Date   

Display aliasing frequencies ???

Guido Schotmans
 

Hello,

Today I was jumping around again it the setting of the FDM-SW2 software. I
wanted to see the full spectrum of 6114 kHz instead of the default 4951 kHz.
The so called part of "aliasing frequencies". But activating this doesn't
seem to do a thing. I had to activate Full BW Spectrum in the Graphics tab.
OK problem solved. But I'm still puzzled what aliasing frequencies checkbox
is supposed to do? Any thoughts ?

See attachment.

73,

Guido.


--
This email has been checked for viruses by AVG.
https://www.avg.com


Re: YET ANOTHER TEST

Charles Muller
 

SORRY AGAIN IT'S STILL NOT WORKING!!  
__________________________

Well, these things can happen as we get older, but there are quite a few sites on ebay selling tablets that might help. I'd suggest seeing your doctor first, though.

Regards,
Charles. :)


Re: Using SPF-08 with Elad Duo or S2

Otso Ylönen
 

Hello,

Motivated by this topic I have now couple of SFE boards to play with. The first project is to make a bandpass filter for the OIRT FM band (65-74 MHz). I actually have the filter already and I will now put it on the board so that I can let SW2 to select it based on the configuration on the External HW Settings.

I am now wondering if I can somehow instruct SW2 to bypass the FDM-S2 internal preselector when (and only when) I am on the OIRT band? I do not see such an option on the External HW Settings. If I select the Bypass Mode from Advanced Settings, the preselector will not be on on any frequency band, regardless of what I do on the External HW settings, right?

Should there not be a Bypass tick box for each row you configure on the External HW Settings?

BR, Otso


Re: YET ANOTHER TEST

Neil Smith G4DBN
 

If you mean the forum messages are not coming through, try using a different email provider to avoid the problems with btinternet's over-zealous spam detection and see if that works correctly. Log in to the groups.io page to confirm that your messages are appearing. If it is something else entirely that is not working, please enlighten us!


Neil G4DBN


On 29/04/2020 13:51, R GRAYSTOCK via groups.io wrote:
SORRY AGAIN IT'S STILL NOT WORKING!!

------ Original Message ------ From: "R GRAYSTOCK via groups.io" <bobby_g22@...> To: EladSDR@groups.io Sent: Friday, 17 Apr, 20 At 08:40 Subject: Re: [EladSDR] YET ANOTHER TEST
STILL CONFUSED SORRY!!


Re: YET ANOTHER TEST

Josh Murray <josh@...>
 

What is still not working?

On Wed, 29 Apr 2020 at 16:33, R GRAYSTOCK via groups.io <bobby_g22=btinternet.com@groups.io> wrote:
SORRY AGAIN IT'S STILL NOT WORKING!!



------ Original Message ------
From: "R GRAYSTOCK via groups.io" <bobby_g22=btinternet.com@groups.io>
To: EladSDR@groups.io
Sent: Friday, 17 Apr, 20 At 08:40
Subject: Re: [EladSDR] YET ANOTHER TEST

STILL CONFUSED SORRY!!




--
Many Thanks

Best Regards

Josh Murray


Re: YET ANOTHER TEST

R GRAYSTOCK
 

SORRY AGAIN IT'S STILL NOT WORKING!!



------ Original Message ------
From: "R GRAYSTOCK via groups.io" <bobby_g22@...>
To: EladSDR@groups.io
Sent: Friday, 17 Apr, 20 At 08:40
Subject: Re: [EladSDR] YET ANOTHER TEST

STILL CONFUSED SORRY!!





Re: NPR and Dynamic Range question

Clint Chron
 

Here is a drill down on Adam’s Web page for the article that discusses NPR:

 

https://www.ab4oj.com/test/docs/npr_test.pdf

 

73

Clint

W7KEC

 

From: EladSDR@groups.io [mailto:EladSDR@groups.io] On Behalf Of Zacharias Liangas via groups.io
Sent: Wednesday, April 29, 2020 2:46 AM
To: EladSDR@groups.io
Subject: Re: [EladSDR] NPR and Dynamic Range question

 

Noise power ratio


Re: NPR and Dynamic Range question

Zacharias Liangas
 

>Are you saying you turned off the AGC and used it without any attenuation?
Just think that my ICOM R75 never overloads . this is a term of high dynamic range or NPR  .
If supposedly Airspy has a dynamic range of 110db BDR  as stated in its web  page , 10 db more than mine's ICOM R75 , simple logic advises Youself's numbers are wrong . Unless my philosophy is old fashioned
I don't know what happens to the ELADS2/FDM  in such cases.
As in example the 50 m band on mid nights (18z) is flooded with 6 powerhouses of -45 dbm signals on SDRconsole  or -15dbFS as stated in Sharp hat cause the overloading . I  live in Thessaloniki

>The Airspy is good for a relatively cheap SDR but it has it's limits.
In practice Airspy performs  as my stadalone radios , much better  than the RSP1a in the lower bands


Re: NPR and Dynamic Range question

Alan
 

some details can be found here:
https://www.ab4oj.com/test/main.html#NPR
Andy,

Thanks, all I could find was "National Public Radio"!

Alan


Re: NPR and Dynamic Range question

Andreas Rehberg
 

 
some details can be found here:
 
 
Andy, DF4WC
 
Gesendet: Mittwoch, 29. April 2020 um 08:54 Uhr
Von: "Alan via groups.io" <alanzfq@...>
An: EladSDR@groups.io
Betreff: Re: [EladSDR] NPR and Dynamic Range question

Zacharias

>I have seen a reply from Clint Chron referring to NPR a term I meet
for  first time.

Same here, I've never heard of it.
>
> By the way I tested a loaned  Airspy Discovery from a friend that
> overloads with my 2x16 m antenna with all RF settings off  (ATT , AGC
> ,preamp )
>
Any radio can overload if given a big enough signal.
Are you saying you turned off the AGC and used it without any attenuation?
The Airspy is good for a relatively cheap SDR but it has it's limits.

73 Alan G4ZFQ


 


Re: NPR and Dynamic Range question

Alan
 

Zacharias

I have seen a reply from Clint Chron referring to NPR a term I meet
for  first time.

Same here, I've never heard of it.

By the way I tested a loaned  Airspy Discovery from a friend that overloads with my 2x16 m antenna with all RF settings off  (ATT , AGC ,preamp )
Any radio can overload if given a big enough signal.
Are you saying you turned off the AGC and used it without any attenuation?
The Airspy is good for a relatively cheap SDR but it has it's limits.

73 Alan G4ZFQ


Re: Need Tuning Shaft Encoder Information Please!

Marko Myllymaki
 

Hello,
Anyone here who has changed E2 knob encoder ?
Mine has failed and I have replacement part arriving today or later this week.
I have not yet opened the rig but encoder is clearly faulty part.
I'm just wondering how much of the rig needs to be disassembled and if anyone already went through learning experience ?
73 de Marko N5ZO


NPR and Dynamic Range question

Zacharias Liangas
 

Hello again

In my previous post in ‘Cross SDR operation and FDM”  I have seen a reply from Clint Chron  referring to NPR a term I meet for  first time. Based in the context  I understand that is somehow related to Dynamic Range of older analogue receivers.What is the difference and similarity between these two terms?

Here is his email:

The Elad Duo and S2 radios have significantly better overload performance than the RSP1A.  I have all three radios.  The Elad NPR performance is in the low 70s and the RSP1A is in the high 40s.  Most older analog HF transceivers have NPR figures in the mid to high 50s.  The very best high end SDR transceivers (Flex, Icom, Yaesu, and Anon) have NPR figures in the low 80s.  BTW – the same holds true for 3rd Order IMD performance of the mentioned radios.


By the way I tested a loaned  Airspy Discovery from a friend that overloads with my 2x16 m antenna with all RF settings off  (ATT , AGC ,preamp ) Two reviewers advised that didn't happen to them , Ther are here many signals between -50 and -35 dbm on local  nights /UTC+3. 
I don't know what can mean to you but for me it seems it is either 'damaged' or the its old called dynamic range is limited. 


Re: Cross SDR operation question and FDM

Zacharias Liangas
 

What is the difference between NPR and dynamic range?


Re: FDM DUOr remote access #fdm-duo

F0ECM
 

Thank you Paul for the information, it works great !!

Eric


Re: Tuning RX Channels

phoekzema Hoekzema
 

Hello Rich,

 

I was hoping someone else with answer you, because they would probably use some graphics.  A picture is worth a thousand words.  I have the FDM-DUO but the software is the same for that and the SW receivers is the same.  I am using FDM-SW2  3.033.

  1. On the DUO VRX1 and the Local Oscillator are the same  unless you unlock them.  The indication is that VRX1 will show with the (Lock to CF) button lit.  So under normal settings VRX1 is Center Display.
  2. Set the #1 first, then set the other receivers.  The other receivers will track the VRX1 UNLESS the (Lock ABS) button for the selected is pressed.  It is the third button to the right of the Frequency read out.  Note: if you change the center frequency outside of the absolute setting of the other receivers, all bets are off.  So I disable the RX 2-4 before making a band change.
  3. I you want to turn off RX1’s lock to center screen, press the button and a pop up box will explain what to do.
  4. Pressing the space bar or double clicking the Frequency window will bring up the manual frequency setting box. In this box you can set either the selected receiver or the Local oscillator.

 

Have fun, I love this radio.

 

Peter WA7MOX

 

 

Sent from Mail for Windows 10

 

From: Rich O.
Sent: Monday, April 27, 2020 9:19 AM
To: EladSDR@groups.io
Subject: [EladSDR] Tuning RX Channels

 

Hello,

Pulling my hair out here, I’m trying set the frequency on a couple Virtual receivers.  I have the FDMS2 set at the widest bandwidth but the frequency on one VR sets the frequency all the other active VRs and I can’t set distinct frequencies on each VR.  This is true even though I am changing the frequency by only a few hertz.  What am I doing wrong?


Also what is the simplest way to set the LO in the Middle of the targeted monitoring frequency span.

Thank you

Rich. 

 


Re: MaxDbSm S meter download #smeter

Kjell-Goran SM4GRP
 

Thanks Bill,
I have downloaded the files and will play with it tomorrow.
73/Kjell-Goran SM4GRP


Re: MaxDbSm S meter download #smeter

Bill Nollman
 

From: EladSDR@groups.io <EladSDR@groups.io> On Behalf Of Kjell-Goran SM4GRP
Sent: Monday, April 27, 2020 10:37 AM
To: EladSDR@groups.io
Subject: [EladSDR] MaxDbSm S meter download #smeter

 

Hello all,
I tried to find the MaxDbSm S meter without success. Message has three links where the software should be available but they do not work. Does anybody know where I can find it? It would be a nice addition to the SW2 software.
Thanks / Kjell-Goran SM4GRP


MaxDbSm S meter download #smeter

Kjell-Goran SM4GRP
 

Hello all,
I tried to find the MaxDbSm S meter without success. Message has three links where the software should be available but they do not work. Does anybody know where I can find it? It would be a nice addition to the SW2 software.
Thanks / Kjell-Goran SM4GRP


Tuning RX Channels

Rich O.
 

Hello,

Pulling my hair out here, I’m trying set the frequency on a couple Virtual receivers.  I have the FDMS2 set at the widest bandwidth but the frequency on one VR sets the frequency all the other active VRs and I can’t set distinct frequencies on each VR.  This is true even though I am changing the frequency by only a few hertz.  What am I doing wrong?


Also what is the simplest way to set the LO in the Middle of the targeted monitoring frequency span.

Thank you

Rich. 

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