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M17-Project / m17-tools

A set of M17 tools
GNU General Public License v3.0
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PTT line timing issue [Windows] #11

Open sp5wwp opened 1 year ago

sp5wwp commented 1 year ago

The line designated for PTT control gets released too early. I'm using Windows. The hardware is a generic FTDI chip with RTS/CTS lines exposed plus a CM6631A DAC soundcard.

In the oscillograms below, channel A is the baseband and channel B is the RTS line:

sp5wwp commented 1 year ago

The result is the EOT and a small portion of the last frame not being transmitted.

Paulo-D2000 commented 1 year ago

Interesting, the behavior here is the opposite... PTT and a small part of LSF doesn't get transmitted while EOT does... I guess that's just the internal radio ptt delay

Paulo-D2000 commented 1 year ago

I've added one fixed 40ms delay before releasing the ptt... see if it works please :)

sp5wwp commented 1 year ago

Will check tomorrow.

sp5wwp commented 1 year ago

I have to check it again after all the recent updates.