re: [amsat-bb] PSK-31 satellite

[Bob Bruninga <bruninga@xxxxxxxx>]

On Mon, 5 Mar 2001, OJ Lougheed wrote:

> ... It seems that in the PSK world one must have a 200+ MHz CPU to
> run ... PSK.... That CPU can certainly track sats and even be programmed
> to send special codes (how to decode them at the sat?) to turn the sat
> on, switch modes, housekeeping and control stuff... In a 4" cube? Power
> budget... power budget... power budget.

That's true.  We wouldn't use any on-board PSK-31.  The PSK-31
transponder is just a transponder.  Telemetry and Control would use either
AX.25 or TTones or Subaudible tones decoders.  See my CUBESAT page below
for how a KPC-3+ TNC can be made to fit in a CUBESAT.  It has built in
analog telemetry and command switches...  In fact, our PCsat also has no
CPU on board other than a KPC-9612.

de WB4APR@amsat.org, Bob

PCsat Design        http://web.usna.navy.mil/~bruninga/pcsat.html
CUBESAT Designs     http://web.usna.navy.mil/~bruninga/cubesat.html
APRS LIVE pages     http://web.usna.navy.mil/~bruninga/aprs.html
APRS SATELLITES     http://web.usna.navy.mil/~bruninga/astars.html
MIM/Mic-E/Mic-Lite  http://www.toad.net/~wclement/bruninga/mic-lite.html

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