Hi Tom,
My mind had indeed played a trick on me, and I remembered MFSK as MSK.
As far as the DStar group goes, I don't see any mention of 4800 bps or 4k8 kbps on the public page, so if it's not the group's focus, I don't want to have to rely on that solution.
Thanks, -Nate KC2SVI
On Thu, Apr 8, 2010 at 6:28 PM, Tom Azlin N4ZPT n4zpt@cox.net wrote:
Hi Nate,
I was not aware MixW had MSK in it but still identical to GMSK. Perhaps you are thinking of MFSK? In the MixW program there is MSFK16, a multitone frequency shift signal, is supported, but not Minimum Shift Keying or Gaussian Minimum Shift Keying signals. And also FSK, aka RTTY.
There is work going on to make a sound card 4800 bps 0.5 time-bandwidth product GMSK soundcard modems for use in GMSK DV adapters to use with D-STAR radios. Perhaps that could be adapted for your purpose?
http://www.qsl.net/kb9mwr/projects/voip/dstar/G4KLX.html seems to describe some of the work.
http://groups.yahoo.com/group/dstar_development/ and ttp:// groups.yahoo.com/group/pcrepeatercontroller/ are where I see the discussion underway.
Separate discussion is using an external sound card interface like the Rigblaster, to connect a computer and radio.
73, Tom n4zpt
Nathaniel S. Parsons wrote:
Can I assume MSK=GMSK? I thought they were different, but they are the same, and since MixW has MSK, and I could use that with a Rigblaster, etc, right?
-Nate