Date   

Re: Minimizing CPU load

Siegfried Jackstien
 

on hp

download lates BETA

dg9bfc sigi

Am 19.03.2022 um 23:01 schrieb N2MS:

Where can I find this 3.1, March 18th, 2022, Build 2547 build? The latest I've seen form Simon is March 11.

Mike N2MS
On 03/19/2022 5:19 PM Curt Faulk <curt.faulk2+airspy@...> wrote:


Are you running the latest version? Have you checked?

3.1 is actually very light on CPU usage. Mine is often 2% maybe 4%.

3.1, March 18th, 2022, Build 2547 is the latest.
_._,_._,_


Re: Minimizing CPU load

N2MS
 

Where can I find this 3.1, March 18th, 2022, Build 2547 build? The latest I've seen form Simon is March 11.

Mike N2MS

On 03/19/2022 5:19 PM Curt Faulk <curt.faulk2+airspy@...> wrote:


Are you running the latest version? Have you checked?

3.1 is actually very light on CPU usage. Mine is often 2% maybe 4%.

3.1, March 18th, 2022, Build 2547 is the latest.
_._,_._,_


Re: Minimizing CPU load

David De Coons
 

If you are using the on board Intel video in the Dell then you can install an Nvidia graphics card and SDR Console will utilize the CUDA cores on the GPU to reduce CPU load. 

Dave wo2x

Sent from my waxed string and tin cans. 

On Mar 19, 2022, at 5:04 PM, n6vl via groups.io <n6vl@...> wrote:



I've been trying out Ham Radio Deluxe Logbook recently and noticed it can be quite sluggish. Traced the problem down to SDR Console itself. It seems like running SDR Console is enough significantly slow down HRD Logbook and also Log4OM as well.

I absolutely prefer SDR Console over SDRUno. My hardware is SDRPlay Duo. SDRUno does NOT degrade the logbook software performance, but it's NOT my preferred panadapter software. My rig is a Yaesu FTDX3000. My PC is a Dell OptiPlex with an i7 quad core and 16 GB RAM.

Are there settings on SDR Console I can tweak to reduce its CPU load?

de Steve N6VL


Re: Minimizing CPU load

Curt Faulk
 

Are you running the latest version? Have you checked?

3.1 is actually very light on CPU usage. Mine is often 2% maybe 4%.

3.1, March 18th, 2022, Build 2547 is the latest.


Minimizing CPU load

n6vl
 

I've been trying out Ham Radio Deluxe Logbook recently and noticed it can be quite sluggish. Traced the problem down to SDR Console itself. It seems like running SDR Console is enough significantly slow down HRD Logbook and also Log4OM as well.

I absolutely prefer SDR Console over SDRUno. My hardware is SDRPlay Duo. SDRUno does NOT degrade the logbook software performance, but it's NOT my preferred panadapter software. My rig is a Yaesu FTDX3000. My PC is a Dell OptiPlex with an i7 quad core and 16 GB RAM.

Are there settings on SDR Console I can tweak to reduce its CPU load?

de Steve N6VL


Re: Continuum mode

Siegfried Jackstien
 

If sampled with 2. 688 in pluto also downscale to anything smaller
Be it 500 kc (transponder bw)
Down to 1hz (or calculated /referenced down to that fine resolution)
Could be very useful to measure channel power etc


Am 19.03.2022 20:24 schrieb sm6fhz <ingolf.fhz@...>:

Hi.

I took the liberty to collect the specification points we have been throwing around here in this thread for a week or so, in one bulleted list.
I hope it makes it easier to have all of them in one place.
I also added a few new ones that I came to think about at the end.

  • The function should be in an separate, dockable, window as most other function in SDR Console are
  • The function should be possible to run in parallel with the regular spectrum and waterfall displays
  • The function shall measure and display the total power in an defined band width e.g. the full sampled band width as a function of time. The band width could be possible to set to a more narrow value, if possible to implement.
    • The time scale (number of samples per second) shall be possible to set from "real time" to monitoring the sky pass an antenna beam over several hours (24?)
  • It should be possible to set the post detection integration time (smoothing)
  • The vertical scale (level) should be possible to adjust from 0.05 dB per division to say 10 dB per division
  • The horizontal scale (time) could run left to right or right to left to your preference (optional)
  • It shall be possible to save the data to file (.csv) if you like, for post processing in Matlab or Excel
  • Possibility to set a smaller BW for the measurement than the sampled BW and to set where this BW shall be in frequency (within the sampled range).
  • The cursor (when moved into the plot) to show the actual indicated value at its position in the graph. Where it shall show can be discussed, but close to the cursor would be one possibility. There are probably many alternatives where to show the number.
  • Include a "Screenshot" camera in the window, if possible. It would be a practical feature.
  • Some kind of "Time markers" in the graph, similar to the ones in SDRC waterfall.
 
We have probably missed a few anyway, but the better specified it is from the start the less work, and rework, it will create.
Save on time and effort. The programmer needs to get a lesser work load :-)

When a Beta is available I am ready to and more than happy to start making tests.

73 / Ingolf, SM6FHZ


Re: shipping update from Apache regarding the Hermes

sm6fhz
 

Thank you very much for the info Conrad!
73 / Ingolf


Re: Continuum mode

sm6fhz
 

Hi.

I took the liberty to collect the specification points we have been throwing around here in this thread for a week or so, in one bulleted list.
I hope it makes it easier to have all of them in one place.
I also added a few new ones that I came to think about at the end.

  • The function should be in an separate, dockable, window as most other function in SDR Console are
  • The function should be possible to run in parallel with the regular spectrum and waterfall displays
  • The function shall measure and display the total power in an defined band width e.g. the full sampled band width as a function of time. The band width could be possible to set to a more narrow value, if possible to implement.
    • The time scale (number of samples per second) shall be possible to set from "real time" to monitoring the sky pass an antenna beam over several hours (24?)
  • It should be possible to set the post detection integration time (smoothing)
  • The vertical scale (level) should be possible to adjust from 0.05 dB per division to say 10 dB per division
  • The horizontal scale (time) could run left to right or right to left to your preference (optional)
  • It shall be possible to save the data to file (.csv) if you like, for post processing in Matlab or Excel
  • Possibility to set a smaller BW for the measurement than the sampled BW and to set where this BW shall be in frequency (within the sampled range).
  • The cursor (when moved into the plot) to show the actual indicated value at its position in the graph. Where it shall show can be discussed, but close to the cursor would be one possibility. There are probably many alternatives where to show the number.
  • Include a "Screenshot" camera in the window, if possible. It would be a practical feature.
  • Some kind of "Time markers" in the graph, similar to the ones in SDRC waterfall.
 
We have probably missed a few anyway, but the better specified it is from the start the less work, and rework, it will create.
Save on time and effort. The programmer needs to get a lesser work load :-)

When a Beta is available I am ready to and more than happy to start making tests.

73 / Ingolf, SM6FHZ


Re: Continuum mode

Nick Hall-Patch
 

Great news, Simon, and glad that Moe was able to help.  He must have a better memory, or more organized files than I ever had.

It would be wonderful if you could document the algorithm that you will use for your realization of the continuum function, even in the most basic fashion, for those who are curious about what goes on behind the curtain.

Nick



At 16:04 2022-03-19, Simon Brown wrote:

So,


Spoke with Moe, I now know all I must do when I restart programming.


Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon BrownSent: 17 March 2022 16:07To: main@SDR-Radio.groups.ioSubject: Re: [SDR-Radio] Continuum mode

Â

Hi Nick,

Â

I’ll ask Moe.

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Nick Hall-Patch via groups.ioSent: 17 March 2022 16:05To: main@SDR-Radio.groups.io; main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

That would be my understanding also, and easy to test in SpectraVue.I've just played back a NetSDR file in Continuum mode, 1300kHz span of the MW band, using 2048 point FFT and 2097152 point FFTs.Except that the 2048 point playback zips by very quickly (unsurprisingly), it jitters around -32 dBm, while the 2097152 point playback is more sedate in speed, and with very little change in the -32 dBm value, again unsurprisingly.The "jitter" is presumably real, as the power level of individual signals in the night-time MW band is constantly changing.If the commenting in SpectraVue's code is anything like what was in Moe's SDR14xApp, and CuteSDR,  he probably tells you what he's doing right there.   Finding it might be another thing.NickAt 13:18 2022-03-17, Tony_AD0VC wrote:

I wouldn't think that the RBW matters for this. Just sum all X bins. If RBW is smaller then X will be bigger and there will be less power in each bin. Sum of the bins will be the same for a given total bandwidth.Tony

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > on behalf of Simon Brown <simon@...> Sent: Thursday, March 17, 2022 4:45 AM To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > Subject: Re: [SDR-Radio] Continuum mode  Typo. Given:
Center frequency & bandwidth with have a count of FFT bins = X (values in dBm)
Resolution bandwidth = Y Hz
 What’s the formula for the actual continuum value when these X bins are used? Simon Brown, G4ELIhttps://www.sdr-radio.com  From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Simon Brown Sent: 17 March 2022 10:39 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode So, Given:
Center frequency & bandwidth è Count of FFT bins = X (values in dBm)
Resolution bandwidth = Y Hz
 What’s the formula for the actual continuum value when these X bins are used? Simon Brown, G4ELIhttps://www.sdr-radio.com  From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Conrad, PA5Y Sent: 17 March 2022 09:49 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode Hello Simon, I really appreciate you adding this feature. I do have SpectraVue and an SDR-IP and in the past like Charles I used SDRC with Perseus and the IQ outputs as inputs for SpectraVue. Very cumbersome!  Let’s get it working and then I have some other ideas. This will be really useful. 73 Conrad PA5Y From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Simon Brown via groups.io Sent: 15 March 2022 06:42 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode Hi, That’s fine. I can get almost all work done, then there’s fine tuning. I think a docking window like the Signal History is the correct solution. Simon Brown, G4ELIhttps://www.sdr-radio.com  From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of sm6fhz Sent: 14 March 2022 21:48 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode Hi. Here is an early message (May 2014) with an tentative short-spec for the Continuum Mode: https://sdr-radio.groups.io/g/main/message/23048 73 / Ingolf, SM6FHZ -- - + - + -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.

Nick Hall-PatchVictoria, BCCanada

--

- + - + -

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.

Nick Hall-Patch
Victoria, BC
Canada


Re: Continuum mode

Simon Brown
 

So,

 

Spoke with Moe, I now know all I must do when I restart programming.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 17 March 2022 16:07
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hi Nick,

 

I’ll ask Moe.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Nick Hall-Patch via groups.io
Sent: 17 March 2022 16:05
To: main@SDR-Radio.groups.io; main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

That would be my understanding also, and easy to test in SpectraVue.

I've just played back a NetSDR file in Continuum mode, 1300kHz span of the MW band, using 2048 point FFT and 2097152 point FFTs.

Except that the 2048 point playback zips by very quickly (unsurprisingly), it jitters around -32 dBm, while the 2097152 point playback is more sedate in speed, and with very little change in the -32 dBm value, again unsurprisingly.

The "jitter" is presumably real, as the power level of individual signals in the night-time MW band is constantly changing.

If the commenting in SpectraVue's code is anything like what was in Moe's SDR14xApp, and CuteSDR,  he probably tells you what he's doing right there.   Finding it might be another thing.

Nick




At 13:18 2022-03-17, Tony_AD0VC wrote:

I wouldn't think that the RBW matters for this. Just sum all X bins. If RBW is smaller then X will be bigger and there will be less power in each bin. Sum of the bins will be the same for a given total bandwidth.
Tony


From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Simon Brown <simon@...> Sent: Thursday, March 17, 2022 4:45 AM To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Subject: Re: [SDR-Radio] Continuum mode
Â

Typo.

Â

Given:

  • Center frequency & bandwidth with have a count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz


Â

What’s the formula for the actual continuum value when these X bins are used?

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown Sent: 17 March 2022 10:39 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

So,

Â

Given:

  • Center frequency & bandwidth è Count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz


Â

What’s the formula for the actual continuum value when these X bins are used?

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Conrad, PA5Y Sent: 17 March 2022 09:49 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hello Simon, I really appreciate you adding this feature. I do have SpectraVue and an SDR-IP and in the past like Charles I used SDRC with Perseus and the IQ outputs as inputs for SpectraVue. Very cumbersome!

Â

Let’s get it working and then I have some other ideas.

Â

This will be really useful.

Â

73

Â

Conrad PA5Y

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Simon Brown via groups.io Sent: 15 March 2022 06:42 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hi,

Â

That’s fine. I can get almost all work done, then there’s fine tuning. I think a docking window like the Signal History is the correct solution.

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of sm6fhz Sent: 14 March 2022 21:48 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hi. Here is an early message (May 2014) with an tentative short-spec for the Continuum Mode: https://sdr-radio.groups.io/g/main/message/23048 73 / Ingolf, SM6FHZ

--

- + - + -

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.

Nick Hall-Patch
Victoria, BC
Canada


--

- + - + -

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: shipping update from Apache regarding the Hermes

Andrew, K7UL
 

Hi Conrad,

Thanks for sharing that.  I also have one on order.  Some rumors have been circulating around hinting that it might be delayed.  I am sure they will get it figured out.


Re: K4 and SDR-Console

Fred
 

Conrad,
Thank you
I figured this question would come up.

The K4 does have a beautiful display and I do use it.
I have a video capture card and route the HDMI port on the K4 to my PC and then can use Windows camera app to view the K4 screen.
And that works great I can move the window around resize it full screen etc.

But it's nice to have options and I use the SDR-Console memories.
I switch back and forth.
And I like SDR-Console look to.
I also use SDRUno to.
And probably a little of old habits die hard to.

I'm playing around now in the BARTG RTTY contest today and the K4 waterfall band scope and also the Mini-pan are great for FSK rtty.

Thanks 73
Fred KB4QZH


shipping update from Apache regarding the Hermes

Conrad, PA5Y
 

I received this from Apache regarding shipment of the 14-bit Hermes that several users are waiting for.

 

73

 

Conrad PA5Y

 

From: support@... <support@...>
Sent: 19 March 2022 12:56
To: Conrad PA5Y <g0ruz@...>
Subject: RE: Apache Labs Order Detail - AC-3492

 

Hello Conrad,

 

The shipping of this run is delayed by a few weeks, there will be an update on the web site shortly,

 

Regards,

 

Tony,

 

Apache Labs Support

 

 

20 Eva Avenue,

Point Cook, VIC, 3030

Australia.

Email: support@...

Website: www.apache-labs.com

 

 

 

From: Conrad PA5Y <g0ruz@...>
Sent: Thursday, 17 March 2022 8:41 PM
To: Apache Labs <
support@...>
Subject: RE: Apache Labs Order Detail - AC-3492

 

Hello, I have not had any update on my order for the Hermes, are you still expecting to ship on the 25th March?

 

Regards

 

Conrad Farlow PA5Y

 


Re: K4 and SDR-Console

Conrad, PA5Y
 

Hello Fred.

 

I must ask why you use an RSP2Pro and SDRC when you already have an SDR based radio with a waterfall? Surely the K4 has a much better receiver. Is the K4 waterfall poor?

 

I use SDRC as a band-scope with my TS-890S and K3S in conjunction with a Perseus because it knocks spots off the TS-890S waterfall and of course the K3S does not have this facility. Is it the same with the K4?

 

Regards

 

Conrad PA5Y

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Fred via groups.io
Sent: 19 March 2022 13:39
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] K4 and SDR-Console

 

Anyone using the Elecraft K4 with SDR-Consloe?

I'm have a small problem.
When I have SDR-Console running then I start the K4 up it puts the K4 into transmit for a few seconds.
When I start the K4 first then start SDR-Console this doesn't happen.

Any have any thoughts on why this happens?
And yes I know one answer is "just don't start SDR-Console first".

I am using SDRPlay RSP2Pro.

Thanks 73
Fred KB4QZH


K4 and SDR-Console

Fred
 

Anyone using the Elecraft K4 with SDR-Consloe?

I'm have a small problem.
When I have SDR-Console running then I start the K4 up it puts the K4 into transmit for a few seconds.
When I start the K4 first then start SDR-Console this doesn't happen.

Any have any thoughts on why this happens?
And yes I know one answer is "just don't start SDR-Console first".

I am using SDRPlay RSP2Pro.

Thanks 73
Fred KB4QZH


Re: Continuum mode

Simon Brown
 

Hi Nick,

 

I’ll ask Moe.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Nick Hall-Patch via groups.io
Sent: 17 March 2022 16:05
To: main@SDR-Radio.groups.io; main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

That would be my understanding also, and easy to test in SpectraVue.

I've just played back a NetSDR file in Continuum mode, 1300kHz span of the MW band, using 2048 point FFT and 2097152 point FFTs.

Except that the 2048 point playback zips by very quickly (unsurprisingly), it jitters around -32 dBm, while the 2097152 point playback is more sedate in speed, and with very little change in the -32 dBm value, again unsurprisingly.

The "jitter" is presumably real, as the power level of individual signals in the night-time MW band is constantly changing.

If the commenting in SpectraVue's code is anything like what was in Moe's SDR14xApp, and CuteSDR,  he probably tells you what he's doing right there.   Finding it might be another thing.

Nick




At 13:18 2022-03-17, Tony_AD0VC wrote:

I wouldn't think that the RBW matters for this. Just sum all X bins. If RBW is smaller then X will be bigger and there will be less power in each bin. Sum of the bins will be the same for a given total bandwidth.
Tony


From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Simon Brown <simon@...> Sent: Thursday, March 17, 2022 4:45 AM To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Subject: Re: [SDR-Radio] Continuum mode
Â

Typo.

Â

Given:

  • Center frequency & bandwidth with have a count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz


Â

What’s the formula for the actual continuum value when these X bins are used?

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown Sent: 17 March 2022 10:39 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

So,

Â

Given:

  • Center frequency & bandwidth è Count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz


Â

What’s the formula for the actual continuum value when these X bins are used?

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Conrad, PA5Y Sent: 17 March 2022 09:49 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hello Simon, I really appreciate you adding this feature. I do have SpectraVue and an SDR-IP and in the past like Charles I used SDRC with Perseus and the IQ outputs as inputs for SpectraVue. Very cumbersome!

Â

Let’s get it working and then I have some other ideas.

Â

This will be really useful.

Â

73

Â

Conrad PA5Y

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Simon Brown via groups.io Sent: 15 March 2022 06:42 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hi,

Â

That’s fine. I can get almost all work done, then there’s fine tuning. I think a docking window like the Signal History is the correct solution.

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of sm6fhz Sent: 14 March 2022 21:48 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hi. Here is an early message (May 2014) with an tentative short-spec for the Continuum Mode: https://sdr-radio.groups.io/g/main/message/23048 73 / Ingolf, SM6FHZ

--

- + - + -

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.

Nick Hall-Patch
Victoria, BC
Canada


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


Re: Continuum mode

Nick Hall-Patch
 

That would be my understanding also, and easy to test in SpectraVue.

I've just played back a NetSDR file in Continuum mode, 1300kHz span of the MW band, using 2048 point FFT and 2097152 point FFTs.

Except that the 2048 point playback zips by very quickly (unsurprisingly), it jitters around -32 dBm, while the 2097152 point playback is more sedate in speed, and with very little change in the -32 dBm value, again unsurprisingly.

The "jitter" is presumably real, as the power level of individual signals in the night-time MW band is constantly changing.

If the commenting in SpectraVue's code is anything like what was in Moe's SDR14xApp, and CuteSDR,  he probably tells you what he's doing right there.   Finding it might be another thing.

Nick




At 13:18 2022-03-17, Tony_AD0VC wrote:

I wouldn't think that the RBW matters for this. Just sum all X bins. If RBW is smaller then X will be bigger and there will be less power in each bin. Sum of the bins will be the same for a given total bandwidth.
Tony

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Simon Brown <simon@...> Sent: Thursday, March 17, 2022 4:45 AM To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Subject: Re: [SDR-Radio] Continuum mode
Â

Typo.

Â

Given:
  • Center frequency & bandwidth with have a count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz

Â

What’s the formula for the actual continuum value when these X bins are used?

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown Sent: 17 March 2022 10:39 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

So,

Â

Given:
  • Center frequency & bandwidth è Count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz

Â

What’s the formula for the actual continuum value when these X bins are used?

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Conrad, PA5Y Sent: 17 March 2022 09:49 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hello Simon, I really appreciate you adding this feature. I do have SpectraVue and an SDR-IP and in the past like Charles I used SDRC with Perseus and the IQ outputs as inputs for SpectraVue. Very cumbersome!

Â

Let’s get it working and then I have some other ideas.

Â

This will be really useful.

Â

73

Â

Conrad PA5Y

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of Simon Brown via groups.io Sent: 15 March 2022 06:42 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hi,

Â

That’s fine. I can get almost all work done, then there’s fine tuning. I think a docking window like the Signal History is the correct solution.

Â

Simon Brown, G4ELI

https://www.sdr-radio.com

Â

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io > On Behalf Of sm6fhz Sent: 14 March 2022 21:48 To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] Continuum mode

Â

Hi. Here is an early message (May 2014) with an tentative short-spec for the Continuum Mode: https://sdr-radio.groups.io/g/main/message/23048 73 / Ingolf, SM6FHZ

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Nick Hall-Patch
Victoria, BC
Canada


Re: Continuum mode

Tony_AD0VC
 

I wouldn't think that the RBW matters for this. Just sum all X bins. If RBW is smaller then X will be bigger and there will be less power in each bin. Sum of the bins will be the same for a given total bandwidth.

Tony

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Simon Brown <simon@...>
Sent: Thursday, March 17, 2022 4:45 AM
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: Re: [SDR-Radio] Continuum mode
 

Typo.

 

Given:

  • Center frequency & bandwidth with have a count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz

 

What’s the formula for the actual continuum value when these X bins are used?

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 17 March 2022 10:39
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

So,

 

Given:

  • Center frequency & bandwidth è Count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz

 

What’s the formula for the actual continuum value when these X bins are used?

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Conrad, PA5Y
Sent: 17 March 2022 09:49
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hello Simon, I really appreciate you adding this feature. I do have SpectraVue and an SDR-IP and in the past like Charles I used SDRC with Perseus and the IQ outputs as inputs for SpectraVue. Very cumbersome!

 

Let’s get it working and then I have some other ideas.

 

This will be really useful.

 

73

 

Conrad PA5Y

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown via groups.io
Sent: 15 March 2022 06:42
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hi,

 

That’s fine. I can get almost all work done, then there’s fine tuning. I think a docking window like the Signal History is the correct solution.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of sm6fhz
Sent: 14 March 2022 21:48
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hi.
Here is an early message (May 2014) with an tentative short-spec for the Continuum Mode:
https://sdr-radio.groups.io/g/main/message/23048
73 / Ingolf, SM6FHZ


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


Re: Continuum mode

jdow
 

Figure one signal is present, a unit gain (0 dBfs) sinewave. Without shaping it will appear in one or two bins ideally. You take the power level for all bins within the bandwidth Y and sum their power, not voltage, of course. It's independent of the X bandwidth. Scaling would be the same as you use for the spectrum display.

Or take the FFT array of values, multiply each cell by your calculated IF filter shape, pick a bundle of values around the center of the filter to get a nice power of two bin count, take reverse FFT, pseudo power = I^2 + Q^2, Nominally ir should have scaling to make that come out as 0 dBfs for that single sinewave signal. Then the real world should sort of fall out of what you have with no further work. (Yes, I am fixated on I^2 + Q^2 pseudo power.)

{O.-}

On 20220317 03:45:40, Simon Brown wrote:

Typo.

 

Given:

  • Center frequency & bandwidth with have a count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz

 

What’s the formula for the actual continuum value when these X bins are used?

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 17 March 2022 10:39
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

So,

 

Given:

  • Center frequency & bandwidth è Count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz

 

What’s the formula for the actual continuum value when these X bins are used?

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Conrad, PA5Y
Sent: 17 March 2022 09:49
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hello Simon, I really appreciate you adding this feature. I do have SpectraVue and an SDR-IP and in the past like Charles I used SDRC with Perseus and the IQ outputs as inputs for SpectraVue. Very cumbersome!

 

Let’s get it working and then I have some other ideas.

 

This will be really useful.

 

73

 

Conrad PA5Y

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown via groups.io
Sent: 15 March 2022 06:42
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hi,

 

That’s fine. I can get almost all work done, then there’s fine tuning. I think a docking window like the Signal History is the correct solution.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of sm6fhz
Sent: 14 March 2022 21:48
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hi.
Here is an early message (May 2014) with an tentative short-spec for the Continuum Mode:
https://sdr-radio.groups.io/g/main/message/23048
73 / Ingolf, SM6FHZ


--

- + - + -

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: Continuum mode

Simon Brown
 

Typo.

 

Given:

  • Center frequency & bandwidth with have a count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz

 

What’s the formula for the actual continuum value when these X bins are used?

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 17 March 2022 10:39
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

So,

 

Given:

  • Center frequency & bandwidth è Count of FFT bins = X (values in dBm)
  • Resolution bandwidth = Y Hz

 

What’s the formula for the actual continuum value when these X bins are used?

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Conrad, PA5Y
Sent: 17 March 2022 09:49
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hello Simon, I really appreciate you adding this feature. I do have SpectraVue and an SDR-IP and in the past like Charles I used SDRC with Perseus and the IQ outputs as inputs for SpectraVue. Very cumbersome!

 

Let’s get it working and then I have some other ideas.

 

This will be really useful.

 

73

 

Conrad PA5Y

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown via groups.io
Sent: 15 March 2022 06:42
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hi,

 

That’s fine. I can get almost all work done, then there’s fine tuning. I think a docking window like the Signal History is the correct solution.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of sm6fhz
Sent: 14 March 2022 21:48
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Continuum mode

 

Hi.
Here is an early message (May 2014) with an tentative short-spec for the Continuum Mode:
https://sdr-radio.groups.io/g/main/message/23048
73 / Ingolf, SM6FHZ


--

- + - + -

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.