5.
QRP Labs tracking
You can use the U4B tracker however you like. But the easiest way to use it for tracking a balloon
flight, is using the TELE statement to transmit the QRP Labs telemetry format, and using the QRP
Labs web site to view the live tracking map and download your data. To do this, you need to have
registered a customer account on the QRP Labs shop
Note that it is possible, with limitations, to operate multiple flights with the same callsign, as long
as they are on different channels. However, since there are 30 permutations of channel and band,
which all share the same first (standard WSPR) transmission time and frequency, you have to
ensure that your choice of channels does not cause this conflict. Otherwise reports from your
various different balloon flights cannot be differentiated. This is one more reason why there are
three channels to choose from. You can use the Configuration screen to check this. The
Configuration screen will show, for your choice of band and channel, the frequency and time slot
which will be used. You should make sure that no two of your balloon flights have the same
Callsign AND band AND frequency AND time slot. In this way, one operator can operate up to 20
active flights with the same callsign, simultaneously.
On logging in to your account you will see a section titled “My Balloons” with a link “Modify your
balloon flights”.
U4B operating manual Rev 1.00
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