[amsat-bb] First DTMF grids via PSAT2

[Robert Bruninga]

PSAT2 is in DTMF-grid-to-voice mode and will remain that way until we find
out how viable this mode is (any radio can uplink, not just APRS radios).

So far the DTMF downlink beacon only shows a few stations i n Brazil have
tried this mode:
PSAT2-1>APOFF::BLNd-DTMF:f|PY5LF0,PU5NOC,PY5LAF,P,,,,,

Uplink is on 145.980.  See how on the PSAT2 page: http://aprs.org/sats.html

Just load your 16digit DTMF string into DTMF memory and transmit (with
radio in narrowband FM and only in the center of the pass with zero
doppler).

Downlink is Voice and APRS packet on 145.825

Bob, WB4APR

On Tue, Jul 23, 2019 at 9:36 AM Robert Bruninga <bruninga at usna.edu> wrote:

> Here is a video PY5LF recorded of his first successful DTMF Grid uplink:
>
> You do not hear his DTMF uplink but you hear the voice response and the
> APRS packet that results:
>
>
>
> https://www.facebook.com/py5lf/videos/2634132619939772/?t=0
>
>
>
> That packet is a 3rd party APRS format for that grid report.  It did not
> get picked up by either the PSAT2 telemetry or USER pages beacause of the 3
> rd party format probably.  Ill see if we can fix that.
>