User`s manual

Tracker3 User’s Manual 27
useful for applications like high altitude balloons that may lose GPS lock after
landing, but still need to transmit to be found.
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 digipeater or 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 the CT
pin on the terminal block (OT3m only) 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.