Thanks, Ria. Good information. 73; Mike W7VO
On July 30, 2019 at 11:12 AM "rjairam@gmail.com" <rjairam@gmail.com> wrote:
Further to this, all modes are referred to by ITU emission designators.
The freely available, open source Codec 2 digital voice mode has an emission designator of J2E. J meaning AM single sideband, 2 meaning digital information using a sub carrier and E meaning the payload is telephony.
Compare that to a data mode like Pactor which is J2D - J meaning AM single sideband, 2 meaning digital information using a sub carried, and D meaning the payload is data, telemetry or telecommans.
What matters for the sub-bands in this case is the last letter.
Ria N2RJ
On Tue, Jul 30, 2019 at 2:03 PM rjairam@gmail.com mailto:rjairam@gmail.com < rjairam@gmail.com mailto:rjairam@gmail.com > wrote:
> > As far as I know, digital voice has never been categorized as a data mode. This is why they exist inside of the phone sub-bands, and not the data sub-bands. The same goes for digital SSTV including EasyPal which sends a link to a web file. It resides in the image sub-bands.
For some odd reason it appears as though the FCC cares about content and not so much the emission type.
If what you were saying we’re true, then all current digital voice operations would be illegal because they take place the phone sub-bands.
But we know better, so the long and short is that it won’t be affected.
73, Ria N2RJ
On Tue, Jul 30, 2019 at 1:24 PM Richard J. Norton < richardjnorton@gmail.com mailto:richardjnorton@gmail.com > wrote:
> > > Digital voice has never been big on HF to the best of my knowledge, but is increasingly being deployed on VHF and also being deployed by commercial interests on frequencies outside the ham bands.
It looks like the motion passed at the last Board meeting on Interference and Enforcement, wll outlaw use of digital voice on frequencies below 28 MHz, except inside the tiny ACDS bands.
(2) All digital mode stations that operate with a bandwidth greater than 500 Hz also must operate within the ACDS bands designated in the FCC's Rules, whether or not automatically controlled.
I'm uncertain how this comports with parts of the basis and purpose of Amateur Radio, such as:
Continuation and extension of the amateur's proven ability to contribute to the advancement of the radio art [97.1(b)] Encouragement and improvement of the amateur service through rules which provide for advancing skills in both the communication ans technical phases of the art [97.1(c)]
How should the League respond to possible inquiries or complaints about stifling technical advancement?
73,
Dick Norton, N6AA _______________________________________________ arrl-odv mailing list arrl-odv@reflector.arrl.org mailto:arrl-odv@reflector.arrl.org https://reflector.arrl.org/mailman/listinfo/arrl-odv
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