[amsat-bb] A satellite transponder is a shared resource

Zach Metzinger zmetzing at pobox.com
Sat Dec 10 19:10:33 UTC 2016

On 12/10/16 12:47, Clayton Coleman wrote:
> Often there are portable stations running 5 watts with their Arrow
> antennas. Please, please reduce your CW power. If you are operating CW
> to overcome hearing deficiencies at your station,please consider
> making station improvements rather than taking more of the
> transponder's limited power for yourself.

This is a great example of where a digitally processed (DSP/SDR) 
transponder would excel.

Assuming that any one uplink signal didn't crush a sensitive 
receiver/ADC with good dynamic range, it could process all signals in 
the pass-band and AGC the problematic ones before sending the signal 
back to an output DAC/filter/PA.

I never AO-40, so I haven't experienced LEILA in action, but the idea 
would be similar. "Quieting the alligators"

--- Zach

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