[Lowfer] WD2XES CMSK

[John Andrews]

Cliff,

You're right, but this was not the maiden voyage. We had set it aside 
some years ago. It has some promise as a "local" mode at LF, but doesn't 
seem to do well with real-world noise down here. My suspicion is that it 
would hold together as promised in a smooth-noise situation.

Actually, I've not yet seen an MSK (not MFSK) implementation for ham 
radio that does as well as PSK with similar error correction. Dunno why.

Anyway, for the moment, the MFSK stuff seems better as a chat mode for 
ops with non-linear PA's. Do wish that more development would go into 
PSK modes with robust forward error correction. WOLF was a good example 
of that, but was too demanding for most users.

John, W1TAG

On 11/29/2015 3:09 PM, Cliff Sojourner wrote:
> Hi,
>
> I did not try but I think it is better than that.
>
> Repeated trys, over night, weeks, seasons, years, that's the point, right?
>
> On November 29, 2015 6:32:54 AM PST, John Andrews <w1tag at charter.net> wrote:
>> Lloyd,
>>
>> Thanks for the try. This mode is going back in my trash can.
>>
>> John, W1TAG
>>
>> On 11/29/2015 9:24 AM, Lloyd Chastant wrote:
>>> yep!! no copy
>>> Lloyd
>>>
>>> On Sun, Nov 29, 2015 at 1:18 AM, Lloyd Chastant <lloydc6 at gmail.com>
>> wrote:
>>>
>>>> Monitoring John but will see if any results
>>>> Lloyd W3NF
>>>>
>>>> On Sat, Nov 28, 2015 at 11:30 PM, John Andrews <w1tag at charter.net>
>> wrote:
>>>>
>>>>> WD2XES is running CMSK8 mode tonight on 137.700 kHz until 0330Z or
>> so.
>>>>>
>>>>> CMSK software may be downloaded from:
>>>>> http://www.qsl.net/zl1bpu/CMSK/cmsk.htm
>>>>>
>>>>> After making the usual soundcard selections, click CMSK8 on the
>> lower
>>>>> right side of the screen. If you put your receiver in CW mode, and
>> set the
>>>>> dial to 137.700 kHz, then you will have to click on the BFO pitch
>> in the
>>>>> waterfall. In my case, that's 800 Hz, but yours may vary. The
>> transmit
>>>>> frequency is very close to 137.700 exactly. If you decide to use
>> USB mode,
>>>>> then the target pitch is 1700 Hz.
>>>>>
>>>>> When properly tuned, the tuning indicator shows a circle centered
>> on the
>>>>> Y-axis, with vertical lines spaced equally on both sides. That may
>> be
>>>>> difficult to see with a weak signal. Twiddling the fine tune slider
>> under
>>>>> the tuning indicator will allow you to center the signal.
>>>>>
>>>>> Earlier tests of this mode didn't show the expected promise, but it
>> won't
>>>>> hurt to try again from time to time.
>>>>>
>>>>> Reports are welcome.
>>>>>
>>>>> John, W1TAG/WD2XES
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