U4B
U4B – Ultimate4 Balloon tracker
Operating manual
Important information
This is the operating manual for the U4B and should be read in conjunction with the relevant
hardware manual. On the U4B page
there are other helpful documents
and video links.
This operating manual contains a comprehensive description of everything in the firmware. It might
be a little overwhelming. However, remember that U4B is both extremely simple, extremely
complex, and everywhere in between – whatever you want it to be.
For the simplest possible flight, a basic tracking application program is already installed. The
following steps will get your U4B tracker ready and tracking set up:
1. Connect a micro-USB cable between U4B and your PC; run a terminal emulator on the PC
(see section 2 of this manual) and connect to U4B
2. Enter your callsign in the U4B configuration screen (see section 3.1 of this manual) and
make a note of the channel number
3. Set up your flight tracking in the QRP Labs shop account (see section 5 of this manual),
which will give you a tracking map page at http://qrp-labs.com/tracking
4. Assemble your system hardware (refer to the hardware manual) – consisting of U4B, GPS
antenna (twisted #28 wire), HF (e.g. 20m) antenna, solar cells and small LiPo battery
5. Test thoroughly on the ground, before snapping off the USB connector tab along the line of
holes (refer to hardware manual)
6. Remember: SAFETY first (refer to hardware manual), then select your launch site, launch
day (good weather!), inflate your balloons (refer to documentation at
) and fly!
Contents
1. Introduction.................................................................................................................................................................3
2. Terminal connection....................................................................................................................................................4
U4B operating manual Rev 1.00
1
