If the transmitter is switched off, we get bit.tlow == hw.freq / 20, so adjust test for reception errors.
If the transmitter is switched off, we get bit.tlow == hw.freq / 20, so adjust test for reception errors.

Note that this is the test to see if the receiver is off, we indeed get all 0s on the input pin because of auto adjusting of the hardware.

rene0/dcf77pi,rene0/dcf77pi