Phil,
I was using similiar units from Abacom, at first the tx/rx pair and then the am-rtd-315
transceivers. In all cases at 5 volts. The on/off times seemed to be a function
of bit rate and tx power. These radios work by turning the base frequency on and off.
The receiver needs to detect and latch the signal while rejecting noise. I suspect
that obtaing those goals and low cost are opposing forces.
The spec’ed bit rates appear to be under ideal conditions. I tried various schemes at
adjusting the ratio. Was working an a dynamic scheme when project got shelved.
George