3 ms·
70 cm is a bit of a problem. 97.307(f)(6) limits data transmissions to 56 kbaud and 100 kHz bandwidth. However, digital TV is allowed. Some folks have circumve
by drmpeg 6y ago
70 cm is a bit of a problem. 97.307(f)(6) limits data transmissions to 56 kbaud and 100 kHz bandwidth.
However, digital TV is allowed. Some folks have circumvented the rule by sending a low bitrate video stream as a small part of their overall data.
https://www.law.cornell.edu/cfr/text/47/97.307 https://www.law.cornell.edu/cfr/text/47/97.307
- aidenn0 6y agoWhat sort of effective bit-rate can you get at 56kbaud and 100kHz bandwidth with the allowed powers? If you can net 4 symbols after any error correction, that would yield the 100kbit TFA wants
- drmpeg 6y agoDVB-S2 With 8PSK and 2/3 code rate would give 111 kbps at 56 kbaud. With 0.2 rolloff, the signal would be 67.2 kHz wide. The article is using FSK with a bandwidth of at least 300 kHz, so it's not legal in the US (for data only).