Date   

Auto-Contrast Function Question

BobS
 

I have a rather noisy QTH where swaths of spectrum are just filled with noise. I find that when I'm tuning, I am quite often clicking the AUTO button to reset the contrast because the noise levels fluctuate so greatly that the waterfall is too dark or blown out. Is there a setting that can automatically reset the contrast if I change the frequency or slider? I didn't see anything when looking through the settings. This is admittedly a question from a very lazy user.

In an unrelated tangent, SDR Console with the WiNRADiO G31DDC is spectacular!

function-Question.png

Thanks,

Bob, W4RLS


Wanted Elad FDM DUO #eladduor

Randy Barton W9RTB <siteinspect@...>
 
Edited

Hello Group;
The quest is on. Does anyone have an interest in selling their Elad FDM Duo?
Thanks
Randy
W9RTB


Re: Elad FDM with Ic-7300 and HRD

Randy Barton W9RTB <siteinspect@...>
 

Thanks for al the replies and help. Now I have to find one.
Randy
W9RTB


Re: Elad FDM with Ic-7300 and HRD

Mag loop Simon
 

Hi

It should be.just remember the elad uses 3 pc ports for full control ( rx tx and cat.)
ALSO IMPORTANT..use the RX antenna on the elad..DISABLE tx on elad!
This is to stop an “ opps” txed into my ic7300 rx port!

I use an elad duo with my yaesu ftdx3000 this way..

Simon g0zen


Re: Elad FDM with Ic-7300 and HRD

WW1SS. . . Steve
 

I run my 7610 that way. I have a DX Engineering RTR2 to handle the antenna switching and muting receiver when transmitting.


Elad FDM with Ic-7300 and HRD

Randy Barton W9RTB <siteinspect@...>
 

Hello Group;
After using Console with SDR Play and my IC-7300. I am think of getting an Elad FDM Duo. For now I would like to use it on RX only. My IC-7300 would be for TX and driving my KPA500. All are working great with HRD and JTDX running through HRD.
Is is what I want possible?
Randy
W9RTB


Re: SDR Console With Network SDRPlay

Brent Seres/ VE3CUS
 

I use SDR Play over ethernet,  but I have a PC running the SDR Radio server at the radio.  I've never tried it using a raspberry pi

Good luck 
Brent
VE3CUS 





Re: VLF Sunrise Sunset effect at VLF using SDR and "LIL" Low Impedance Loop

Nick Hall-Patch
 

Would  SDR Console's Data Analyser do what you're suggesting?  

Carrier Sleuth ( https://www.blackcatsystems.com/software/medium_wave_carrier_display_app.html )  can also display carrier shifts and smearing due to propagation changes.



Nick



At 05:11 2021-07-08, jdow wrote:
That brings to mind a possibly interesting feature for people into observing changes in propagation would be a means of creating VERY slow waterfall images, once a second, once in 10 seconds, once a minute, once in ten minutes, etc, probably in a traditional 1,2,5,10 sequence. Then you watch the pips move and change with time. With a fine enough spectrum plot you can possibly actually see the frequency changes as the ionosphere moves up and down and the D layer comes in and out. It could be used for education. {^_^}
On 20210707 20:17:02, f5vlb.jmp@... wrote:
have a look here also : https://www.facebook.com/groups/VLF.ULF.ELF

Nick Hall-Patch
Victoria, BC
Canada


Re: 3D waterfall

Tom_D
 

On Mon, Jul 5, 2021 at 07:06 AM, jdow wrote:


A Democrat with a gun in his hands is an object to stay away, far away, from.
This kind of political crap has no place here.


Re: VLF Sunrise Sunset effect at VLF using SDR and "LIL" Low Impedance Loop

kb3cs
 

the signal amplitude change over time is interesting .. but so, too, are the small changes in signal frequency caused by the acceleration and deceleration where the signal refraction takes place. 'good' measurements can be had starting with chip-sized TCXO references of the kind now cheap and prevalent. a GPSDO is quite sufficient for 'better' than 'good'.

On Wed, Jul 7, 2021 at 10:27 PM, Jean-Marie Polard wrote:
Here is such a plot of amplitude of DCF77 during half night and sunrise (a time signal vlf station in Germany) done with vlfrxtools of Paul Nicholson. But with Spectrum Lab one can do the same. Received with an UMC202HD usb soundcard and earth probes antenna


73's Jean Marie F5VLB
[...]


Re: 3D waterfall

kb3cs
 

anyone who is serious about guns knows muzzle discipline.  you appear to have forgotten yours.  ಠ_ಠ 

On Mon, Jul 5, 2021 at 04:06 AM, jdow wrote:
Ah yes, good old Southen boys. THEY know all about gun control. Poor gun control means putting the gun in the hands of a person who does not appreciate how much responsibility that lays on you when you pick up a gun. 1) Gun is always loaded, even if you just unloaded it, put it down a second, and picked it back up. 2) Do not point it at something you do not intend to shoot. 3) If you shot it aim carefully to hit what you intend to hit. 4) Do not use a bigger gun than necessary except for practice on a suitable shooting range. And so forth. And remember, a gun in your hand responds 10 minutes sooner than your panic call to 911.

Those guys I feel safe around.  A Democrat with a gun in his hands is an object to stay away, far away, from.

And that does sound like a more interesting conversation than my latest car repair, my lumbago, my latest operation, my ....

{^_-}
[...]


Re: VLF Sunrise Sunset effect at VLF using SDR and "LIL" Low Impedance Loop

aad vander kooij
 

This is more or less what the Satnford Solar Sid does :http://solar-center.stanford.edu/SID/sidmonitor/
As far as I know, the data is public...
73 PD0AK


Re: [OT] Radio Telescope

Simon Brown
 

That’ll be the bandwidth for all dishes, this is then combined so the actual bandwidth is far less.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Gisle Vanem
Sent: 08 July 2021 11:32
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] [OT] Radio Telescope

 

Something outside the scope of a simple RTLSDR or similar.

On the issue of World's largest Radio Telescope,
from: https://www.space.com/square-kilometer-array-telescope-construction-starts

  • ... listen to radio signals in the vast range of frequencies between 70 MHz to at least 25 GHz ...
  • 131,072 antennas located in Western Australia ...
  • ... collect about 13 terabits of data per second,

Wow!
Simon's new 3D view would have trouble keeping up here.


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: [OT] Radio Telescope

Siegfried Jackstien
 

you need a lot of 4k screens to display that bandwidth ;-)

greetz sigi dg9bfc

Am 08.07.2021 um 12:32 schrieb Gisle Vanem:

Something outside the scope of a simple RTLSDR or similar.

On the issue of World's largest Radio Telescope,
from: https://www.space.com/square-kilometer-array-telescope-construction-starts

  • ... listen to radio signals in the vast range of frequencies between 70 MHz to at least 25 GHz ...

  • 131,072 antennas located in Western Australia ...

  • ... collect about 13 terabits of data per second,

Wow!
Simon's new 3D view would have trouble keeping up here.


[OT] Radio Telescope

Gisle Vanem
 

Something outside the scope of a simple RTLSDR or similar.

On the issue of World's largest Radio Telescope,
from: https://www.space.com/square-kilometer-array-telescope-construction-starts

  • ... listen to radio signals in the vast range of frequencies between 70 MHz to at least 25 GHz ...

  • 131,072 antennas located in Western Australia ...

  • ... collect about 13 terabits of data per second,

Wow!
Simon's new 3D view would have trouble keeping up here.


Re: VLF Sunrise Sunset effect at VLF using SDR and "LIL" Low Impedance Loop

jdow
 

I was thinking of a full spectrum width snap shot taken periodically so that all active channels can be shown fading and possibly, with enough frequency granularity, show the signal frequency change during your plot around 03:00:00. Different channel paths will show different fading times. And the 3 D view would probably be quite artistic.

{^_^}

On 20210707 22:15:26, Jean-Marie Polard wrote:
Here is such a plot of amplitude of DCF77 during half night and sunrise (a time signal vlf station in Germany) done with vlfrxtools of Paul Nicholson. But with Spectrum Lab one can do the same. Received with an UMC202HD usb soundcard and earth probes antenna


73's Jean Marie F5VLB

Le 08/07/2021 à 07:11, jdow a écrit :
That brings to mind a possibly interesting feature for people into observing changes in propagation would be a means of creating VERY slow waterfall images, once a second, once in 10 seconds, once a minute, once in ten minutes, etc, probably in a traditional 1,2,5,10 sequence. Then you watch the pips move and change with time. With a fine enough spectrum plot you can possibly actually see the frequency changes as the ionosphere moves up and down and the D layer comes in and out. It could be used for education.

{^_^}

On 20210707 20:17:02, f5vlb.jmp@... wrote:
have a look here also : https://www.facebook.com/groups/VLF.ULF.ELF


-- 
Jean-Marie Polard
F5VLB

http://www.polard.fr/


Re: VLF Sunrise Sunset effect at VLF using SDR and "LIL" Low Impedance Loop

Jean-Marie Polard <contact@...>
 

Here is such a plot of amplitude of DCF77 during half night and sunrise (a time signal vlf station in Germany) done with vlfrxtools of Paul Nicholson. But with Spectrum Lab one can do the same. Received with an UMC202HD usb soundcard and earth probes antenna


73's Jean Marie F5VLB

Le 08/07/2021 à 07:11, jdow a écrit :
That brings to mind a possibly interesting feature for people into observing changes in propagation would be a means of creating VERY slow waterfall images, once a second, once in 10 seconds, once a minute, once in ten minutes, etc, probably in a traditional 1,2,5,10 sequence. Then you watch the pips move and change with time. With a fine enough spectrum plot you can possibly actually see the frequency changes as the ionosphere moves up and down and the D layer comes in and out. It could be used for education.

{^_^}

On 20210707 20:17:02, f5vlb.jmp@... wrote:
have a look here also : https://www.facebook.com/groups/VLF.ULF.ELF


-- 
Jean-Marie Polard
F5VLB

http://www.polard.fr/


Re: VLF Sunrise Sunset effect at VLF using SDR and "LIL" Low Impedance Loop

jdow
 

That brings to mind a possibly interesting feature for people into observing changes in propagation would be a means of creating VERY slow waterfall images, once a second, once in 10 seconds, once a minute, once in ten minutes, etc, probably in a traditional 1,2,5,10 sequence. Then you watch the pips move and change with time. With a fine enough spectrum plot you can possibly actually see the frequency changes as the ionosphere moves up and down and the D layer comes in and out. It could be used for education.

{^_^}

On 20210707 20:17:02, f5vlb.jmp@... wrote:
have a look here also : https://www.facebook.com/groups/VLF.ULF.ELF


Re: VLF Sunrise Sunset effect at VLF using SDR and "LIL" Low Impedance Loop

f5vlb.jmp@...
 

have a look here also : https://www.facebook.com/groups/VLF.ULF.ELF


Re: 3D waterfall

Siegfried Jackstien
 

looks a bit like ROS mode :-)

dg9bfc sigi

Am 07.07.2021 um 22:04 schrieb данила фадеев:

Hello everybody
Taking this opportunity, I shot a video of what the experimental Russian HF hopping system looks like in the experimental 3D function from Simon. Sorry for the pun :)
   In this case, these are 8ms tones that are pseudo-randomly distributed over a 100 kHz bandwidth. Parcels do not overlap in time.
Thanks to Simon for the tool, and I hope for its further development.

Danila.


вт, 6 июл. 2021 г. в 00:26, jdow <jdow@...>:
Probably they do match in terms of power per pixel. The number of pixels wide makes a difference in levels.
{o.o}

On 20210705 09:15:00, Bart AA7VA wrote:
I find it interesting, and played with it for awhile.  Wasn't sure where in the band, or band width, was showing, but comparisons with the waterfall soon rectified that.
One thing that might help, the background noise (noise floor) does not match that in the waterfall it seems.  I need to adjust the waterfall to see the noise a bit to help in locating signals on the 3D - maybe some freq numbers, or other locating device could be added?  And/or a slide to adjust the background noise level in the 3D separate from the waterfall one? Using the "Auto" button on the left of main panel makes the 3D have zero background to help see the weak signals, so the suggested slide or a bit more gain in the base 3D setting may be of assistance.
Looks like a nifty addition, not sure if I will use it a lot, but interesting to play with.
Thanks for the toy Simon!

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