Re: [wsjt-devel] WSJT-X vs JTDX

[ea2ekh]

Could you send me a randomly picked up subset of the JTDX exclusive decodes 
together with a time stamp?  I have a live data feed from pskreporter for a 
visualization project and I can verify wether other stations received it and 
what they were running.

 I've got mostly  solid data for the last 30 days (except for a couple of 
problems with my data collection script)

For the data inclined, data is being fed to a Elasticsesrch cluster.


73,


Borja - EA2EKH




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[wsjt-devel] WSJT-X and gain staging

[ea2ekh]

Hello,

First, I am late with my translation to Spanish but I will have time next week 
(finally!).

And I've been wondering about proper gain staging in WSJT-X for optimum 
reception. The manual suggests adjusting the input level and RF gain until the 
noise level is at around 30 dB according to the program display, but at least 
being audio minded it's difficult to refer to some external measure.

I am considering writing an article about this, giving some (hopefully useful) 
guidelines. I will send it to the URE magazine but I can write it in English as 
well and share, of course.

I have some questions:

Does the input level send gain adjustment orders to any USB device or is it 
purely a digital gain applied to the sampled signal? At least on Mac OS X I 
haven't observed any change in the input gain of an IC-7200 (it has a TI 
PCM2901E)

What is supposed to be the unity gain setting for the input level slider? 

How does the displayed input level relate to dBFS (decibels related to full 
scale)? 

I could measure that but I am not sure about its behavior on different 
platforms (Windows, Linux, Mac OS X) and with different devices, so it would be 
great to know what it's supposed to be.

TNX DE EA2EKH



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[wsjt-devel] Baseband decoding option?

[ea2ekh]

(Feel free to put on your beards and stone me to death if I say something 
stupid)

There is a new kid on the block, the Icom IC-7300, which is the first SDR 
marketed as a SDR sold by one of the large manufacturers. (Other transceivers 
with so called IF-DSP are actually SDRs using heterodynation).

The Icom DSP IF filtering has a maximum bandwidth of 3.6 KHz (for example in 
the IC-7200) and the newly released IC-7300 shares the same limit. 

However, the new IC-7300 has an interesting new feature: you can feed a 
demodulated audio signal to the USB and ACC connectors, the same as the 
previous models, but you can also send a 12 KHz IF signal, suitable for DRM 
demodulation according to the "full manual" (page 12-7, "ACC/USB" option, which 
can be either AF or IF).

In case this becomes a trend for similar rigs released by other manufacturers, 
wouldn't it be interesting to support baseband decoding? Wouldn't it offer a 
slight edge over the current AF decoding option? 

Cheers,


Borja - EA2EKH



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Re: [wsjt-devel] Gravitational Waves

[ea2ekh]

> On 15 Feb 2016, at 15:31, Joe Taylor <j...@princeton.edu> wrote:
> 
> 
> In case you're interested in more details, I've posted a copy of the 
> full announcement paper as published in Physical Review Letters here:

Thank you very much. Is there a tentative release date for JTgrav? ;)

73,



Borja - EA2EKH

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Re: [wsjt-devel] Translations of the WSJT-X User Guide

[ea2ekh]

> On 12 Jan 2016, at 22:37, Joe Taylor <j...@princeton.edu> wrote:
> 
> Hi Anders, Borja, and all,
> 
> I suggest that translations should probably start with the WSJT-X User 
> Guide in the development branch -- that is, the Guide for Version 1.7.0. 

Great, beginning :)

73,




Borja EA2EKH

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Re: [wsjt-devel] Spanish translation

[ea2ekh]

> On 03 Jan 2016, at 00:32, Bill Somerville  wrote:
> 
> 
> Because we are approaching a candidate release for v1.7.0, now is 
> probably not he best time to start a translation since there will be 
> many changes to the User Guide documenting the latest features. Joe K1JT 
> looks after edits of the User Guide as his name is at the top he 
> naturally wishes the content to be as he would like it. Potential manual 
> translators should coordinate with Joe on this list as to the timing of 
> a phase of translation so unnecessary duplication and reworking can be 
> minimized.

Alright :)

Awaiting instructions from our weak (signal) leader then :)


Borja.


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[wsjt-devel] Spanish translation

[ea2ekh]

Hello,

While getting acquainted with the project sources, there is a contribution I 
can make, translating the manual to Spanish. Has it ever been considered?

73,


Borja EA2EKH



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Re: [wsjt-devel] Spanish translation

[ea2ekh]

> On 31 Dec 2015, at 15:27, Joe Taylor <j...@princeton.edu> wrote:
> 
> Hi Borja,
> 
> 
> If these starting points present no serious obstacles for you, we here 
> on the  email list will happy to help you get started!

Ewword would be a problem, but a markup such as this one or LaTeX is not a 
problem ;)


73, Borja EA2EKH
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Re: [wsjt-devel] Spanish translation

[ea2ekh]

> On 31 Dec 2015, at 15:53, Bill Somerville <g4...@classdesign.com> wrote:
> 
> 
> I would suggest, for now, copying the whole content of the 
> ^/branches/wsjtx/doc/user_guide/ directory including the images. It 
> might be worthwhile for technical reasons to move the current sources 
> down one level into an 'English' directory, I could easily add a loop to 
> the CMake script to generate User Guide documents for a list of 
> languages. If everyone is happy with this approach I can make the 
> necessary changes in a few minutes.

Indeed, it's the best approach.

> For now a basic translation of the User Guide seems a great place to 
> start but anyone taking this on must be prepared to take ownership of 
> the translated files for future releases, there is a lot of new 
> functionality on the way that will also need translating.

No problem with that. Making the first translation is the hardest work, 
updating it later is much lighter.



73, Borja EA2EKH



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Re: [wsjt-devel] R: Re: Tune Power patch

[ea2ekh]

> On 16 Dec 2015, at 18:59, Joe Taylor  wrote:
> 
> I think power settings by band is NOT a good idea, however.  Indeed, in 
> most setups power should not be set using our "Pwr" slider.  The proper 
> audio level should be set with the OS volume control, and power output 
> then set with a control in the radio.  The Pwr slider should be all the 
> way up, at 100%.

So, assuming that the rest of the controls are analog, your recommendation 
would use the maximum possible resolution of the D/A, or am I missing anything 
else?

Borja.


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[wsjt-devel] Suggestion - tuning power level

[ea2ekh]

Hello,

I have a suggestion. I am using a loop antenna (indoors for now, to add insult 
to injury) and it needs retuning whenever y change frequency. 

What I do is to reduce power to the minimum, press the program's tune button, 
raise power to around 5 W and use that to tune the loop. The transmitter power 
I use is around 20 W (bear in mind that a MFJ 1788 mounted indoors is not 
especially efficient).

It would be really useful (and I think that it could encourage more respectful 
practice) to have an option to preset the "tune" level to a fixed power level. 
I know that "tune" here has two different meanings but it could be useful 
anyway. 

The setting would be optional, with the tune button working as usual unless a 
preset level is selected in the preferences, and maybe it would be a good idea 
to override it in case the user moves the output power slider when tuning.

What do you think?


73, Borja EA2EKH


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