Hi, I have this 74HC943 modem IC and I want to determine, if there will be any tone presented on it's TXA pin, when there is no data transmitted
I am interested to find this out in both, originate and answer modes setting (pin 13).
I am confused a bit on how this bell103 works, does it present a tone in the channel even when no data is transmitted or it keeps the channel silent?
HAM radio software (RTTY), seems to transmit a sequence of a character, just to keep the channel open when there is no data sent.