[amsat-bb] Re: BeeSat at 4800 GMSK

[Nathaniel S. Parsons]

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 at 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
>>
>