Micro-Trak All-In-One APRS Transmitter
Hardware version 3.2
The MT-AIO is a self-contained, water resistant
APRS transmitter/GPS receiver designed for portable
use. The MT-AIO is computer programmable, and
frequency agile over the entire 2 Meter ham band.
Operation beyond 2 Meter bandwidth limits are not
supported, since the device is not FCC approved for
use outside the ham bands. Agencies exempt from
FCC requirements may contact us about out of band
operations. The device is rugged, and intended for
operation using 8 conventional AA batteries or other
battery packages available locally that do not exceed
13.6 volts. Although the MT-AIO is water resistant,
and uses door gaskets, and O-rings to maintain water
resistance, it is not designed to be submerged.
The MT-AIO is a transmitter only, and may send
packets coincidentally with other transmitters. We
recommend using the MIC-E format (default) with this transmitter, since shorter packets
tend to have a higher throughput, save power, and minimize potentially high RF exposure
levels.
The MT-AIO is controlled by a special version of the TinyTrack 3 chip, and retains most,
but not all, of the special functionality of the TT3. Features intended primarily for HF
operation have been omitted, for instance. Special features of the MT-AIO include a
power saving mode that switches the GPS on and waits for a locked GPS position before
sending a transmission. Since the MT-AIO draws only a few milliamperes in the standby
mode, battery life can be extended to days or weeks, depending upon the transmission
rate selected and other parameters, including the type of data packet sent.
Power output of the Micro-Trak AIO is adjustable, and may be dialed down to a few
hundred milliwatts of power or up to as much as 10 Watts. It is shipped set to maximum
power.
Содержание Micro-Trak All-In-One
Страница 9: ...Schematic...
