[WriteLog] GRITTY working with WL?

Sat Apr 11 09:26:46 EDT 2015

> I always run FSK as this allows me to use the Twin Pass filters
> built into the 7600. As you have indicated it may not be possible to
> use Gritty in a contest unless it were connected to a second receiver
> using a bandwidth significantly wider than that typically used in
> RTTY.

IF [filter] bandwidth is not a problem for GRITTY - I have been testing
it with the default 400 Hz filter in my K3. There may be a problem with
a dual peak/twin pass filter and/or the filter frequency in the rig.
GRITTY is configured for the standard "high tones" (2125/2295) with no
user interface to change those defaults.

The 3 KHz "stream" (horizontal waterfall) also makes tuning difficult
since the color palette is compressed in the narrow active passband
but that does not impact decoding.

GRITTY certainly needs some adjustment of the user interface before it
will be really useful ... but it does work.

73,

   ... Joe, W4TV

On 2015-04-11 12:12 AM, Gary AL9A wrote:
> Ed,
>
> In the IC-7600 the bandwidth choices vary depending upon the selected
> mode. There are three different filter presets for each mode.  In
> LSB/USB the bandwidth can be set anywhere from 3.6 kHz to 50 Hz.  Not
> terribly useful for SSB, but it is possible.  In SSB I have three
> bandwidth presets at 2.5, 2.1 and 1.8 kHz.  In RTTY the bandwidth ranges
> are adjustable from 2.7 kHz to 50 Hz.  My usual presets are 400, 300 and
> 250 Hz.  In CW the bandwidth range is from 3.6 kHz to 50 Hz.  I use the
> same filter presets for CW as I do for RTTY - 400, 300 and 250 Hz.
>
> I always run FSK as this allows me to use the Twin Pass filters built
> into the 7600.  As you have indicated it may not be possible to use
> Gritty in a contest unless it were connected to a second receiver using
> a bandwidth significantly wider than that typically used in RTTY.
>
> 73,
> Gary AL9A
>
>
> -----Original Message----- From: Ed Muns
> Sent: April 10, 2015 7:07 AM
> To: 'Gary AL9A'
> Cc: 'WriteLog Reflector'
> Subject: Re: [WriteLog] GRITTY working with WL?
>
> What IF bandwidth selections are available in RTTY/FSK mode on your radio,
> Gary?  The K3 allows any bandwidth, continuously variable up to 3 kHz.  The
> issue is not AFSK vs. FSK (which is just the transmission method) but
> rather
> the receiver IF bandwidth.
>
> It could be that it requires a 3 kHz bandwidth since it is a component for
> RTTY Skimmer.  If so, I'm not sure how useful it will be for a RTTY
> contesting decoder.  It is unlikely I would run GRITTY alone and I need a
> 500 Hz IF bandwidth for my other decoders.
>
> The N1MM Logger Plus team has interfaced GRITTY and it should be out in a
> future release.  I guess we'll hear from them as to its merits.  I don't
> think much can be evaluated until GRITTY can run side-by-side with MMTTY
> and
> 2Tone over many hours of contesting.
>
> Even when 2Tone was initially available with WriteLog, my first impression
> was that it was "superior" to MMTTY.  But, now after hundreds of intense
> contesting hours, running MMTTY, 2Tone and the DXP38 in parallel on the
> same
> signal, I'm convinced that each decoder has its superior moments when the
> other decoders don't print anything useful.  There are certain conditions
> where one decoder works and the others don't.  If you only experience that
> certain condition, it is easy to infer that the decoder is superior in all
> conditions.
>
> Ed W0YK
>
> -----Original Message-----
> From: WriteLog [mailto:writelog-bounces at contesting.com] On Behalf Of Gary
> AL9A
> Sent: 09 April, 2015 23:07
> To: WriteLog Reflector
> Subject: Re: [WriteLog] GRITTY working with WL?
>
> I've downloaded Gritty but haven't had much time to play with it yet.  Can
> someone enlighten me a bit?  Does it only work for AFSK?  If I set my
> IC-7600 to LSB I can get an occasional call sign to show, but if I put the
> radio into RTTY for FSK it appears the band width is too narrow for Gritty
> to decode.  Or am I off the Mark here?
>
> 73,
> Gary AL9A
>
>
> -----Original Message----- From: Ed Muns
> Sent: April 09, 2015 7:48 PM
> To: 'Jerry Flanders'
> Cc: WRITELOG at contesting.com
> Subject: Re: [WriteLog] GRITTY working with WL?
>
> Currently, GRITTY is a standalone decoder.  The most obvious way to
> integrate it instantly with several loggers is to interface it to xmmt.ocx
> which is what WriteLog, N1MM Logger, DXlabs and several others use to
> integrate MMTTY, MMVARI and 2Tone.
>
> Ed W0YK
>
> ______________________________________________________________
>
> Jerry W4UK wrote:
>
> Anybody got Alex's new RTTY demodulator working with Writelog?
>
> See: <http://dxatlas.com/Gritty/>http://dxatlas.com/Gritty/
>
> _______________________________________________
> WriteLog mailing list
> WriteLog at contesting.com
> http://lists.contesting.com/mailman/listinfo/writelog
> WriteLog on the web:  http://www.writelog.com/
>
> _______________________________________________
> WriteLog mailing list
> WriteLog at contesting.com
> http://lists.contesting.com/mailman/listinfo/writelog
> WriteLog on the web:  http://www.writelog.com/
>
> _______________________________________________
> WriteLog mailing list
> WriteLog at contesting.com
> http://lists.contesting.com/mailman/listinfo/writelog
> WriteLog on the web:  http://www.writelog.com/
> _______________________________________________
> WriteLog mailing list
> WriteLog at contesting.com
> http://lists.contesting.com/mailman/listinfo/writelog
> WriteLog on the web:  http://www.writelog.com/
>