GPS Transmitters

Frequencies:

  • The 2 meter and 70 centimeter devices transmit on amateur radio frequencies and require a license to operate.
  • The 900 Mhz transmitter uses an FCC approved device.  No license is required.

Data Format:

  • The 2 meter and 70 centimeter devices send standard APRS datapackets at 1200 baud.  Packets can be received and decoded using industry standard receivers
  • The 900 Mhz device uses a proprietary format.  Packets can be received and decoded using a matching 900 Mhz receiver provided by BigRedBee, LLC

GPS:

  • All devices use the u-blox MAX-7 GPS module.  These modules are proven to maintain lock  at altitudes over 100,000 feet.

Output Power:

  • 2M:  5 watts
  • 70cm:  100mw
  • 900Mhz:  250mw

Power Supply

  • The 70cm and 900 Mhz transmitters are powered by an optional 900 mAh single cell LiPo battery
  • The 2M transmitter has a voltage input range of 4.0 to 9.0 volts.  The automotive version has an external linear regulator that allows operation from 8.0 to 16.0 Volts

On Board memory

  • All transmitters have an integrated non-volatile memory that records waypoints for 2+ hours at 1 Hz (user programmable) for later download to a KML file that can be viewed in Google Earth