3.
Terminal applications
All terminal applications are activated by using the up/down arrow keys to highlight the desired
option, then pressing Enter. To quit an application, use the Control-Q keyboard combination.
3.1 Configuration
The U4B Configuration screen is where the basic configuration of the U4B tracker and the QRP
Labs WSPR tracking system is specified.
Callsign:
Here you enter the callsign for the flight. This must conform with WSPR protocol callsign
rules! Specifically:
•
Must be 4-6 characters (longer callsigns cannot be sent using WSPR)
•
One or two characters which must consist of A-Z or 0-9
•
Next character must be a number, 0-9
•
Two or three more characters which must be A-Z
Select the callsign field and type your callsign in. There is no need to add blank spaces at the end;
you cannot use the arrow keys to fix a mistake, just use the backspace key and re-enter the
callsign.
Band:
the amateur band for WSPR tracking telemetry. 20m is most popular for balloon tracking
and is recommended. With the left and right arrows you can choose the operating band.
Channel:
The QRP Labs tracking system uses 600 channels numbered 0 to 599. Each U4B
tracker is uniquely assigned three possible channels to use. You can choose which of the three
possible channels to use.
Autostart program:
The name of the program, which must be in the root directory, to run
automatically at power-up when there is no USB connection. When the USB cable to the PC
U4B operating manual Rev 1.00
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