Date   

Re: SNR meter, bandwidth and gain adjustment for transverters

jdow
 

The description seemed unclear to me. I "think" it is a tool for pulsars. It more or less shows a spectrum plot with the spectra taken at specific time intervals relative to the pulsar rate and lined up in a waterfall. Does that sound right? That sounds VERY useful. I learned something. Thanks.

(And I played with the trig. At least for AM summing the spectral elements power does give back the known power that went into generating the waveform. I have to do one more expansion to settle my mind. I still think I^2+Q^2 on the IF filter output is the simple method in most SDRs.)

{^_^}

On 20210705 22:24:48, Simon Brown wrote:
Nope,

Continuum mode is similar to what's being request here I think, it's used in
radio astronomy and supported in SpectraVue.

http://www.rfspace.com/RFSPACE/Astronomy.html

It really is a real thing.

Simon Brown, G4ELI
https://www.sdr-radio.com 

-----Original Message-----
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Bob
Dengler
Sent: 06 July 2021 00:07
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for
transverters

At 7/5/2021 03:28 PM, you wrote:
WTFF is "Continuum mode". You are losing your audience by inventing terms
that make no sense. Do you mean time domain where everything flows along in
a sampled stream? If so then time domain makes more sense to the engineers
designing things. It's instantly understandable. {+_+} 

I thought perhaps he was referring to omnipotent signals.

-Q 












Editing Favorites

Dominic Dambro
 

I'm an avid SWLer and my main area of interest is the amateur bands. Is there a way to edit my favorites to fine-tune the amateur bands into voice-only? For example, the 40 meter amateur band favorite brings up the entire sprectrum of 7.0 to 7.3 MHz. I just want it to display a more spread out 7.125 to 7.3 MHz.

Thanks,
Dominic


Re: SNR meter, bandwidth and gain adjustment for transverters

Gedas
 

Integrating all the threads from 0 > infinity we can see that IQ is quickly approaching zero.

Gedas, W8BYA EN70JT

Gallery at http://w8bya.com (under repair)
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
On 7/6/2021 5:05 AM, Alan G4ZFQ wrote:

When you mention coherency do you mean one of these is involved?


Allan,

I've a feeling you are not taking this seriously?
You need two, one for I and one for Q.

73 Alan G4ZFQ






Re: RSPDuo and SDRC

Kriss Kliegle KA1GJU
 

Negative 

73 Kriss KA1GJU/AM


RSPDuo and SDRC

KD7YZ Bob
 

Hello SDR-Console,

I just got an SDRPlay RSPDuo, or is it called RSP2 ? Anyway, I was controlling it with SDRC, loving it ...and wondered if I could also activate the Diversity mode?
I have two different antennas connected, through protection to the RSP2' two antenna jacks.
Using their own SDR-Uno, I can activate Diversity and pipe it to WSJTx.


However I am having issues with SDR-Uno. And mainly, I have tons of memory data stored in my favorite SDRC so want to keep using that.


--
73,
KD7YZ Bob EM88LL


Re: SNR meter, bandwidth and gain adjustment for transverters

Curt Faulk
 

I actually was scoring her as winning.  I'll have to review the score-sheet.


Re: SNR meter, bandwidth and gain adjustment for transverters

Robert Lorenzini
 



On 7/5/2021 8:56 PM, jdow wrote:
S-Meter specifics - I sure as HELL have been specific, twit.

You have just lost the debate. This has become too personal.
Time to let it go.

Bob - wd6dod


Re: SNR meter, bandwidth and gain adjustment for transverters

Simon Brown
 

😊

 

Not that bad, but crap HF / VHF conditions, hardware I need on backorder and lots of software I want to write for myself such as AI components for SDR.

 

2000m^2 garden which I like, lovely place to take the dog for a walk.

 

Need 48 hours a day.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Siegfried Jackstien
Sent: 06 July 2021 11:50
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

losing the will to live?? oh please no!! ... we love your work and loosing you would be a great loss for the ham commnunity

Sigi dg9bfc

Am 06.07.2021 um 07:46 schrieb Simon Brown:

FM power is always constant, this *could* be an area for an averaging signal meter.

 

I’m slowly losing the will to live 😊 .

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of oldjackbob@...
Sent: 06 July 2021 02:47
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

[Edited Message Follows]
[Reason: Initial send occurred for seemingly no reason.]

Joanne,

I probably misspoke at some point if/when I said BCFM carrier is always the greatest power anywhee in teh passband, so I retract any such statement.

However, that statement does hold true for BCAM, so I've captured a video of SDRC's S-meter reporting on a BCAM station:

https://drive.google.com/file/d/1Egb4DyIxXtZNP6rNNKg5PLfQzFTH_7zI/view?usp=sharing

Several key observations:

1) The carrier is very steady.
2) The modulation varies greatly.
3) the passband is intentionally varied between 2.5k and 12k.
4) The S-meter never varies at all (at least not more than .1dB in any direction).
5) The S-meter is reporting ONLY the peak signal detected anywhere in the passband, nothing more and nothing less.

So tell me where Simon gets it wrong.

Nevermind, that's a loaded question...Simon gets it right.

I'm done here,
Mark


--

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


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


Re: SNR meter, bandwidth and gain adjustment for transverters

Matthias Bopp
 

Joanne,

 

I fully agree with you.

 

Mark does not differentiate between time domain and frequency domain.

 

In the time domain peak power is requested, even the time constants are defined by IARU:

“The metering system shall be based on quasi-peak detection with an attack time of 10 ms ± 2 ms and a decay time constant of at least 500 msec.”

 

In the frequency domain the total power in the receive channel needs to be measured.

 

If we want to measure SNR then the total signal power in the receive channel needs to be compared to the total noise power in the receive channel.

 

Kind regards

 

Matthias

 

www.dd1us.de

 

 

Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Im Auftrag von jdow
Gesendet: Dienstag, 6. Juli 2021 12:13
An: main@SDR-Radio.groups.io
Betreff: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

Iaru does not say anything about a spectrum when speaking of the peaks. It is speaking time domain only. You should know that.

{^_^}

On 20210706 02:37:47, oldjackbob@... wrote:

Simon,

Please don't be duped into falling for any "total power" or "summed power" or "average power" trickery. The IARU spec is clear: it's peak (and ONLY PEAK) power that is to be measured. Any such nebulous terms as "total" or "average" or "summed" are not mentioned, let alone defined, in the spec.

IMO there's no need for you to revisit your S-meter algorithm at all. It has been behaving concisely, predictably and exactly per the spec for years. It readout has always matched the scale on the panascope edges (you wouldn't believe the tortured logic I've seen posted as to why other meters don't match the panascope scale, lol).

As you have stated before, if someone wants something other than peak power reported, they want something other than an S-meter.

Thanks for all you do, and I truly am done posting in this thread.

Mark

 


Re: SNR meter, bandwidth and gain adjustment for transverters

Siegfried Jackstien
 

losing the will to live?? oh please no!! ... we love your work and loosing you would be a great loss for the ham commnunity

Sigi dg9bfc

Am 06.07.2021 um 07:46 schrieb Simon Brown:

FM power is always constant, this *could* be an area for an averaging signal meter.

 

I’m slowly losing the will to live 😊 .

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of oldjackbob@...
Sent: 06 July 2021 02:47
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

[Edited Message Follows]
[Reason: Initial send occurred for seemingly no reason.]

Joanne,

I probably misspoke at some point if/when I said BCFM carrier is always the greatest power anywhee in teh passband, so I retract any such statement.

However, that statement does hold true for BCAM, so I've captured a video of SDRC's S-meter reporting on a BCAM station:

https://drive.google.com/file/d/1Egb4DyIxXtZNP6rNNKg5PLfQzFTH_7zI/view?usp=sharing

Several key observations:

1) The carrier is very steady.
2) The modulation varies greatly.
3) the passband is intentionally varied between 2.5k and 12k.
4) The S-meter never varies at all (at least not more than .1dB in any direction).
5) The S-meter is reporting ONLY the peak signal detected anywhere in the passband, nothing more and nothing less.

So tell me where Simon gets it wrong.

Nevermind, that's a loaded question...Simon gets it right.

I'm done here,
Mark


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


Re: SNR meter, bandwidth and gain adjustment for transverters

jdow
 

Iaru does not say anything about a spectrum when speaking of the peaks. It is speaking time domain only. You should know that.

{^_^}

On 20210706 02:37:47, oldjackbob@... wrote:
Simon,

Please don't be duped into falling for any "total power" or "summed power" or "average power" trickery. The IARU spec is clear: it's peak (and ONLY PEAK) power that is to be measured. Any such nebulous terms as "total" or "average" or "summed" are not mentioned, let alone defined, in the spec.

IMO there's no need for you to revisit your S-meter algorithm at all. It has been behaving concisely, predictably and exactly per the spec for years. It readout has always matched the scale on the panascope edges (you wouldn't believe the tortured logic I've seen posted as to why other meters don't match the panascope scale, lol).

As you have stated before, if someone wants something other than peak power reported, they want something other than an S-meter.

Thanks for all you do, and I truly am done posting in this thread.

Mark


Re: SNR meter, bandwidth and gain adjustment for transverters

Allan Isaacs
 

Would you need to synchronise the two tappers Alan?
Maybe a couple of USB3 connections...
Allan G3PIY

-----Original Message-----
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf
Of Alan G4ZFQ
Sent: 06 July 2021 10:05
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for
transverters

When you mention coherency do you mean one of these is involved?
Allan,

I've a feeling you are not taking this seriously?
You need two, one for I and one for Q.

73 Alan G4ZFQ


Re: SNR meter, bandwidth and gain adjustment for transverters

oldjackbob@...
 

Simon,

Please don't be duped into falling for any "total power" or "summed power" or "average power" trickery. The IARU spec is clear: it's peak (and ONLY PEAK) power that is to be measured. Any such nebulous terms as "total" or "average" or "summed" are not mentioned, let alone defined, in the spec.

IMO there's no need for you to revisit your S-meter algorithm at all. It has been behaving concisely, predictably and exactly per the spec for years. It readout has always matched the scale on the panascope edges (you wouldn't believe the tortured logic I've seen posted as to why other meters don't match the panascope scale, lol).

As you have stated before, if someone wants something other than peak power reported, they want something other than an S-meter.

Thanks for all you do, and I truly am done posting in this thread.

Mark


Re: SAQ 17.2 kHz QRV today

PE1OSQ
 
Edited

@Gisle,
somebody else allready posted a link to the newer version.

I got mine directly from the author when we exchanged some emails. I praised his program (I realy think it is great)
and asked for some changes. He explained that he modified an old source written by somebody else. In that
source all the screen handling / lay out seems to be hard coded...
The difference with 0.94 seems to be that when you place the cursor on some frequencies of interest the Callsign
of that station is shown.

The following might be of interest (and I promise Simon I will not ramble on off topic after that)
The article linked by Alan G4ZFQ explains how to listen to SAQ with an e-field probe such as the Mini Whip.
I tried that and also listening to VLF with an upconverter. At first it did not work at all.
Most upconverters (like the NoEelec one) contain DC blocking capacitors in the signal path. Most e-field
probes use a phantom-power-feed that also blocks DC with a capacitor. In most cases these capacitors
are intended for MF and SW use, they attenuate (V)LF signals very much. Once I replaced those capacitors
with much bigger ones (capacity wise...) it worked very well.

regards
Jan / PE1OSQ


Re: SNR meter, bandwidth and gain adjustment for transverters

Alan G4ZFQ
 

When you mention coherency do you mean one of these is involved?
Allan,

I've a feeling you are not taking this seriously?
You need two, one for I and one for Q.

73 Alan G4ZFQ


Re: SNR meter, bandwidth and gain adjustment for transverters

Allan Isaacs
 

When you mention coherency do you mean one of these is involved?

Allan G3PIY

 

 


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of jdow
Sent: 06 July 2021 09:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

I fail utterly to understand that statement. It is coherency effects that can take a 20 MHz wide GPS P/Y-Code signal and coherently reduce it to its baseband 50 Hz bandwidth and decode the ephemeris against a jammer or other noise source that is on the order of 50 dB larger. It is coherency that allows a 200 kHz FM signal to show more than a 10 dB improvement in a 10 kHz bandwidth. The signal components add coherently - as voltage. The noise components add randomly - as power. Doing this in the frequency domain requires you know what is signal and what is noise and appropriately add power or voltage. And that varies with the mode. The energy in the selected passband is a constant. And it is the term that goes into BER calculations for digital modulation schemes.

If I take the spectral components of an FM signal and add them all up treating them the same as noise then there is no gain that comes out of the coherency of the signal, there is no trade-off between bandwidth and SNR. So I don't see how you can simply add up power in a collection of FFT bins to get an accurate power reading. Please elucidate.

{^_^}

 


Re: SNR meter, bandwidth and gain adjustment for transverters

jdow
 

I fail utterly to understand that statement. It is coherency effects that can take a 20 MHz wide GPS P/Y-Code signal and coherently reduce it to its baseband 50 Hz bandwidth and decode the ephemeris against a jammer or other noise source that is on the order of 50 dB larger. It is coherency that allows a 200 kHz FM signal to show more than a 10 dB improvement in a 10 kHz bandwidth. The signal components add coherently - as voltage. The noise components add randomly - as power. Doing this in the frequency domain requires you know what is signal and what is noise and appropriately add power or voltage. And that varies with the mode. The energy in the selected passband is a constant. And it is the term that goes into BER calculations for digital modulation schemes.

If I take the spectral components of an FM signal and add them all up treating them the same as noise then there is no gain that comes out of the coherency of the signal, there is no trade-off between bandwidth and SNR. So I don't see how you can simply add up power in a collection of FFT bins to get an accurate power reading. Please elucidate.

{^_^}

On 20210706 00:12:17, Simon Brown wrote:

Hi,

 

I don’t care about the demodulator, signal strength is just frequency domain stuff. Doesn’t matter what you do with the IQ.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of jdow
Sent: 06 July 2021 07:49
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

I'd need to see math that proves this is the way to handle coherent sidebands as opposed to summing a large number of complex numbers in pairs of matching sidebands. Are you doing something such that no filtered I and Q value is ever present before the demodulator? That is where it's automatic you get the right value.

{o.o}

On 20210705 23:27:05, Simon Brown wrote:

Hi,

 

Frequency, so using the FFT output. The FFT output is in dBm (log10), so has to be converted back from dB using pow(), averaged and then converted back to dB using log10. This is trivial, doesn’t use much CPU at all.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of jdow
Sent: 06 July 2021 07:03
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

Averaging across frequency or time? Across frequency summation is perhaps closer, particularly if you presume it's all noise and simply add power per bin. But with coherent sidebands on a signal you can get surprised simply adding power I suspect. Alas, I do not KNOW that. I figure it's easier to do the I^2 + Q^2 operation on the IF before the demodulator. With that signal and something a bit like your noise averaging the signal strength reading and noise reading could actually help you know if there is enough signal to expect your demodulator to provide something understandable, especially for digital modulation schemes. (I'd take your minimum 10% data, sum the powers (I^2+Q^2) in each bin, divide by number of bins, and multiply back by number of bins in the filter bandwidth to get the noise power estimate. That last could probably be reduced to something close to a constant multiply operation.) This makes WGN environments quite predictable. Other environments suffer in comparison. So if the calculation above gives too low an SNR, or value converted to Eb/N0 is too low, then you know a digital mode is not even worth trying. Of it is high enough you know you have a sporting chance.

{^_^}


On 20210705 22:46:33, Simon Brown wrote:

FM power is always constant, this *could* be an area for an averaging signal meter.

 

I’m slowly losing the will to live 😊 .

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of oldjackbob@...
Sent: 06 July 2021 02:47
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

[Edited Message Follows]
[Reason: Initial send occurred for seemingly no reason.]

Joanne,

I probably misspoke at some point if/when I said BCFM carrier is always the greatest power anywhee in teh passband, so I retract any such statement.

However, that statement does hold true for BCAM, so I've captured a video of SDRC's S-meter reporting on a BCAM station:

https://drive.google.com/file/d/1Egb4DyIxXtZNP6rNNKg5PLfQzFTH_7zI/view?usp=sharing

Several key observations:

1) The carrier is very steady.
2) The modulation varies greatly.
3) the passband is intentionally varied between 2.5k and 12k.
4) The S-meter never varies at all (at least not more than .1dB in any direction).
5) The S-meter is reporting ONLY the peak signal detected anywhere in the passband, nothing more and nothing less.

So tell me where Simon gets it wrong.

Nevermind, that's a loaded question...Simon gets it right.

I'm done here,
Mark


--

- + - + -

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

 


--

- + - + -

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

 


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


Re: SAQ 17.2 kHz QRV today

Allan Isaacs
 

 

This was written a few years ago using my soundcard om.

http://www.radiomuseum.co.uk/vlf.html (complete with a recording!)

Simon’s come a long way since then and SDRs are a tad bit better than the SAQ receiver.

Of course nothing can beat a real receiver with a proper tuning knob and a jack socket for headphones (and a proper S-Meter).

Except perhaps my first venture… a crystal set in a matchbox connected to a pair of high impedance headphones and a really long wire.

Allan G3PIY

 


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of PE1OSQ
Sent: 06 July 2021 00:26
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SAQ 17.2 kHz QRV today

 

Re-

Oh how nice it would be if Simons program would support VLF reception via soundcards
in this way.
The picture below is a screenshot of SAQ Panoramic Receiver playing back the RF recording (0-96kHz)

Note: the GREEN line is the RF spectrum. One of the peaks on the right is DCF. The WHITE (actually BLUE)
line is the audio spectrum. No waterfall.

_._,_._,_

 


Re: SAQ 17.2 kHz QRV today

Alan G4ZFQ
 

Gisle,

Google "SAQ Panoramic Receiver (v0.98)" gets a top link http://www.dl1dbc.net/SAQ/

Alan


Re: SNR meter, bandwidth and gain adjustment for transverters

Simon Brown
 

Hi,

 

I don’t care about the demodulator, signal strength is just frequency domain stuff. Doesn’t matter what you do with the IQ.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of jdow
Sent: 06 July 2021 07:49
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

I'd need to see math that proves this is the way to handle coherent sidebands as opposed to summing a large number of complex numbers in pairs of matching sidebands. Are you doing something such that no filtered I and Q value is ever present before the demodulator? That is where it's automatic you get the right value.

{o.o}

On 20210705 23:27:05, Simon Brown wrote:

Hi,

 

Frequency, so using the FFT output. The FFT output is in dBm (log10), so has to be converted back from dB using pow(), averaged and then converted back to dB using log10. This is trivial, doesn’t use much CPU at all.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of jdow
Sent: 06 July 2021 07:03
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

Averaging across frequency or time? Across frequency summation is perhaps closer, particularly if you presume it's all noise and simply add power per bin. But with coherent sidebands on a signal you can get surprised simply adding power I suspect. Alas, I do not KNOW that. I figure it's easier to do the I^2 + Q^2 operation on the IF before the demodulator. With that signal and something a bit like your noise averaging the signal strength reading and noise reading could actually help you know if there is enough signal to expect your demodulator to provide something understandable, especially for digital modulation schemes. (I'd take your minimum 10% data, sum the powers (I^2+Q^2) in each bin, divide by number of bins, and multiply back by number of bins in the filter bandwidth to get the noise power estimate. That last could probably be reduced to something close to a constant multiply operation.) This makes WGN environments quite predictable. Other environments suffer in comparison. So if the calculation above gives too low an SNR, or value converted to Eb/N0 is too low, then you know a digital mode is not even worth trying. Of it is high enough you know you have a sporting chance.

{^_^}


On 20210705 22:46:33, Simon Brown wrote:

FM power is always constant, this *could* be an area for an averaging signal meter.

 

I’m slowly losing the will to live 😊 .

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of oldjackbob@...
Sent: 06 July 2021 02:47
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SNR meter, bandwidth and gain adjustment for transverters

 

[Edited Message Follows]
[Reason: Initial send occurred for seemingly no reason.]

Joanne,

I probably misspoke at some point if/when I said BCFM carrier is always the greatest power anywhee in teh passband, so I retract any such statement.

However, that statement does hold true for BCAM, so I've captured a video of SDRC's S-meter reporting on a BCAM station:

https://drive.google.com/file/d/1Egb4DyIxXtZNP6rNNKg5PLfQzFTH_7zI/view?usp=sharing

Several key observations:

1) The carrier is very steady.
2) The modulation varies greatly.
3) the passband is intentionally varied between 2.5k and 12k.
4) The S-meter never varies at all (at least not more than .1dB in any direction).
5) The S-meter is reporting ONLY the peak signal detected anywhere in the passband, nothing more and nothing less.

So tell me where Simon gets it wrong.

Nevermind, that's a loaded question...Simon gets it right.

I'm done here,
Mark


--

- + - + -

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

 


--

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

 


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