| Jim Fisher on 16 May 2019 03:27:32 -0700 |
[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]
| Re: [PLUG] PLUG Fusion room or DMR Talkgroup |
OK. Let's get back to where this started....getting local like-minded folks ON THE AIR. GO TO A FIELD DAY EVENT. Any that you can attend. http://www.arrl.org/field-day-locator GET ANY RADIO. GET ON THE AIR. A private talkgroup or whatever is STUPID. NOT ham radio. IT's AUDIO IRC. JOIN the Ham community. Don't isolate. Join a club. Go to meetings. OY VEY. We don't need to fix or rebuild the hobby. Just need to participate..... PLAY RADIO. 73 sk On 5/15/19, Rich Freeman <r-plug@thefreemanclan.net> wrote: > On Wed, May 15, 2019 at 7:39 PM Keith C. Perry > <kperry@daotechnologies.com> wrote: >> >> Like an amateur radio beginner's talk specially on digital modes? That >> could be interesting considering many of the hotspots are pi-star based >> and RPi's are a thing. :) > > Keep in mind that digital modes are WAY more diverse than DMR, D-star, > and Fusion. CW is arguably a digital mode. > > Right now we're mostly talking about digital voice mode, not unlike > what cell phones do. Voice goes into a vocoder which generates > packets of data, which then get transmitted using FSK/TDMA/etc > (details vary by mode), with usually around 12.5kHz bandwidth I think. > > But, there are plenty of pure-data digital modes used on HF with much > lower baud rates mainly used to send text, like PSK31 which uses only > 60Hz bandwidth, which is much less than CW/Morse. > > And of course right now we're mostly talking about setting up the > networked groups online, so you get the vocoding and the packets, but > they're sent out over UDP to some server not unlike any random voice > chat application. They're just using the same internal format as the > over-the-air protocol so they're trivial to bridge to a repeater. > > -- > Rich > ___________________________________________________________________________ > Philadelphia Linux Users Group -- http://www.phillylinux.org > Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce > General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug > -- jim fisher Jedijf AJ3DI www.aj3di.com/ www.myfisher.org "Do, or do not. There is no 'try.'" -- Jedi Master Yoda ___________________________________________________________________________ Philadelphia Linux Users Group -- http://www.phillylinux.org Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug