Date   

Using SDR Console for RFI hunting: artifacts?

Dana Shtun
 


I have the same washer/dryer combo here same vintage….QRM from the washer control board on 144 and then
when the motor is spinning…wow…

Kriss can u send me details of what you did?

73 Dana VE3DS (ve3dss at hotmail.com)

On Jan 25, 2019, at 07:58, Kriss Kliegle <kliegle@...> wrote:

Here are some images of QRM from a Whirlpool Duet clothes washing machine, a high efficiency model from 2005 +/-. Images were taken via SDRC ver 1.5 (high tech in the day!) and antenna at the time was located overhead by about 15':

15 Meters:



17M:






30 Meters:



17 Meters while the RPM is increasing on the spin cycle:



I was able to remove 95% via a bigger and better AC line filter and lastly wrapping many turns of the AC line around a 2.4" toroid. The OEM AC filter was useless in stopping RFI emissions. The line filter I installed inside was one of these or similar, only the top cover of machine has to be removed to access the OEM filter. I also pulled two feet of line cord inside to accommodate the wrapping of the 2.4" core:



SDRC is an EXCELLENT tool for finding RFI emitters that would have normally been missed by 'old school' receivers w/out waterfall displays!

73 Kriss KA1GJU

Attachments:




Re: Doppler control for uplink

Hasan Schiers N0AN
 

Put your SDRC receiver on the station calling CQ

Cursor to the External Radio control panel sub-pane of the Satellite Pane. 

Use your mouse wheel to move your TX frq to approximately the right place (while rx'ing). Make a short tx and see where you are.

Do the same thing several times (dropping tx each time so the 857d can update). Continue to adjust uplink frq until you hear yourself of the CQ station's freq.

Sounds cumbersome, but you get good at it.

I'm using the FT-857d and SDRC just that way, it has now become quite easy to qsy to a station calling cq.

73, N0AN
Hasan


On Thu, Jan 24, 2019 at 6:13 PM WB0WQS <WB0WQS@...> wrote:
I am using an FT-857d (for up-link) and configured withing SDR-Console Satellite.  I am not expecting the cat to control the FT-857D on transmit, cuz I know it won't. But
It will update the transmit frequency while I am in receive between transmissions. All that is working fine, except if another station is calling cq, how do I track the transmitter the the
up-link frequency? Thank you for responding. 


On Thu, Jan 24, 2019 at 5:26 PM <wageners@...> wrote:
What radio are you using for uplink and how is it configured within SDR-Console?


Re: Using SDR Console for RFI hunting: artifacts?

Kriss Kliegle KA1GJU
 

Here are some images of QRM from a Whirlpool Duet clothes washing machine, a high efficiency model from 2005 +/-. Images were taken via SDRC ver 1.5 (high tech in the day!) and antenna at the time was located overhead by about 15':

15 Meters:



17M:






30 Meters:



17 Meters while the RPM is increasing on the spin cycle:



I was able to remove 95% via a bigger and better AC line filter and lastly wrapping many turns of the AC line around a 2.4" toroid. The OEM AC filter was useless in stopping RFI emissions. The line filter I installed inside was one of these or similar, only the top cover of machine has to be removed to access the OEM filter. I also pulled two feet of line cord inside to accommodate the wrapping of the 2.4" core:



SDRC is an EXCELLENT tool for finding RFI emitters that would have normally been missed by 'old school' receivers w/out waterfall displays!

73 Kriss KA1GJU


Re: how to add afedri sdr net radio to Radio Definitions

Stephen Matthias
 

Yes, I finally have the SDRconsole working.  It was something to do with Microsoft anti-virus blocking parts of the radio.  After messing around for an hour or two, a dialog box appeared with Do you want to allow this application to run?  Then it was "tufty come badges".


On Thu, Jan 24, 2019 at 11:54 PM Stephen Matthias via Groups.Io <smsteve53=gmail.com@groups.io> wrote:
I have sorted out the Administrator problem.  I was spoon fed by an Indian chap courtesy of Microsoft Corporation support.

On Tue, Jan 22, 2019 at 9:48 AM yo7fb <yo7hhi@...> wrote:
Good for you!
"An administrator is someone who can make changes on a computer that will affect other users of the computer.Administrators can change security settings, install software and hardware, access all files on thecomputer, and make changes to otheruser accounts."
Try read more on: https://www.ryadel.com/en/windows-users-administrators-group-without-admin-rights-uac-fix/.
Stiil need help for SRDconsole?
Marius.


Re: how to add afedri sdr net radio to Radio Definitions

Stephen Matthias
 

I have sorted out the Administrator problem.  I was spoon fed by an Indian chap courtesy of Microsoft Corporation support.

On Tue, Jan 22, 2019 at 9:48 AM yo7fb <yo7hhi@...> wrote:
Good for you!
"An administrator is someone who can make changes on a computer that will affect other users of the computer.Administrators can change security settings, install software and hardware, access all files on thecomputer, and make changes to otheruser accounts."
Try read more on: https://www.ryadel.com/en/windows-users-administrators-group-without-admin-rights-uac-fix/.
Stiil need help for SRDconsole?
Marius.


Re: Doppler control for uplink

WB0WQS <WB0WQS@...>
 

I am using an FT-857d (for up-link) and configured withing SDR-Console Satellite.  I am not expecting the cat to control the FT-857D on transmit, cuz I know it won't. But
It will update the transmit frequency while I am in receive between transmissions. All that is working fine, except if another station is calling cq, how do I track the transmitter the the
up-link frequency? Thank you for responding. 


On Thu, Jan 24, 2019 at 5:26 PM <wageners@...> wrote:
What radio are you using for uplink and how is it configured within SDR-Console?


Re: Doppler control for uplink

wageners@...
 

What radio are you using for uplink and how is it configured within SDR-Console?


Re: Help with Ettus B210

Terry_G0EZY
 

I finally got my N210 + UBX40 daughter board with SDR-Console on Windows 7-64 but amongst many other problems, I had that fault message. Have you installed the Ettus Research UHD utilities and can you run them without errors - especially uhd_usrp_probe?  The N210 loads the FPGA image in a different way to the B200.. but I "think" it was loading an FPGA image incompatible with the uhd host code. This may have been due to the path to the images being incorrect. After I got the uhd utilities to run without errors, SDR-Console worked OK.

I am definitely not an expert in this and I have got this system running by luck and persistence rather than expertise. It is also running with the SoDaRadio multi-mode transceiver in Ubuntu-Linux.

Good Luck


Re: SDR Console v3 with DX Patrol MK4 SDR (RTL2832)

w5mmj@...
 

To supplement previous posts on this topic, I have attached the user guide for DX Patrol MK4 SDR.   There is reference to selecting Q Input in the Direct Sampling setup window.  I do not recall seeing this window in SDR Console.  Is that feature available?  Also, in the external radio setup, how do I input the xcvr the IF of 9 Mhz.  I tried 9.000.000 but there are no signals shown on the spectrum and waterfall displays.  

Thanks,

Don 
W5MMJ

 

 


Re: SDR Console v3 with DX Patrol MK4 SDR (RTL2832)

w5mmj@...
 

To supplement previous posts on this topic, I have attached the user guide for DX Patrol MK4 SDR.   There is reference to selecting Q Input in the Direct Sampling setup window.  I do not recall seeing this window in SDR Console.  Is that feature available?  Also, in the external radio setup, how do I input the xcvr the IF of 9 Mhz.  I tried 9.000.000 but there are no signals shown on the spectrum and waterfall displays.  

Thanks,

Don 
W5MMJ


Doppler control for uplink

Kelly Ellison <wb0wqs@...>
 

Hello all. 
I am using sdr-console with a rsp-1a and it is working great.  Can anyone tell me how to change the up-link frequency with SDR Satellite program so it will
track with the down-link frequency? If I start out the pass calling cq.. and track my down-link signal.. it works great. but if I try and answer a cq on a different frequency
I can't move to the correct up-link frequency without the transmitter going back to the original frequency. Is there a trick?  thank you..I have made many contacts on the linear birds.
73 - WB0WQS - Kelly Ellison


Re: Using SDR Console for RFI hunting: artifacts?

Brendan Wahl
 

Bill,
That repetitious image looks like a washing machine, really. A High Efficiency one that is, as their electric drive/control unit keeps recomputing the needed electrical load constantly. Haven't yet fixed my own machine, but it looks to be that ferrites on the AC will do the trick. I do see the neighbors' washer too, but it is much weaker and a lesser issue in my situation.
For the FM 'hump' I'd suggest adjusting both AGC and RF gain until absolute minimum FM is seen. You may also need an FM band filter, but first see what happens with fine tuning the settings.
I have both an RSP2 and an HF+, and they each have their own settings, thankfully saved automatically in SDRC. Find the sweet spot and stay there.
Brendan WA7HL


Re: I've Been Busy

Brendan Wahl
 

Wait, we're NOT real? 
I thought the Matrix was just part of a movie, now you are saying it isn't?
Worried batteries want to know...
Cheers, Simon, you're the best.
Brendan WA7HL


Re: waterfall spikes on 5 khz intervals

Kriss Kliegle KA1GJU
 

Hmmm...
We might be onto something here!

I see the same thing here on my SDR-iq's. One moment I have massive QRM from AM BC'ers, change bands and frequencies, come back to original frequency and band is magically all quiet. Here's two screen shots, 15 minutes apart, taken from one of my SDR-iq servers (#3 to be exact):

One with massive 10kHz AM BC QRM:



None to be found here:




A possible bug Simon??

I attached the original images as well for further diagnosis.


73 Kriss KA1GJU


Re: Using SDR Console for RFI hunting: artifacts?

bill K7WXW
 

Sorry, I didn't post the images. They are in place now. 

The images are from an SDR and laptop run on battery with the mains power shut down.  I am pretty sure they are not self-inflicted, though it could be a signal from the laptop itself. 

The repetitive signals are showing up in particular bands, not throughout.  

And thanks, I will query and RFI group. That said, I am trying to understand, more basically, how and when a system like this creates artifacts so I can account for such things when I am analyzing data.

Thanks!


Re: Using SDR Console for RFI hunting: artifacts?

Alan Melia
 


Bill, if signals repeat then in all probability the source is at the repetition frequency that is 18kHz !! If it looks like an FM BC signal, then there are further suggestions......
The 18kHz is probably the switcing frequency of a power supply.I have traced a source to a local TV by audibly ''correlating' the cadence of the ''modulation. I surmise that the audio loan due to driving the speakers is causing theswitching frequency to deviate. I could pin the channel that the TV was switched to by comparing with my own set. I surmise that the TV radiated the power supply switchingfrequency on the braid of the coas to the terrestrial antenna. It was 300 feet away !
 
They sound as though they are very close. S0 use batteries and kill your own power supply just to make sure it is not self inflicted.
 
I wont extend this, you would be better to query an RFI group or EMC group, though beware thereare many who are very swift to tell you what it is without them really having any idea what they are talking about.
Alan
G3NYK
 
 

----- Original Message -----
From: bill K7WXW
Sent: Wednesday, January 23, 2019 10:17 PM
Subject: [SDR-Radio] Using SDR Console for RFI hunting: artifacts?

I am using SDR Console with an RSP2 to look for local noise sources, mostly in the 3 to 30 MHz range. I've seen/heard a couple of things that I don't understand and I am trying to figure out whether they are (a) real signals, (b) artifacts created by the software, (c) artifacts created by the radio.  If this isn't the appropriate forum, let know.

I have uploaded a couple of images that I will describe below. You can find them here:  

https://www.dropbox.com/sh/x6nff71a1iakg7y/AAALpTsfBvUqNXn3u3u0PClXa?dl=0

The first one: apparent FM broadcast station images in the HF band. I find an image of one or more commercial FM stations at several places in the HF band. The image, FM hump, shows one at 7.2 MHz. 

The second one: a repetitive, narrowband, signal.  The image, repetition, shows one example at 10MHz, of a signal that appears at approximately 18KHz intervals.  I have notice different repetition rates but the signal always spans whatever bandwidth I am examping. 

In both cases, I am running the RSP2 with the RF gain at 7, the IF gain at -55dB, and the AGC off.  

Here's the question:  Are these real signals or artifacts created by the radio or by the software and radio together? 

thx and 73 bill K7WXW


Re: Using SDR Console for RFI hunting: artifacts?

Dale Elshoff WB8CJW <dale.elshoff@...>
 



Virus-free. www.avast.com


Using SDR Console for RFI hunting: artifacts?

bill K7WXW
 

I am using SDR Console with an RSP2 to look for local noise sources, mostly in the 3 to 30 MHz range. I've seen/heard a couple of things that I don't understand and I am trying to figure out whether they are (a) real signals, (b) artifacts created by the software, (c) artifacts created by the radio.  If this isn't the appropriate forum, let know.

I have uploaded a couple of images that I will describe below. You can find them here:  

https://www.dropbox.com/sh/x6nff71a1iakg7y/AAALpTsfBvUqNXn3u3u0PClXa?dl=0

The first one: apparent FM broadcast station images in the HF band. I find an image of one or more commercial FM stations at several places in the HF band. The image, FM hump, shows one at 7.2 MHz. 

The second one: a repetitive, narrowband, signal.  The image, repetition, shows one example at 10MHz, of a signal that appears at approximately 18KHz intervals.  I have notice different repetition rates but the signal always spans whatever bandwidth I am examping. 

In both cases, I am running the RSP2 with the RF gain at 7, the IF gain at -55dB, and the AGC off.  

Here's the question:  Are these real signals or artifacts created by the radio or by the software and radio together? 

thx and 73 bill K7WXW


Re: waterfall spikes on 5 khz intervals

Joe Puma
 

Hey sounds reasonable, if you hear IMD yea maybe gain is up really high. Or you’re getting an overload of BCI but your commercial radio has some band pass filtering? Maybe put a BCI filter on and see if the spikes go away or if you hear am even at high gain. I get IMD on my rtfsdr’s with high RF gain in HF even when using the radios IF and the dongle as pan-adapter, I usually turn off any LNA or RF gain as it shouldn’t be needed for HF, as I was told.

Thanks,
Joe
kd2nfc

On Jan 23, 2019, at 1:01 PM, herbk@... wrote:

Hello, Joe:
Yes, I listened in on my transceiver (same antenna) and there is nothing there. There is no discernible spike/transmission/rfi when
approaching these frequencies. 

Listening more carefully, there is some audio (continuous) at extremely low levels throughout
the 75 meter band. When I move to another band and then back, it's not present. I would have
to assume that when the radio is first powered, the AGC may not be active and the radio maybe
without any attenuation. So it is at maximum sensitivity and this mus be intermodulation/overload. 
Changing bands must act as an AGC reset.
This would be consistent with my earlier screenshots: as you can see base signal levels drop 3 S-units after the
band switching has taken place.

That's my theory, anyway
Thanks

N2GEW <Screenshot_2019_01_23_123956.png>


Re: I've Been Busy

pinoleronica <pinoleronica@...>
 

When the “shutdown” end, I will commit to $ome dog food.

Rafael
NN3RP
Anan 7000 adept