What gives ? i cannot seem to adjust the bandwidth in Any way in FM mode ? am i doing something stupid ?
What, exactly, do you expect to happen to the modulation when you change the bandwidth? FM modulation bandwidth is set by the deviation and the maximum audio frequency allowed. If we reduce the bandwidth below this, your not gonna like the results. If you want lower bandwidth select lower deviation (FM -> NFM) or reduce your audio bandwidth with the EQ. DFM is not fixed as we do not know what audio input will be supplied and we have an expectation that more advanced folks that understand the bandwidth requirements will be touching the dials. The inability to change it is to prevent folks from doing things that will have an adverse effect on output.