And the ball keeps bouncing.

Congrats!

Reminds me of a conversation I had with Martin Sweeting at an AMSAT meeting in DC about 45+ years ago.  I was showing him a new hi-tech (!) 4 function hand calculator that my college had just purchased ($ 500.+) for use by blind students and suggesting that the new voice synthesizer chip might be placed on a satellite and used for downlink telemetry.  It would of course reduce the data rate from about 3 characters per second (Morse code) to 1 character per second but would greatly expand access to potential users.

Those were the days.

Again, Congrats.

Martin Davidoff (K2ubc)

On Fri, May 28, 2021 at 3:23 AM Yono Adisoemarta via AMSAT-BB <amsat-bb@amsat.org> wrote:

Hi Bob,

Works really good over here several minutes ago, 07:05 UTC pass over Jakarta, Indonesia.

Thanks for the great job,

73 de Yono - YD0NXX

Sent from my iPhone

On May 28, 2021, at 12:05 PM, Robert Bruninga <bruninga@usna.edu> wrote:



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

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Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of AMSAT-NA.
Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/

View archives of this mailing list at
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