Date   

Re: IQ Analysis mode

Simon HB9DRV <simon@...>
 

Leif,

 

This is not the way to write a software program.

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of Leif Asbrink

There is no need to read the file size from the header. In Linrad
the header is used only to get the information about how the
recording was made and when it started. Linrad uses the standard
file functions fseek and ftell to find out how big the file is.
The 32 bit size field in the header is ignored.


Re: IQ Analysis mode

Leif Asbrink
 

Hi Simon,

Moe agrees with me that this should not be possible. The internal structure
in a Wave file doesn't allow this, see
http://en.wikipedia.org/wiki/WAV#Limitations .
There is no need to read the file size from the header. In Linrad
the header is used only to get the information about how the
recording was made and when it started. Linrad uses the standard
file functions fseek and ftell to find out how big the file is.
The 32 bit size field in the header is ignored.

Linrad worked this way from start for the simple reason that once
upon the time a 2 GB file was gigantic and I wanted to listen to
the first 128 MB of a file that I could transport with my biggest USB
stick. That would be a corrupted file but Linrad would not know...

73
Leif / SM5BSZ




Anyway if you try and play it, it will probably stop after 248 seconds.



I'll try to reproduce this problem with SV and find a way around this
problem if needed.



Simon Brown, HB9DRV, http://sdr-radio.com



From: sdr-radio-com@... [mailto:sdr-radio-com@...]
On Behalf Of Simon HB9DRV
Sent: 17 November 2010 18:52
To: sdr-radio-com@...
Subject: RE: [sdr-radio-com] IQ Analysis mode





Hi,



You can't have a wave file bigger than 2GB. If you can play it with SV then
there's something odd, probably in my logic. I'll talk with Moe...



If needed I'll create a big file myself to see what's what.



Simon Brown, HB9DRV, http://sdr-radio.com



From: sdr-radio-com@... [mailto:sdr-radio-com@...]
On Behalf Of rfnoise
Sent: 17 November 2010 18:36
To: sdr-radio-com@...
Subject: [sdr-radio-com] IQ Analysis mode





Hello

I have a 12 hour IQ recording made with SVue that I would like to use with
SDR-Radio IQ Analysis feature. But when i load the file into SDR-Radio
instead of showing me that it's 720min and 24GB file it says it's 248
seconds and 142MB. What exactly are the limitations of IQ recordings with
SDR-Radio ?

This recording was made with SDR-IP using 100KHz Bandwidth for a period of
720 min (60min * 12). This is a single file output not multiple chained
files.

I am running SDR-Radio 1.1 build 472.

This what SDR-Radio shows:

Filename Start (UTC) Duration Size Source
----------------------------------------------------------
20101117_043425.wav 11/17/2010 4:34:25 AM 248.361s 142.1 MB SpectraVue 3.0

thanks

Joe
k6sat



Re: IQ Analysis mode

Leif Asbrink
 

Hi Joe,

You should be able play the file in Linrad for high resolution analysis.
http://www.sm5bsz.com/linuxdsp/usage/am1030.htm
Here a 9 gigabyte file is analyzed at different bandwidths from
0.37 Hz down to 0.003 Hz. Each run takes 5 minutes on my fast
computer. That recording was with SDR-IP at 48 kHz sampling rate
in Linrads own format but for all that I know a big 100 kHz .wav
file from SpectraVue should run equally well.

The secret is the define for the compile command (under Wiondows)
CC = C:&#92;mingw&#92;bin&#92;mingw32-gcc -D_FILE_OFFSET_BITS=64
This makes file pointers 64 bit.

73

Leif / SM5BSZ

I have a 12 hour IQ recording made with SVue that I would like to use with SDR-Radio IQ Analysis feature. But when i load the file into SDR-Radio instead of showing me that it's 720min and 24GB file it says it's 248 seconds and 142MB. What exactly are the limitations of IQ recordings with SDR-Radio ?

This recording was made with SDR-IP using 100KHz Bandwidth for a period of 720 min (60min * 12). This is a single file output not multiple chained files.

I am running SDR-Radio 1.1 build 472.

This what SDR-Radio shows:

Filename Start (UTC) Duration Size Source
--------------------------------------------------------------------------
20101117_043425.wav 11/17/2010 4:34:25 AM 248.361s 142.1 MB SpectraVue 3.0

thanks

Joe
k6sat


Re: Console's tuning bar

Simon HB9DRV <simon@...>
 

No transparency options.

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of ic8pof
Sent: 18 November 2010 10:27
To: sdr-radio-com@...
Subject: [sdr-radio-com] Console's tuning bar

 

 

GM Simon.
In the last b472 there are many color options, but I have not understood
if it is possible to change the TB transparency.

What says the User Manual about ?

73
Phil@IC8POF


Console's tuning bar

ic8pof
 

GM Simon.
In the last b472 there are many color options, but I have not understood
if it is possible to change the TB transparency.

What says the User Manual about ?

73
Phil@IC8POF


Re: IQ Analysis mode

Simon HB9DRV <simon@...>
 

Hi Joe,

 

The software will only process enough data to fill the screen. In the 'IQ Data File' window you see the maximum number of lines of data that can be created - if this number is significantly more than the vertical resolution of your monitor increase the FFT size (higher resolution, less lines). I will make this more obvious...

 

Also this window shows the number of files chained together, check that the value shown is indeed 6.

 

You need the User Guide, I started this later last night :)

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of rfnoise@...
Sent: 18 November 2010 03:20
To: sdr-radio-com@...
Subject: Re: [sdr-radio-com] IQ Analysis mode

 

 

Simon

 

I have 6 x 2.5GB files now. 

 

When I use IQ Analysis mode and select the first file, it correctly identifies that there are 6 files but when I begin analyze it seems to just process first file (based on the time stamps on vertical axis). 

 

I have set BW to 1KHz and FFT to 524288. Resolution is 0.191 Hz.

 

What am i missing to get it to process all the files and therefore the entire timespan?

 

thanks,

 

Joe

k6sat

 

 

On Nov 17, 2010, at 10:55 AM, Simon HB9DRV wrote:



 

 

Bad boy, don't change the .ini file!

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of rfnoise

 

Getting file output greater th an 2GB from SVue requires unsupported change to ini file so instead of worrying about this I will just go back to file chaining and try it again.

 

 

 


Re: IQ Analysis mode

rfnoise@gmail.com <rfnoise@...>
 

Pieter

I think the ini file was corrected to original but to make sure I will delete and have SVue recreate it to default. 

Joe

On Nov 17, 2010, at 5:31 PM, RFSPACE wrote:

 

Joe,
 
Not sure. I've done it about 10 times and it seems to grab all of the files. Did you put the .ini file back to normal?
 
Pieter
----- Original Message -----
Sent: Wednesday, November 17, 2010 9:20 PM
Subject: Re: [sdr-radio-com] IQ Analysis mode

 

Simon


I have 6 x 2.5GB files now. 

When I use IQ Analysis mode and select the first file, it correctly identifies that there are 6 files but when I begin analyze it seems to just process first file (based on the time stamps on vertical axis). 

I have set BW to 1KHz and FFT to 524288. Resolution is 0.191 Hz.

What am i missing to get it to process all the files and therefore the entire timespan?

thanks,

Joe
k6sat


On Nov 17, 2010, at 10:55 AM, Simon HB9DRV wrote:




Re: IQ Analysis mode

rfnoise@gmail.com <rfnoise@...>
 

Simon

I have 6 x 2.5GB files now. 

When I use IQ Analysis mode and select the first file, it correctly identifies that there are 6 files but when I begin analyze it seems to just process first file (based on the time stamps on vertical axis). 

I have set BW to 1KHz and FFT to 524288. Resolution is 0.191 Hz.

What am i missing to get it to process all the files and therefore the entire timespan?

thanks,

Joe
k6sat


On Nov 17, 2010, at 10:55 AM, Simon HB9DRV wrote:

 

Bad boy, don't change the .ini file!

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of rfnoise

 

Getting file output greater th an 2GB from SVue requires unsupported change to ini file so instead of worrying about this I will just go back to file chaining and try it again.

 




Re: IQ Analysis mode

RFSPACE
 

Joe,
 
Not sure. I've done it about 10 times and it seems to grab all of the files. Did you put the .ini file back to normal?
 
Pieter

----- Original Message -----
Sent: Wednesday, November 17, 2010 9:20 PM
Subject: Re: [sdr-radio-com] IQ Analysis mode

 

Simon


I have 6 x 2.5GB files now. 

When I use IQ Analysis mode and select the first file, it correctly identifies that there are 6 files but when I begin analyze it seems to just process first file (based on the time stamps on vertical axis). 

I have set BW to 1KHz and FFT to 524288. Resolution is 0.191 Hz.

What am i missing to get it to process all the files and therefore the entire timespan?

thanks,

Joe
k6sat


On Nov 17, 2010, at 10:55 AM, Simon HB9DRV wrote:

 

Bad boy, don't change the .ini file!

Simon Brown, HB9DRV, http://sdr-radio.com

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of rfnoise

Getting file output greater th an 2GB from SVue requires unsupported change to ini file so instead of worrying about this I will just go back to file chaining and try it again.




Re: User guide

Philip
 

Thanks Simon

--- In sdr-radio-com@..., "Simon HB9DRV" <simon@...> wrote:

Hi,



I will write the User Manual next week.



Simon Brown, HB9DRV, http://sdr-radio.com



From: sdr-radio-com@... [mailto:sdr-radio-com@...]
On Behalf Of Philip
Sent: 17 November 2010 15:55
To: sdr-radio-com@...
Subject: [sdr-radio-com] User guide





Hi folks
Is there a user guide/manual for the SDR-Radio software?

Regards
Philip


Re: IQ Analysis mode

Simon HB9DRV <simon@...>
 

Bad boy, don't change the .ini file!

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of rfnoise

 

Getting file output greater than 2GB from SVue requires unsupported change to ini file so instead of worrying about this I will just go back to file chaining and try it again.

 


Re: IQ Analysis mode

rfnoise <rfnoise@...>
 

Yes, exactly. But I will re-try with file chaining and stock INI file.

Joe

On Nov 17, 2010, at 10:26 AM, RFSPACE wrote:


This file is too big. You must have been tricking spectravue.ini ;)



Sent from my iPhone 4


Re: IQ Analysis mode

RFSPACE
 

This file is too big. You must have been tricking spectravue.ini ;)



Sent from my iPhone 4

On Nov 17, 2010, at 12:35 PM, rfnoise <rfnoise@...> wrote:

 

Hello

I have a 12 hour IQ recording made with SVue that I would like to use with SDR-Radio IQ Analysis feature. But when i load the file into SDR-Radio instead of showing me that it's 720min and 24GB file it says it's 248 seconds and 142MB. What exactly are the limitations of IQ recordings with SDR-Radio ?

This recording was made with SDR-IP using 100KHz Bandwidth for a period of 720 min (60min * 12). This is a single file output not multiple chained files.

I am running SDR-Radio 1.1 build 472.

This what SDR-Radio shows:

Filename Start (UTC) Duration Size Source
----------------------------------------------------------
20101117_043425.wav 11/17/2010 4:34:25 AM 248.361s 142.1 MB SpectraVue 3.0

thanks

Joe
k6sat


Re: IQ Analysis mode

rfnoise <rfnoise@...>
 

OK, Well, I have been using single file sizes output from SVue for a long time. Although I must admit this is first time for 12 hours. Maybe I break something in WAV file limits. What's strange is SVue seems to play it back Ok (way beyond 248 seconds).

Getting file output greater than 2GB from SVue requires unsupported change to ini file so instead of worrying about this I will just go back to file chaining and try it again.

thanks

Joe

On Nov 17, 2010, at 10:08 AM, Simon HB9DRV wrote:

 

Moe agrees with me that this should not be possible. The internal structure in a Wave file doesn't allow this, see http://en.wikipedia.org/wiki/WAV#Limitations .

 

Anyway if you try and play it, it will probably stop after 248 seconds.

 

I'll try to reproduce this problem with SV and find a way around this problem if needed.

 

Simon Brown, HB9DRV, http://sdr-rad io.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of Simon HB9DRV
Sent: 17 November 2010 18:52
To: sdr-radio-com@...
Subject: RE: [sdr-radio-com] IQ Analysis mode

 

 

Hi,

 

You can't have a wave file bigger than 2GB. If you can play it with SV then there's something odd, probably in my logic. I'll talk with Moe...

 

If needed I'll create a big file myself to see what's what.

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto :sdr-radio-com@...] On Behalf Of rfnoise
Sent: 17 November 2010 18:36
To: sdr-radio-com@...
Subject: [sdr-radio-com] IQ Analysis mode

 

 

Hello

I have a 12 hour IQ recording made with SVue that I would like to use with SDR-Radio IQ Analysis feature. But when i load the file into SDR-Radio instead of showing me that it's 720min and 24GB file it says it's 248 seconds and 142MB. What exactly are the limitations of IQ recordings with SDR-Radio ?

This recording was made with SDR-IP using 100KHz Bandwidth for a period of 720 min (60min * 12). This is a single file output not multiple chained files.

I am running SDR-Radio 1.1 build 472.

This what SDR-Radio shows:

Filename Start (UTC) Duration Size Source
----------------- -----------------------------------------
20101117_043425.wav 11/17/2010 4:34:25 AM 248.361s 142.1 MB SpectraVue 3.0

thanks

Joe
k6sat




Re: IQ Analysis mode

Simon HB9DRV <simon@...>
 

Moe agrees with me that this should not be possible. The internal structure in a Wave file doesn't allow this, see http://en.wikipedia.org/wiki/WAV#Limitations .

 

Anyway if you try and play it, it will probably stop after 248 seconds.

 

I'll try to reproduce this problem with SV and find a way around this problem if needed.

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of Simon HB9DRV
Sent: 17 November 2010 18:52
To: sdr-radio-com@...
Subject: RE: [sdr-radio-com] IQ Analysis mode

 

 

Hi,

 

You can't have a wave file bigger than 2GB. If you can play it with SV then there's something odd, probably in my logic. I'll talk with Moe...

 

If needed I'll create a big file myself to see what's what.

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of rfnoise
Sent: 17 November 2010 18:36
To: sdr-radio-com@...
Subject: [sdr-radio-com] IQ Analysis mode

 

 

Hello

I have a 12 hour IQ recording made with SVue that I would like to use with SDR-Radio IQ Analysis feature. But when i load the file into SDR-Radio instead of showing me that it's 720min and 24GB file it says it's 248 seconds and 142MB. What exactly are the limitations of IQ recordings with SDR-Radio ?

This recording was made with SDR-IP using 100KHz Bandwidth for a period of 720 min (60min * 12). This is a single file output not multiple chained files.

I am running SDR-Radio 1.1 build 472.

This what SDR-Radio shows:

Filename Start (UTC) Duration Size Source
----------------------------------------------------------
20101117_043425.wav 11/17/2010 4:34:25 AM 248.361s 142.1 MB SpectraVue 3.0

thanks

Joe
k6sat


Re: IQ Analysis mode

Simon HB9DRV <simon@...>
 

Hi,

 

You can't have a wave file bigger than 2GB. If you can play it with SV then there's something odd, probably in my logic. I'll talk with Moe...

 

If needed I'll create a big file myself to see what's what.

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of rfnoise
Sent: 17 November 2010 18:36
To: sdr-radio-com@...
Subject: [sdr-radio-com] IQ Analysis mode

 

 

Hello

I have a 12 hour IQ recording made with SVue that I would like to use with SDR-Radio IQ Analysis feature. But when i load the file into SDR-Radio instead of showing me that it's 720min and 24GB file it says it's 248 seconds and 142MB. What exactly are the limitations of IQ recordings with SDR-Radio ?

This recording was made with SDR-IP using 100KHz Bandwidth for a period of 720 min (60min * 12). This is a single file output not multiple chained files.

I am running SDR-Radio 1.1 build 472.

This what SDR-Radio shows:

Filename Start (UTC) Duration Size Source
----------------------------------------------------------
20101117_043425.wav 11/17/2010 4:34:25 AM 248.361s 142.1 MB SpectraVue 3.0

thanks

Joe
k6sat


Re: User guide

Simon HB9DRV <simon@...>
 

Hi,

 

I will write the User Manual next week.

 

Simon Brown, HB9DRV, http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of Philip
Sent: 17 November 2010 15:55
To: sdr-radio-com@...
Subject: [sdr-radio-com] User guide

 

 

Hi folks
Is there a user guide/manual for the SDR-Radio software?

Regards
Philip


IQ Analysis mode

rfnoise <rfnoise@...>
 

Hello

I have a 12 hour IQ recording made with SVue that I would like to use with SDR-Radio IQ Analysis feature. But when i load the file into SDR-Radio instead of showing me that it's 720min and 24GB file it says it's 248 seconds and 142MB. What exactly are the limitations of IQ recordings with SDR-Radio ?

This recording was made with SDR-IP using 100KHz Bandwidth for a period of 720 min (60min * 12). This is a single file output not multiple chained files.

I am running SDR-Radio 1.1 build 472.

This what SDR-Radio shows:

Filename Start (UTC) Duration Size Source
--------------------------------------------------------------------------
20101117_043425.wav 11/17/2010 4:34:25 AM 248.361s 142.1 MB SpectraVue 3.0

thanks

Joe
k6sat


Re: More aircraft scatter

Mark &#92;(G4PCS&#92;) <g4pcs@...>
 

oops, Graves radar info at http://www.itr-datanet.com/~pe1itr/graves/

bonk!



From: Mark (G4PCS)
To: sdr-radio-com@...
Sent: Wednesday, 17 November, 2010 16:45:48
Subject: Re: [sdr-radio-com] Re: More aircraft scatter

 

Gordon,

If you've not heard of it already, you might be interested to know several hams have made contacts using the ISS (a rather large satellite!) as a passive reflector. These signals, as received by the participating stations, would have been easy to see on an SDR (with appropriate downconverter). It's probably not possible to use smaller satellites to make actual QSOs, but signals might be detected.

In Europe we also have a rather large radar transmitting on 143.050MHz (Graves, in France), specifically designed for the characterisation of satellite orbits - it's real fun watching that on an SDR from 700km away ;)

citation at http://www.southgatearc.org/news/december2007/bouncing_signals_off_iss.htm
more at http://www3.telus.net/public/va7mm/eme/ (some way down the page)

Graves radar info at http://www3.telus.net/public/va7mm/eme/

73, Mark EI3KD / G4PCS


From: Gordon
To: sdr-radio-com@...
Sent: Wednesday, 17 November, 2010 4:32:17
Subject: [sdr-radio-com] Re: More aircraft scatter

 


Very interesting. "Triangulated" analysis of the curves from several linked receivers should be able to plot the flight path, but could it give altitude ?

Also, if several of these radios were linked over the internet, some fascinating work could be done. Do you think it would be possible to pick up echoes from satellites, if one amateur were to send very powerful short RF pulses ?

Gordon VE3JSJ

--- In sdr-radio-com@..., "RFSPACE" wrote:
>
> Here is another airplane scatter plot using SDR-Radio and the new NetSDR. This is what the busiest air corridor in the world looks like over a period of 5 hours. It looks like there are two transmitters at that frequency. The carrier used is the residual carrier from the HDTV channel at 204-210 MHz. I hope to eventually start plotting the planes on google map once the FM passive radar hardware is completed.
>
> Pieter
>


Re: More aircraft scatter

Augusto
 

Do you remember the ECO satellite?
i2jjr

Il 17/11/2010 17.45, Mark (G4PCS) ha scritto:

 
Gordon,

If you've not heard of it already, you might be interested to know several hams have made contacts using the ISS (a rather large satellite!) as a passive reflector. These signals, as received by the participating stations, would have been easy to see on an SDR (with appropriate downconverter). It's probably not possible to use smaller satellites to make actual QSOs, but signals might be detected.

In Europe we also have a rather large radar transmitting on 143.050MHz (Graves, in France), specifically designed for the characterisation of satellite orbits - it's real fun watching that on an SDR from 700km away ;)

citation at http://www.southgatearc.org/news/december2007/bouncing_signals_off_iss.htm
more at http://www3.telus.net/public/va7mm/eme/ (some way down the page)

Graves radar info at http://www3.telus.net/public/va7mm/eme/

73, Mark EI3KD / G4PCS


From: Gordon
To: sdr-radio-com@...
Sent: Wednesday, 17 November, 2010 4:32:17
Subject: [sdr-radio-com] Re: More aircraft scatter

 


Very interesting. "Triangulated" analysis of the curves from several linked receivers should be able to plot the flight path, but could it give altitude ?

Also, if several of these radios were linked over the internet, some fascinating work could be done. Do you think it would be possible to pick up echoes from satellites, if one amateur were to send very powerful short RF pulses ?

Gordon VE3JSJ

--- In sdr-radio-com@..., "RFSPACE" wrote:
>
> Here is another airplane scatter plot using SDR-Radio and the new NetSDR. This is what the busiest air corridor in the world looks like over a period of 5 hours. It looks like there are two transmitters at that frequency. The carrier used is the residual carrier from the HDTV channel at 204-210 MHz. I hope to eventually start plotting the planes on google map once the FM passive radar hardware is completed.
>
> Pieter
>