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Combined 900MHz RC Tx and data modem, plugs into buddy cord from Tx and USB to laptop for GCS. Eliminates the 72MHz or 2.4GHZ receiver and transmitter.

Posted by Greg Gibbons on April 9, 2009 at 8:33am

Combined 900MHz RC Tx and data modem, plugs into buddy cord from Tx and USB to laptop for GCS. Eliminates the 72MHz or 2.4GHZ receiver and transmitter.

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Comments

  • Rana April 18, 2010 at 7:37pm
    Really great job done, Greg !, Its amazing !, Hats off to you for such a nice accomplishment !
    What is the performance of this system ? I mean there are many many data types being transmitted by the airborne plane to the ground station and you have limited data throughput, how you have managed ?
  • Greg Gibbons April 13, 2009 at 11:10am
    David, I use a dipole for now, for long range I'll use a yagi. The Digi 900MHz modem is a 1 watt tranceiver, 40 mile LOS range at 9600 baud, shorter at 115.2K baud.
  • Greg Gibbons April 13, 2009 at 11:06am
    Good point Jack, the cable is a pain. Why didn't I think of that? Again the KISS principal reins. I'll make the changes to the next round of hardware redesigns.
  • Jack Crossfire April 13, 2009 at 10:11am
    Tethering a transmitter to a data modem? Always wondered why the pros did that when they could just take the original RC receiver & tether it to the data modem. The cost of a bunch of servo cables would be covered by the freedom to roam & not have to support different buddy box protocols.
  • David Low April 13, 2009 at 8:32am
    thx greg~
    what antenna u used in ur gcs?
    dipole or patch or yagi?
    i am using dipole antenna for my 2.4ghz xbee modem(ground and plane) but their performance is bit disappointing.
  • Greg Gibbons April 13, 2009 at 6:57am
    Try here for high gain 900MHz antennas, http://www.antennafactor.com/Products/ or here http://www.digi.com/products/accessories/antennas/whip-antennas.jsp
  • David Low April 13, 2009 at 3:02am
    hi greg,
    any idea where to get 900mhz high gain antenna?
    thx
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