3 ms·
> and would require modulation up to RF Can you elaborate? Seems to me it's working without any additional analogue circuitry ...
by rusk 8y ago
> and would require modulation up to RF
Can you elaborate? Seems to me it's working without any additional analogue circuitry ...
- pjc50 8y agoNo, you're right and I'd got my frequency bands wrong, was thinking of 698-806 MHz. 61.5MHz is the broadcast RF band for channel 3, not the baseband. (I've probably spent too much time around modern radio systems and just casually assumed that 61MHz was too low to be useful, oops)
- jdietrich 8y ago30 to 300MHz still has the ITU designation of "very high frequency". I know that these days all the sexy stuff is microwave, but the EM spectrum is useful all the way down to DC. The cave radio system used in the rescue of the Wild Boars operates down at 87 kiloHertz. Surface-to-submarine radio systems all operate below 30kHz.