NAQP RTTY

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  • Updated 5 years ago
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Thanks for the Qs Stu!  :)

6700 performed well during the contest but it really needs correct click tuning.  Is this something that is going to happen?

What I mean is that when I click on a signal, weather it by CW, DIG or SSB, the signal should go to the center of the filter passband.  Maybe not so critical for SSB.  CW already does it.  But for digital modes it is a necessity for click tuning and there needs to be something to set an offset for spots so when they are clicked the radio goes to the signal in the filters passband.


73
Greg

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Greg

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Posted 5 years ago

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Stu Phillips - K6TU, Elmer

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Greg,

Likewise!  NAQP RTTY was fun and I turned in a personal best in the event so I'm a very happy camper!

I don't know about the status of click tuning so I'll leave for Tim to comment but...

The question also begs what offset?  I run RTTY with low tones - a mark of 915 Hz so that after a long contest I don't hear diddles in my head for the next couple of days!  I know many folks use the standard 2125 Hz mark frequency.  So at a minimum, the offset would have to be configureable.  

Many an alternative suggestion would be an option to allow the center of the filter frequency to be set to the clicked location...  although I no longer have my 5000 to test PowerSDR with, my recollection is that is how the click tuning worked in digital mode.

I have the same click challenge with band maps in Writelog...  you never know what frequency the spotter really reported - not an issue for the NAQP because I always operate unassisted but a big issue for WPX RTTY.

Stu K6TU
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Tim - W4TME, Customer Experience Manager

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We will eventually get around to adding features to SmartSDR that are digital mode operation centric, but first we have to knock out the published roadmap.  Being a digital mode op, you can rest assured that when the time comes, we'll address these concerns and needs.
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Greg

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Stu...exactly on point and I think we are saying the same thing.  Click on the signal and that is where the center of the filter should be.  I agree about the tones.  I prefer 915Hz also but there presently is no way to change it that I can find.  So the filters are centered around 1500 Hz and that is what I use to set in MMTTY....1445 Mark and 1615 space and I make that the ham default.

Thanks Tim!


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Stu Phillips - K6TU, Elmer

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There is a way to get MMTTY to transmit low tones...  however, you have to edit the USERPARA file as well as the MMTTY.INI file - these are both present in the directory where MMTTY is installed.

Open each file with NOTEPAD and look for a string of "2.125" - you will find this as part of a couple of parameters with a scientific format number like "2.125000E3"...

Change each occurrent to "9.15000E2" and then save the file.

Do the same with both files and you are done.

I haven't found a way to modify MMTTY behavior without editing the files...

Works like a charm!
Stu K6TU
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Don - kx9q

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Stu
I searched the App Store for K6TU, K6TU Control, and K6TU Control iPad but I got no hits in the App store.  

Don

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Don - kx9q

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thanks.  I just don't understand why I cant get it by seaching for "K6TU Control".
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Stu Phillips - K6TU, Elmer

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Are you looking in the Mac App Store instead of the iTunes App Store?

That makes the difference!
Stu K6TU
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Don - kx9q

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I was looking in the App Store.
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Ken W9IE

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Stu,
Remember on the Flex 5000,  We could RIGHT CLICK on a Filter and assign the High and Low
offset....   This then became the RTTY Filter and offset from zero.
All we needed to do was to select that filter with whatever name we assigned to it.
If we could just repeat that feature it would be a great help for myself.
This is possibly what you are doing on your IPAD App.
I wonder what TIM's view of this feature is.

Ken  W(IE
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Stan - VA7NF

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When designing a filter for digital use, please consider making it a dual filter with an adjustable level between mark and space.  i.e. mouse drag down the centre part of the filter to say -20db.

This will reduce background noise and other station's mark/space signal level between the target station tones.  It will still pass enough signal for tuning purposes.