A new feature has been enabled for the Voice Synthesizer on PSAT2 in addition to DTMF grid and DTMF messaging to voice. Now the voice synthesizer is also listening for APRS-to-Voice messages as well. Here is how to use it
1) Remain on the 145.980 uplink and 145.825 downlink for DTMF 2) Using an APRS radio, send an APRS message to PSAT-SAY 3) Begin the first 10 chars of the message with CCCCCC sez 4) Followed by the text to be spoken. 5) CCCCCC is your callsign right-padded with spaces.
The satellite should ACK the packet uplink and then speak the text. You can tell if APRS-to-Voice is enabled if this 1 bit is on: XXXX0010. Usually the DTMF bits are also enabled so the telemetry will usually show as 11010010.
To do both DTMF and APRS-to-Voice at the same time, the Basic Stamp processor has to check both the DTMF decoder and the packet decoder and so there is a finite chance that a perfectly good uplink might be missed So, just try again.
See http://aprs.org/psat2.html Tomorrow I will add this feature to the users manual and post it.
Enjoy, Bob, WB4APR