Argent Data Systems OpenTracker USB User Manual page 16

OpenTracker USB User's Manual 14
Symbol Table and Symbol Code – These settings control the symbol used to
indicate the station's position when drawn on a map. See Appendix B for a
listing of available symbols.
Temp. Adjust – Calibration offset for onboard temperature sensor. The sensor
used on the OpenTracker is fairly linear across its operating range and requires a
single-point calibration. The easiest way to accomplish this is to set a
thermometer next to the tracker. Subtract the temperature reported by the tracker
from the temperature shown by the thermometer, and enter that value in this
field. For example, if the thermometer shows the temperature as 26°C and the
tracker reports 29°C, enter –3 for the adjustment value.
Quiet Time – This setting determines how long the channel must be clear before
the tracker will transmit. Each unit is approximately 1/56 second. Setting the
quiet time to zero causes the tracker to ignore detected traffic.
Text – This is a freeform text field. Anything entered here will be displayed in
the comment portion of the transmission or in a separate status packet, as
selected. Keep comments as brief as possible to avoid wasting channel capacity,
or use the 'Every __ Transmissions' option to reduce how often the text is sent.
Altitude, Course/Speed, Time – When checked, report these values as indicated
by the GPS receiver. The timestamp may be in Days/Hours/Minutes or
Hours/Minutes/Seconds.
DAO – Enables the proposed !DAO! APRS extension to provide the map datum
used and an extra digit of latitude and longitude resolution. May not be
supported by all APRS clients. The datum is always reported as WGS84, which
is the standard for normal APRS operation.
GPS Quality – Report number of satellites in use and horizontal dilution of
precision information as reported by the GPS receiver.
Temperature – Report temperature as indicated by the onboard temperature
sensor in the comment field, in degrees C. Not affected by the Metric / English
setting.