Argent OpenTracker, Руководство пользователя

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Use PTT Input – When this checkbox is enabled, the tracker can be connected inline with a
microphone to operate in burst ‐ after ‐ voice mode. A packet will be transmitted whenever the
microphone PTT is released.
PTB2 Output – This checkbox controls the output level of pin PTB2 (jumper JP8). Because this
pin is shared with the spare ADC input, the checkbox is ignored if the ADC input is used. The
output can be used as an indication of the configuration profile currently in use.
Enable Counter – This checkbox enables the digital counter function. When this function is
enabled, the tracker will no longer transmit immediately when JP4 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.
Reset Counter 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.
Counter Rearm – This is a ‘debounce’ delay applied to the counter input. After a counter event
is registered, all subsequent events are ignored until the specified time has elapsed.
Invert Carrier Detect – Usually used with mobile radios, this checkbox indicates that the
channel is busy when the carrier detect input is low.
Suppress PTT Out on PTT In – This option allows the tracker to be used in burst ‐ after ‐ voice
mode without breaking any lines between the microphone and radio. PTT is not asserted by the
tracker until the microphone PTT is released.
Disable Transmit on Low Voltage – To avoid over ‐ discharging batteries, enable this option and
enter the minimum voltage at which the tracker should operate the transmitter.
Allow Transmit Without GPS Lock – Normally, while in GPS mode, the tracker will not
transmit without a valid fix. When this option is selected, the tracker will continue to transmit
its last known position if GPS lock is lost for more than 30 seconds. This condition is indicated
by the text ‘NOFIX’ in the status message. If the tracker has received no valid fix since startup,
no position will be reported. Status text and telemetry packets will be unaffected. This option
is particularly useful for applications like high altitude balloons that may lose GPS lock after
landing, but still need to transmit to be found.
Send Telemetry Packet – Enabling this option causes the tracker to transmit a standard APRS
telemetry packet after each position packet. The telemetry packet contains raw readings from
the three analog ‐ to ‐ digital converter inputs, the low eight bits of the counter, the GPS HDOP
reading, the profile in use, and the status of the jumper input.
OpenTracker Manual - Version 1.05 – 6/25/06 page
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