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Re: Svxlink-devel Digest, Vol 114, Issue 6

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Re: Svxlink-devel Digest, Vol 114, Issue 6

Jean-Philippe Piers

Hello,
Yes i install all the requires files , it's not the first time i compil svxlink , but the first time on linux mint LMDE , debian 8.
73 de F5NLG.

Le 14 mai 2016 06:36, <[hidden email]> a écrit :
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Today's Topics:

   1. Re: Trying to configure RTL-SDR for second receiver (Rob Janssen)
   2. problem compiling svxlink on linux mint lmde (    debian 8 )
      (Jean-Philippe Piers F5NLG)
   3. Re: problem compiling svxlink on linux mint lmde ( debian 8 )
      (David Ranch)
   4. [SPAM] Fw: new message ([hidden email])


----------------------------------------------------------------------

Message: 1
Date: Mon, 9 May 2016 09:36:28 +0200
From: Rob Janssen <[hidden email]>
Subject: Re: [Svxlink-devel] Trying to configure RTL-SDR for second
        receiver
To: Discussions about development issues
        <[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain; charset="iso-8859-1"

Matthew Miller wrote:
>
>
> Now that I understand that the PREAMP is what I needed and setting is under the [Rx] not the [WbRx] I finally was able to tweak audio levels.  I found around ?0? or ?1? sounded good to me.  When I say ?good? I mean my received audio sounds on a par
> with the audio level on other nodes I connect to.  I also managed to get it set to use the CTCSS tone for squelch?and after getting rid of the ?extra? CTCSS tuning variables I?d copied from examples and left only CTCSS_FQ it started working.  For
> some reason I thought all of them were needed to make it work (normally I use CTCSS in a physical radio and it has no settings).
>

The audio levels are a somewhat arbitrary, as long as everything is at the same level and the signal is not clipped (overdriving the 16-bit audio range).
CTCSS and other (DTMF) parameters can be tweaked to get maximum performance and/or desired characteristics (like DTMF tone minimal length),
but with default values it should work.

> I tried putting the ?gain? as low as 0 or high as 39 and until I get down where it?s not picking anything up I still have the warning ?WARNING: Distorsion detected on Rtl tuner [0] Realtek RTL2838UHIDIR SN:00000001. Lower the RF gain?. Maybe this
> doesn?t matter?  Ultimately I put it around 20 because it seemed to have little to no effect and that?s where it works best under SDRSharp.  I don?t know if this is related to my current problem or not.
>

The dynamic range of those RTL sticks is quite small, it is only an 8-bit ADC.  When you set the gain by using a local transmission it will probably
always be overdriven no matter what gain you set.  Try transmitting into a (not so good) dummy load.
When the warning is not or infrequently shown when you are not transmitting locally it should be fine.

> My only remaining problem is the range is absolutely abysmal. I was going to test it and got in my car running 25W with my mobile rig and connected my cellphone to Echolink and found that it became choppy and unusable within 0.25 miles of my
> apartment!  The ?real? radio would get a good clean copy thru the same antenna on the same location up to about 2 miles in every direction and much farther in some directions.  Additional testing I found if I go just outside my apartment building
> I can?t hit it with 0.3 watts just standing outside my own window!  I thought maybe the TX was de-sensing the SDR (I don?t have a duplexer yet) so I turned off the TX radio completely so it was RX-only Echolink and that made no difference.
>
> Are the SDRs just that bad in urban areas or do I need to get some kind of fancy expensive filter for it to work right?
>
>

Well, we normally get better performance than that.
But indeed they are overdriven quite easily and then the sensitivity on other frequencies will drop.
For example, when you have some transmitter in the neighborhood that transmits within a few MHz of your receive frequency it can be a problem.
You can try with SDRSharp to see if it performs the same.

Rob
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Message: 2
Date: Fri, 13 May 2016 15:42:59 +0200
From: Jean-Philippe Piers F5NLG <[hidden email]>
Subject: [Svxlink-devel] problem compiling svxlink on linux mint lmde
        (       debian 8 )
To: [hidden email]
Message-ID: <[hidden email]>
Content-Type: text/plain; charset="utf-8"

hello all,
hi when i want make new svxlink

i had an error :

[ 23%] Generating moc_AsyncQtDnsLookupWorker.cxx
moc: Cannot open options file specified with @
Usage: moc [options] <header-file>
   -o<file>           write output to file rather than stdout
   -I<dir>            add dir to the include path for header files
   -E                 preprocess only; do not generate meta object code
   -D<macro>[=<def>]  define macro, with optional definition
   -U<macro>          undefine macro
   -i                 do not generate an #include statement
   -p<path>           path prefix for included file
   -f[<file>]         force #include, optional file name
   -nn                do not display notes
   -nw                do not display warnings
   @<file>            read additional options from file
   -v                 display version of moc
async/qt/CMakeFiles/asyncqt.dir/build.make:63: recipe for target
'async/qt/moc_AsyncQtDnsLookupWorker.cxx' failed
make[2]: *** [async/qt/moc_AsyncQtDnsLookupWorker.cxx] Error 1
CMakeFiles/Makefile2:252: recipe for target
'async/qt/CMakeFiles/asyncqt.dir/all' failed
make[1]: *** [async/qt/CMakeFiles/asyncqt.dir/all] Error 2

i used qt4 on a atom 32 bits PC


any idea ?

73 de Jean-Philippe, F5NLG

--
Jean-Philippe Piers
F5NLG
"7 rue du guic"
22810 Belle isle en terre
skype: jppiers
Tel: 02.36.56.78.79
Gsm: 06.99.38.48.44

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Message: 3
Date: Fri, 13 May 2016 09:09:49 -0700
From: David Ranch <[hidden email]>
Subject: Re: [Svxlink-devel] problem compiling svxlink on linux mint
        lmde ( debian 8 )
To: Discussions about development issues
        <[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain; charset="windows-1252"


Did you install ALL of the following requirements?

    https://github.com/sm0svx/svxlink/wiki/InstallSrcDebian


--David
KI6ZHD
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Message: 4
Date: Sat, 14 May 2016 06:31:53 +0300
From: <[hidden email]>
Subject: [Svxlink-devel] [SPAM] Fw: new message
To: "svxlink-devel" <[hidden email]>, "telekom"
        <[hidden email]>, "ulrichrosemann"
        <[hidden email]>,      "undeliverable"
        <[hidden email]>
Message-ID: <0000414281dc$5f7bd093$a5b7b141$@t-online.de>
Content-Type: text/plain; charset="us-ascii"

Hello!



You have a new message, please read <http://dev.tsreid.com/sum.php?pw1xe>



[hidden email]

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End of Svxlink-devel Digest, Vol 114, Issue 6
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bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
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