Date   
Re: That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp

Airspy US
 

Are you using an Airspy or an RTL device?

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On 3/26/2020 6:28 PM, Neale Wade wrote:

Yes, but it’s not the programs fault. I just installed the program and I had an additional problem.

Originally I downloaded and installed the software that included the plugins. It would hang at start up with the splash screen. I had to move it aside to read the error message window. I un-installed Airspy and installed the software without the plugins. This version doesn’t hang, but I couldn’t get any activity on the screen.

I don’t think my computer is properly identifying the USB device. The hardware is identified as an RTL2838UHIDIR and it’s listed under Bluetooth and Other Devices (Mouse, Keyboard, and Pen). The eject option is for an HID Infrared Remote Receiver. Does any of that make sense? The Airspy program doesn’t list a device, which is why (I think) it isn’t working yet.

I working with my brother in law and hope to make progress later today or tomorrow.

Neale

*From:* airspy@groups.io <airspy@groups.io> *On Behalf Of *DXer
*Sent:* Thursday, March 26, 2020 11:45
*To:* airspy@groups.io
*Subject:* Re: [airspy] That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp

On Thu, Mar 26, 2020 at 02:21 PM, Neale Wade wrote:

I can drag it aside like any software logo screen

The plot thickens. Are you saying it does not go away after a couple of seconds?

Vince


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Re: Transmitter fingerprinting, has someone done it #fingerprinting

Joe M.
 

I've thought about that exact same thing. It would be an interesting plugin. The one I'm waiting for more is a deviation plugin.

There may be programs that use discriminator audio to fingerprint.
I'm not sure if those could be adapted to IQ input.

Maybe using a virtual audio cable, it might work.

Joe M.

On 3/26/2020 6:38 PM, Mike Naruta AA8K wrote:
I am interested is using my AirSpy R2 on VHF for transmitter fingerprinting. This records the received signal characteristics from a transmitter and can identify when that transmitter shows up again. Useful when folks do not identify their transmissions.


Re: Transmitter fingerprinting, has someone done it #fingerprinting

prog
 

This was done before with an RTL-SDR. It's easy to reuse the same code for an Airspy.
https://www.rtl-sdr.com/using-an-rtl-sdr-rf-fingerprinting-and-deep-learning-to-authenticate-rf-devices/

Transmitter fingerprinting, has someone done it #fingerprinting

Mike Naruta AA8K
 

I am interested is using my AirSpy R2 on VHF for transmitter fingerprinting. This records the received signal characteristics from a transmitter and can identify when that transmitter shows up again. Useful when folks do not identify their transmissions.

Re: That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp

Neale Wade <neale.wade@...>
 

Yes, but it’s not the programs fault. I just installed the program and I had an additional problem.

 

Originally I downloaded and installed the software that included the plugins. It would hang at start up with the splash screen. I had to move it aside to read the error message window. I un-installed Airspy and installed the software without the plugins. This version doesn’t hang, but I couldn’t get any activity on the screen.

 

I don’t think my computer is properly identifying the USB device. The hardware is identified as an RTL2838UHIDIR and it’s listed under Bluetooth and Other Devices (Mouse, Keyboard, and Pen). The eject option is for an HID Infrared Remote Receiver. Does any of that make sense? The Airspy program doesn’t list a device, which is why (I think) it isn’t working yet.

 

I working with my brother in law and hope to make progress later today or tomorrow.

 

Neale

 

From: airspy@groups.io <airspy@groups.io> On Behalf Of DXer
Sent: Thursday, March 26, 2020 11:45
To: airspy@groups.io
Subject: Re: [airspy] That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp

 

On Thu, Mar 26, 2020 at 02:21 PM, Neale Wade wrote:

I can drag it aside like any software logo screen

The plot thickens. Are you saying it does not go away after a couple of seconds?

Vince

New SDR# (latest version) User Questions, Please #sdrsharp

rmrrgs
 

Hello,
Using the latest SDR#, 732, for pretty much the first time.
A real beginner with it.

The only User Guide i could find doesn't, always, seem to reflect the bells and whistles on this newest version.
Are there other Manuals and User Guides ?  Where ?

Would like to ask, please:

a.  There does not seem to be any grey lines on either side of the red vertical line.
     Without these, how do I select the width of the "band" that I want to encompass a particular peak, and no other ?
     There probably is, but i can't figure out how to make visible.

b.  Or, is the green vertical line supposed to have this function ?  What is this for , and how used ?
    Again, how do i change the width of ?

c. How do I pull up the Favorites screen so I can add favorite frequencies to it ?

d. Can I load something like eibi into it ?

e. The vertical band with a number (fluctuates) in it on the right hand side of the Spectrum display.
    What is it signifying, please ?

f. And, final one, honest:  How do i change the range (the horizontal axis) of the Spectrum display ?


Much thanks,
Bob

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

John Dusek
 

Thank you – in our market (Dallas TX region) there are no strong transmitters within 20 miles of my location.

 

I’ll try it and see.

 

 

From: airspy@groups.io [mailto:airspy@groups.io] On Behalf Of prog
Sent: Thursday, March 26, 2020 3:35 PM
To: airspy@groups.io
Subject: Re: [airspy] AirSpy You Loop Passive Magnetic Loop antenna ?

 

On Thu, Mar 26, 2020 at 09:27 PM, John Dusek wrote:

What would be the downside of this mod if I also used the HF+ with a long wire (50 ohm, 135ft)?

I depends on your RF environment. For example, if there are any strong MW transmitters nearby. In general this doesn't pose any problems.
Better try by yourself.

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

prog
 

On Thu, Mar 26, 2020 at 09:27 PM, John Dusek wrote:
What would be the downside of this mod if I also used the HF+ with a long wire (50 ohm, 135ft)?
I depends on your RF environment. For example, if there are any strong MW transmitters nearby. In general this doesn't pose any problems.
Better try by yourself.

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

John Dusek
 

Thank you.

 

What would be the downside of this mod if I also used the HF+ with a long wire (50 ohm, 135ft)?

 

 

 

From: airspy@groups.io [mailto:airspy@groups.io] On Behalf Of prog
Sent: Thursday, March 26, 2020 2:22 PM
To: airspy@groups.io
Subject: Re: [airspy] AirSpy You Loop Passive Magnetic Loop antenna ?

 

DC should not be injected anyway. That said there are a couple of 4 x diodes back to back plus a TVS diode for ESD protection. If you are planning to use this loop permanently, you can have the bypass done easily. Just solder a tiny wire on top the R3. You can revert by removing the wire.
The HF+ Discovery doesn't require any of these manipulations.

Re: That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp

jdow
 

I have a lot of rtlsdr dongles. My chief use for SDRSharp is to use one of those dongles that is on an FM Yagi with NEAR line of sight to Mt. Wilson where all the transmitters live. I use it for background music feeding a dongle sound card. (With my ears that's plenty good enough. Don't get old!) It takes an almost annoying length of time for SDRSharp to get it's head together. Polling rtlsdr dongles takes a long time the way SDRSharp does it.

{^_^}

On 20200326 11:45:23, DXer wrote:
On Thu, Mar 26, 2020 at 02:21 PM, Neale Wade wrote:
I can drag it aside like any software logo screen
The plot thickens. Are you saying it does not go away after a couple of seconds?
Vince

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

prog
 

DC should not be injected anyway. That said there are a couple of 4 x diodes back to back plus a TVS diode for ESD protection. If you are planning to use this loop permanently, you can have the bypass done easily. Just solder a tiny wire on top the R3. You can revert by removing the wire.
The HF+ Discovery doesn't require any of these manipulations.

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

John Dusek
 

If bypassing with a direct connection, will that be risky to the HF+ in operation?

 

The main reason I have never performed a mod is I was afraid that effectively capacitor from the circuit would expose the HF+ to random harmful DC charges.

 

From: airspy@groups.io [mailto:airspy@groups.io] On Behalf Of prog
Sent: Thursday, March 26, 2020 2:09 PM
To: airspy@groups.io
Subject: Re: [airspy] AirSpy You Loop Passive Magnetic Loop antenna ?

 

If not bypassed, only the SW bands are OK. MW would be attenuated.
But once bypassed, you get a very good performance.

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

prog
 

If not bypassed, only the SW bands are OK. MW would be attenuated.
But once bypassed, you get a very good performance.

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

John Dusek
 

Based on this comment, will an unmodified (no R3 modification)  original HF+ also work well with no amplification?

 

I read on the Airspy website (on the page with the antenna drawing) that to use the YouLoop most effectively with HF+, the R3 needed to be bypassed, but that’s the only place I have seen that referenced.

 

From: airspy@groups.io [mailto:airspy@groups.io] On Behalf Of prog
Sent: Thursday, March 26, 2020 12:01 PM
To: airspy@groups.io
Subject: Re: [airspy] AirSpy You Loop Passive Magnetic Loop antenna ?

 

It's not intuitive until you see the Z plot. Btw, that's why it works with the HF+ Discovery without extra amplification.
The high impedance of the preamp we are discussing flattens the overall gain because the antenna is not loaded. Things look differently when you have a high Z input.
The most important aspect now is to get the preamp with these specs right. It's funny how this design has gain only in the VLF/LF/HF bands without any tuned circuits.

Re: That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp

jdow
 

On 20200326 10:40:56, DXer wrote:
On Thu, Mar 26, 2020 at 11:09 AM, Keith McGinnis wrote:
Mine appears as SDR# opens but disappears once it's fully loaded.
I was not the only one wondering then. Same here. What seems to be the problem? It's no like it's a 'nag' screen, one that requires the user to click on something for it to go away.
Vince
It is known as a splash screen among programmers. It lets you know the program is started while it figures out all the data it needs before it can show it's GUI correctly. This includes searching for working dongles and things of that sort.

{^_^}

Re: That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp

neale.wade@...
 

I can drag it aside like any software logo screen


From: airspy@groups.io <airspy@groups.io> on behalf of DXer <hfdxmonitor@...>
Sent: Thursday, March 26, 2020 10:40:56 AM
To: airspy@groups.io <airspy@groups.io>
Subject: Re: [airspy] That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp
 
On Thu, Mar 26, 2020 at 11:09 AM, Keith McGinnis wrote:
Mine appears as SDR# opens but disappears once it's fully loaded.
I was not the only one wondering then. Same here. What seems to be the problem? It's no like it's a 'nag' screen, one that requires the user to click on something for it to go away.

Vince

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

prog
 

It's not intuitive until you see the Z plot. Btw, that's why it works with the HF+ Discovery without extra amplification.
The high impedance of the preamp we are discussing flattens the overall gain because the antenna is not loaded. Things look differently when you have a high Z input.
The most important aspect now is to get the preamp with these specs right. It's funny how this design has gain only in the VLF/LF/HF bands without any tuned circuits.

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

Martin - G8JNJ
 

Ahh......

Like Joanne, I had wondered about the amplifier input Z, however if the loop has a self resonance in the region of 4MHz then I guess the higher impedance is significant.

However I can't help wondering if a slightly lower value of input Z would reduce the Q of the loop, and therefore make the resonant  'peak' slightly flatter and the overall sensitivity a bit more consistent over a wider frequency range.

Regards,

Martin

Re: That AirSpy Logo Question: How To Prohibit It From Appearing, Please ? #sdrsharp

Keith McGinnis
 

Mine appears as SDR# opens but disappears once it's fully loaded.

Keith

On 3/25/2020 6:00 PM, Edward MacDonald wrote:
Sorry. *is hard coded.
On Wed., Mar. 25, 2020, 4:00 p.m. Edward MacDonald, <edwardmacdonald74@... <mailto:edwardmacdonald74@...>> wrote:
You can't. It ushard coded into the app. If you need more screen
real estate try increasing your screen resolution.
On Wed., Mar. 25, 2020, 3:53 p.m. rmrrgs, <rgsrose@...
<mailto:rgsrose@...>> wrote:
Hi,
Here's a real technical question !!
New SDR# user. Using W10
How do I prohibit that very nice, well done, AirSpy Logo from
appearing
and taking up a good portion of my monitor viewing area, please ?
Not so much getting rid of it; would like to prohibit it from
appearing in the first place, at all.
Thanks,
Bob

Re: AirSpy You Loop Passive Magnetic Loop antenna ? #airspydiscovery

prog
 
Edited

On Thu, Mar 26, 2020 at 03:13 PM, jdow wrote:
Typically for a small loop antenna you want a very low input impedance. So you probably should consider both input noise voltage and input noise current in a common base or gate configuration.

{o.o}
That's not how this loop works. Hint:

https://airspy.com/downloads/youloop_impedance.png