[amsat-bb] Re: ANDE-2 Deployment

Ivan Galysh ivan.galysh at nrl.navy.mil
Wed Jul 29 10:49:53 PDT 2009

Sorry, deployment is Thursday. A standard AX.25 TNC will work. FX.25 
wraps error correction data around the packet. I'll get info on the FX25 
decoder up real soon.


Nigel G8IFF/W8IFF wrote:
> OK, so presumably a standard AX25 TNC in kiss or RAW data mode and FX25 
> error correcting software to post process the data?
> Looks as though the deployment from the shuttle didn't go ahead. They've 
> been doing engine burns during the past minutes.
> jmfranke wrote:
>> No he means FX.25:
>>> From the Milcom/BTown blogs:
>> "The communications board contains the transmitter and receiver. The 
>> transmitter operates at 2 meters and can put out up to 1 watt of 
>> signal. Power level is adjustable. The transmitter can operate at 1200 
>> baud AFSK and 9600 baud FSK. The transmitter uses the AX.25 protocol. 
>> An experimental FX.25 protocol will be tested that adds forward error 
>> correction capability to the AX.25 protocol and still allows typical 
>> TNCs to decode the packets.
>> John
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