[amsat-bb] Re:New Sat - FM multiplex?

[A Thomas <70374.440@xxxxxxxxxxxxxx>]

Thinking this a bit further (see my previous post)  the operating  sequence
would be:

1       ground station sends [APRS packet or other digital identifier] on
Frequency 1 (1st uplink) to "register"

2       Satellite listens on this for {APRS packet} and when it hears the
correct "registration" it sends [APRS packet] back on   Frequency 2
downlink indicating that the second uplink frequency is open for 10 seconds
for that caller only. At the    ground station a red LED glows while that
station has the satellite.

3       Ground station sends [APRS packet] prefix and voice message up on 
frequency 3 (second uplink) and hears   him/herself coming back on
frequency 2 (downlink).

        If any other ground station calls on frequency 3 it won't get into
the satellite - however hard the wolf huffs and puffs -         unless the
wolf prefixes his call with someone else's [APRS packet] which is illegal.

4       Meanwhile someone else has "registered" with  frequency 1 and the
satellite ends the relay with a {APRS packet}   swithching him/her on.

ponderous? could be quite quick throughput. Unless the wolf hogs frequency
1 in which case he will have no one to talk to. And he can't broadcast
because he's only got 10 seconds.

andy G0SFJ
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