Dear Andy, Wolf, LF Group,
But what effect does an error in the bit
clock have, i.e. if the period of each bit is not exactly 32ms?
Cheers, Jim Moritz
73 de M0BMU
…As PSK31 uses differential coding, it is the phase change
over the 32ms signalling period due to freqeuncy error that is important.
If for BPSK, we need to maintain the phase to less than 90 degrees to remove
the ambiguity, so 90/360 / 32ms = 7.8Hz freq error permissible.
For
noisy signals, the determination of correct phase becomes worse, so error rate
will progressively worsen with tuning error.
