[Lowfer] WD2XNS 137.750 JASON Mode

Douglas D. Williams kb4oer at gmail.com
Sun Dec 29 09:43:32 EST 2013


Almost got you this time. Both receivers got the word CALM, then most of
your call, with different missing characters, lol.

https://dl.dropboxusercontent.com/u/33457409/Screenshot%202013-12-29%2009.40.40.png

D.


On Sun, Dec 29, 2013 at 9:40 AM, John Andrews <w1tag at charter.net> wrote:

> Doug,
>
> I don't think that sound card cal makes a lot of difference, as the
> decoding depends on the frequency difference between successive tones.
>
> JASON does not have forward error correction, so fades and noise hits can
> cause lost characters. On the other hand, it doesn't wallow around looking
> for a re-sync, so the obliterations are usually confined just to the bad
> signal period.
>
> It does make a decent weak-signal QSO mode. The character throughput is
> better than QRSS3.
>
> John, W1TAG
>
>
> On 12/29/2013 9:32 AM, Douglas D. Williams wrote:
>
>> Running it on two separate receivers. Got "2XNS" on one of them.
>>
>> Probably need to calibrate my sound card to get good results with this
>> mode.
>>
>>
>>
>>
>> On Sun, Dec 29, 2013 at 9:09 AM, <jrusgrove at comcast.net> wrote:
>>
>>  JA
>>>
>>> Don't notice any 'nasties' on the signal during the frequency excursions
>>> here ... how about at your locale? Would assume it is phase continuous.
>>>
>>> JR
>>>
>>>
>>> ----- Original Message ----- From: "John Andrews" <w1tag at charter.net>
>>> To: "Discussion of the Lowfer (US, European, &amp;UK) and MedFer bands" <
>>> lowfer at mailman.qth.net>
>>> Sent: Sunday, December 29, 2013 9:07 AM
>>>
>>> Subject: Re: [Lowfer] WD2XNS 137.750 JASON Mode
>>>
>>>
>>>   JR,
>>>
>>>>
>>>> Decoding OK here...strong signal, obviously. For the group, the screen
>>>> should show "JN" in the bottom left corner, indicating Jason Normal
>>>> mode.
>>>> Don't enable the Fast, Slow or Turbo options.
>>>>
>>>> JA
>>>>
>>>> On 12/29/2013 9:00 AM, jrusgrove at comcast.net wrote:
>>>>
>>>>  Doug
>>>>>
>>>>> 137.750 is the center of the signal. I normally use cw mode with an 800
>>>>> Hz BFO. The program allows setting other BFO offsets. Signal (if
>>>>> visible) should fall between yellow 'guardrails'.
>>>>>
>>>>> Jay
>>>>>
>>>>> ----- Original Message ----- From: "Douglas D. Williams" <
>>>>> kb4oer at gmail.com>
>>>>> To: "Discussion of the Lowfer (US, European, &amp,UK) and MedFer bands"
>>>>> <lowfer at mailman.qth.net>
>>>>> Sent: Sunday, December 29, 2013 8:56 AM
>>>>> Subject: Re: [Lowfer] WD2XNS 137.750 JASON Mode
>>>>>
>>>>>
>>>>>   For some reason, it won't let me select audio input device, but I see
>>>>>
>>>>>> the
>>>>>> blue bar on the left moving, so I assume it selected the proper mic
>>>>>> port. I
>>>>>> have random characters popping up in the window.
>>>>>>
>>>>>>
>>>>>> On Sun, Dec 29, 2013 at 8:54 AM, Douglas D. Williams
>>>>>> <kb4oer at gmail.com>wrote:
>>>>>>
>>>>>>   Never used Jason before, but I downloaded it and got it running. I
>>>>>>
>>>>>>> assume
>>>>>>> set the receiver to USB?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Sun, Dec 29, 2013 at 8:41 AM, <jrusgrove at comcast.net> wrote:
>>>>>>>
>>>>>>>   From the grooveyard of forgotten favorites ... WD2XNS will be
>>>>>>>
>>>>>>>> transmitting in Jason  mode (normal speed) for the next couple
>>>>>>>> hours. IIRC,
>>>>>>>> first time I've run this mode with the phasing exciter > frequency
>>>>>>>> doubler
>>>>>>>>
>>>>>>>>> Class D setup. Print out looks okay locally.
>>>>>>>>>
>>>>>>>>
>>>>>>>> Reports appreciated.
>>>>>>>>
>>>>>>>> Jay W1VD  WD2XNS  WE2XGR/2  WG2XRS/2
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