Multiple transmissions of postamble frames #32
Description
We are apparently transmitting more than one postamble frame at the end of each transmission session. Usually, three of them.
This resembles issue #30, but is apparently different.
My suspicion is that we are not turning the transmitter off at the right time. There's no good way to synchronize the transmitter shutoff with the end of the first postamble frame, so we are pretty much forced to just run a timer for it. Which means allowing more time than required, rather than less, so the frame can be completely transmitted. But two whole extra frame times seems excessive.