Many thanks again also to Rik, Ian, Stefan, Mauro, Ewald for your fine observations and suggestions, both on behalf of Ralph and from myself. I can say that we are overwhelmed by the number of positive responses.
Yes some type of subaudio ID on the carrier would surely make sense. I had thought of a phase modulation scheme (perhaps similar to the 162 kHz timecode), but at this speed it may have a negative impact on synchroneous AM demodulators which use a PLL to regenerate the
carrier. A very slow (several seconds) but characteristic frequency modulation may indeed be the best option.
Best 73,
Markus
-----Ursprüngliche Mitteilung-----
Von: Mauro Giroletti <
[email protected]>
An: rsgb_lf_group <
[email protected]>
Verschickt: Sa, 10. Nov. 2018 16:35
Betreff: R: RE: LF: 1476 kHz AM
