiver (using the Garmin xImage
utility).
Range Limit - When enabled, waypoints will only be created for stations and
objects within the specified range.
Enable Counter – This checkbox enables the digital counter function. When this
function is enabled, the tracker will no longer transmit immediately when X1 pin
4 is shorted to ground. Instead, it will increment a counter and include the
current count in the status text, e.g., ‘CNT00001’. The maximum count is 65535,
after which the counter rolls over to zero. This option can not be used
concurrently with profile switching with the ‘jumper’ option.
Reset on Transmit – Setting this checkbox causes the counter to reset with every
transmission. Hence, the count reported is the number of events since the last
transmission.