03-09-2020, 09:41 PM
Codec2 on 7177KHz
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Our Australian 40m bandplan mentions "Digital Data" from 7040 to 7060 KHz.
And, "Digital Voice" is "lumped" in with SSB 7060 - 7300 KHz. Often busy!!
And, 7040 to 7050 remains quiet.
Question: Did the ACMA or WIA envisage a Digital Voice mode in a 1KHz bandwidth
when the bandplan was created?
Things are getting "blurry" now. The FreeDV team have recognised that their
improved HF modems with Forward Error Correction (FEC) are useful for Data.
So, if I implement TCP/IP or AX25 and over that, convey audio with a low-bitrate
codec, is it Data or Digital Voice?
In essence, I'm looking for a reasonably clear piece of spectrum for the testing
of a FreeDV mode 700D "repeater" (store and repeat) to assess it's usefulness.
I got a reply from a ham in USA, our FCC won't permit Digital Voice in the Data segment. Period.
Hence 7177 KHz was chosen.
What do ya say?
Alan VK2ZIW
================
Our Australian 40m bandplan mentions "Digital Data" from 7040 to 7060 KHz.
And, "Digital Voice" is "lumped" in with SSB 7060 - 7300 KHz. Often busy!!
And, 7040 to 7050 remains quiet.
Question: Did the ACMA or WIA envisage a Digital Voice mode in a 1KHz bandwidth
when the bandplan was created?
Things are getting "blurry" now. The FreeDV team have recognised that their
improved HF modems with Forward Error Correction (FEC) are useful for Data.
So, if I implement TCP/IP or AX25 and over that, convey audio with a low-bitrate
codec, is it Data or Digital Voice?
In essence, I'm looking for a reasonably clear piece of spectrum for the testing
of a FreeDV mode 700D "repeater" (store and repeat) to assess it's usefulness.
I got a reply from a ham in USA, our FCC won't permit Digital Voice in the Data segment. Period.
Hence 7177 KHz was chosen.
What do ya say?
Alan VK2ZIW