User`s manual

Device Overview and Specifications
• The RTrak-HAB is the first APRS tracker designed specifically for the high
altitude balloon community. We have worked closely with HAB enthusiasts to
include all of the features needed for a truly versatile payload.
OpenTracker 1+: The data modem section of the RTrak-HAB is based on the SMT
OpenTracker 1+ platform. The OpenTracker was designed and
programmed by Scott Miller N1VG of Argent Data Systems. The
OT1+ platform is fully open source and a perfect match for the
RTrak-HAB tracker. Firmware upgrades are free for download.
Compernicus GPS: The GPS receiving chipset used in the RTrak-HAB. This GPS is a
Sirf-Star III receiver with a fast <60 sec cold start lock time,
measures only 20mm x 20mm in size and runs on a 3.3V operating
voltage. The primary reason for using this GPS is the ability to
track ABOVE 60,000 feet in altitude.
MX146LV TX: The MX146LV VHF transmitter is a fully programmable 350mW
transmitter and is frequency agile from 144-148 MHz. This
module is temperature compensated for stabilization and makes it
perfect for an HAB environment where constantly changing
ambient temperatures can cause less capable transmitters to drift
off of frequency.