Date   

Re: SW2: dynamic range/splatter problem

David Smith
 

Franco

I already have the SPF08 preselector, but obviously I have the HPF switched out whilst listening to MW.

73 David M0OSA

Sent from my iPhone


Re: SW2: dynamic range/splatter problem

neil@...
 

Hi Franco, in my case I have a very tight preselector as I am only receiving signals from my Kuhne transverter.  There is almost nothing out of band, and most of the signals are within 200kHz of my operating frequency. With the NB enabled, the splatter is slightly reduced, but still there.

I'll try some more investigations, but I have no strong signals on the band at present.  There is a major VHF contest this weekend so I will try some experiments to isolate the problem.  A single strong carrier, even from a 5 watt transmitter near to the radio, has only a small effect, it seems to be signals with rapidly-changing levels which cause this effect.

The performance of the DUO with strong signals is extremely good, it is only the SW2 waterfall and audio that are affected.  The DUO S-meter stays normal and the audio is clean and unaffected.  The SW2 audio is unreadable when multiple strong SSB signals are being received.  The noise floor across the whole display on the spectrum graph goes up by 30dB on speech peaks.

I don't think this can be a preselector issue as the DUO works perfectly with totally clean audio and no pumping of the noise floor even 5kHz away from the strong signals.  I am sure I have a wrong setting somewhere in SW2 (as usual!)
Neil G4DBN


Re: SW2: dynamic range/splatter problem

Franco Milan
 

Hi, 

the answer, in this case, is a preselector QSF-06, it have a native hipass filter 1700KHz and then 6 switchable filters.

The 6 Switchable filter can be selected from a list or can be build yourself, this filters are the same used on SPF-08 preselector  and also in DUOr receiver.

QSF-06 have also active TX/RX switch, I’m working to release this in these days.

73, Franco IU3ADL



On 03/set/2015, at 15:13, David Smith dave66smith@... [elad_sdr_en] <elad_sdr_en@...> wrote:

I'll be interested to see if there is an answer to this as I suffer the same effect from local MW stations.

73 David M0OSA

Sent from my iPhone



Re: SW2: dynamic range/splatter problem

the_shamen@...
 

Do you see the "PK" indicator flashing..?? , It's near to signal meter dBm reading

73 - Dave - G8LIY


Re: SW2: dynamic range/splatter problem

David Smith
 

It happens to me with the NB off.

73 David M0OSA

Sent from my iPhone


Re: SW2: dynamic range/splatter problem

neil@...
 

Very good question Lasse.  I cannot remember if NB was enabled, but that might explain it. I'll see if I can get some strong signals to test with to compare NB on or off.
Thanks for the suggestion, I'll test and report results.
Neil G4DBN


Re: SW2: dynamic range/splatter problem

David Smith
 

I'll be interested to see if there is an answer to this as I suffer the same effect from local MW stations.

73 David M0OSA



Sent from my iPhone


Re: SW2: dynamic range/splatter problem

lasse moell
 

Do you have any noise blanker active??

/Lasse SM5GLC

3 september 2015, neil@... [elad_sdr_en] skrev:

 

I have a problem when using SW2 in contests with large signals. Noise floor is around -108dBm, but signals of -70dBm are saturating the receiver and pumping the noise floor in the waterfall by 20-30dB, I see what looks like wideband splatter from any fairly loud signals.  AGC on/off seems to make little difference, as does the threshold.  


Audio taken from the radio itself is perfectly OK, no sign of noise floor pumping or splatter even when really close to the big signals.  Audio from SW2 was totally unusable in the contest as a result, and the splatter was covering up all weak signals.  Typical signal from 60km away appeared to be 150kHz wide on the waterfall. 


I am not seeing any ADC clipping, and these signals are not really loud, maybe peaking S9+20 on USB.  I am using the radio on 14MHz as the IF to a 144MHz transverter.  Using default standalone and single channel 192kHz.


Could I have something set incorrectly in SW2 that is causing this, or is it related to my soundcard performance perhaps?

Neil G4DBN


SW2: dynamic range/splatter problem

neil@...
 

I have a problem when using SW2 in contests with large signals. Noise floor is around -108dBm, but signals of -70dBm are saturating the receiver and pumping the noise floor in the waterfall by 20-30dB, I see what looks like wideband splatter from any fairly loud signals.  AGC on/off seems to make little difference, as does the threshold.  


Audio taken from the radio itself is perfectly OK, no sign of noise floor pumping or splatter even when really close to the big signals.  Audio from SW2 was totally unusable in the contest as a result, and the splatter was covering up all weak signals.  Typical signal from 60km away appeared to be 150kHz wide on the waterfall. 


I am not seeing any ADC clipping, and these signals are not really loud, maybe peaking S9+20 on USB.  I am using the radio on 14MHz as the IF to a 144MHz transverter.  Using default standalone and single channel 192kHz.


Could I have something set incorrectly in SW2 that is causing this, or is it related to my soundcard performance perhaps?

Neil G4DBN


Re: Cropping an FDM-S2 wav file

lasse moell
 

The WAV is simply a "bag" that the user can fill with data, and with the header they can tell others what data it is :)

So, no the data is not the same if the header is different....
http://www.topherlee.com/software/pcm-tut-wavformat.html
https://en.wikipedia.org/wiki/WAV

/Lasse SM5GLC

3 september 2015, 'John Faulkner, Skegness' john.faulkner@... [elad_sdr_en]

 

Very interesting and thank you for the clarification.

So basically these files are the same, but with different header instructions.

I cannot pretend to understand all of this but I am beginning to get my head around a few of these things, in that I can see the basic principals of how they work. The coding aspects are just too complicated for my brain cell and probably always will be, but very interesting nonetheless.

Best regards.

John


On 03/09/2015 03:27, Leif Asbrink leif@... [elad_sdr_en] wrote:
 

Hi John and all,

The Elad RF file is an ordinary .wav file! Wav files contain "chunks"
and the info I have is this:

Perseus metadata is contained in a special chunk just before the
'data' chunk. It is named 'rcvr' and has the following data structure
(longs are 32 bit, time_t is 32 bits)

typedef struct {
char chunkID[4]; // ="rcvr"
long chunkSize; // chunk len - 8
long nCenterFrequencyHz; // center freq in Hz
long nSamplingRateIdx; // 0=125k, 1=250k, 2=500k, 1 M
time_t timeStart; // UTC rec time init
unsigned short wAttenId; // 0=0dB, 1=10dB, 2=20dB, 3=30dB
char bAdcPresel; // 0=Presel Off, 1=Presel On
char bAdcPreamp; // 0=ADC Preamp Off, 1=ADC Preamp ON
char bAdcDither; // 0=ADC Dither Off, 1=ADC Dither ON
char bSpare; // for future use (default = 0)
char rsrvd[16]; // for future use (default = 000..0)
};

Spectravue metadata is contained in a special chunk just before the
'data' chunk. It is named 'auxi' and has the following data structure

struct auxihdr // used by SpectraVue in WAV files
{
char chunkID[4]; // ="auxi" (chunk rfspace)
long chunkSize; // lunghezza del chunk
SYSTEMTIME StartTime;
SYSTEMTIME StopTime;
DWORD CenterFreq; //receiver center frequency
DWORD ADFrequency; //A/D sample frequency before downsampling
DWORD IFFrequency; //IF freq if an external down converter is used
DWORD Bandwidth; //displayable BW if you want to limit the display to less th
DWORD IQOffset; //DC offset of the I and Q channels in 1/1000's of a count
DWORD Unused2;
DWORD Unused3;
DWORD Unused4;
DWORD Unused5;
char nextfilename[96];
};

Linrad understands both of these types of metadata. The Elad files contain an auxi
chunk and one can play Elad files in Linrad. You can edit the file by pressing
"S" where you want to start saving - and then "S" again to stop. Linrad would
record the selected time span in a .raw file (Linrads own format)

You can then use the raw to wav file converter of linrad to get a .wav file
that contains the RF signal between the two presses of "S".

The Linrad package provides sim2spectravue which would add an auxi header to
the .wav file. The frequency would not be correct, but you could run sim2perseus
first and feed in the appropriate center frequency and then run sim2spectravue.

The sim2.... programs (sim2excalibur.c sim2perseus.c sim2powersdr.c sim2qs1r.c
sim2spectravue.c) are simple C programs in the Linrad package. You can
modify them to feed whatever information you want into the proprietary chunks.

I made those programs to be able to test SDR software in a reproducible
way, feeding the same waveform into them all:
http://www.sm5bsz.com/lir/sim1/sim1.htm

73

Leif

"'John Faulkner, Skegness' john.faulkner@... [elad_sdr_en]" wrote:

> On 02/09/2015 17:12, Richard Langley lang@... [elad_sdr_en] wrote:
> >
> > ​Aren't we confusing two types of file here? The Elad RF wav files
> > have a different structure than Elad AF wav files. I believe the AF
> > files are standard audio wav files, which can be played and edited by
> > most audio file applications. The original question was about editing
> > Elad RF wav files, correct?
> >
>
> That's correct.
>
> I don't know why the .wav suffix is used for "IF" recordings (as opposed
> to AF recordings) but the two file types are very different.
>
> John
>
> > -- Richard Langley
> >
> >
> > ----------------------------------------------------------
> > | Richard B. Langley E-mail: lang@... |
> > | Geodetic Research Laboratory Web: http://gge.unb.ca
> > |
> > | Dept. of Geodesy and Geomatics Engineering Phone: +1 506
> > 453-5142 |
> > | University of New Brunswick Fax: +1 506 453-4943 |
> > | Fredericton, N.B., Canada E3B 5A3 |
> > | Fredericton? Where's that? See: http://www.fredericton.ca/
> >
> > |
> > ----------------------------------------------------------
> > ----------------------------------------------------------
> > *From:* elad_sdr_en@... on
> > behalf of 'John Faulkner, Skegness' john.faulkner@...
> > [elad_sdr_en]
> > *Sent:* Wednesday, September 2, 2015 7:39 AM
> > *To:* elad_sdr_en@...
> > *Subject:* Re: [elad_sdr_en] Re: Cropping an FDM-S2 wav file
> >
> >
> > You beat me to it Henry. The wav files created by the SW2 software are
> > not traditional audio files. But if you've found a way to do this in
> > Audacity Dan then please share. Stranger things have been known to
> > happen.
> >
> > Thanks.
> >
> > John
> >
> >
> > On 02/09/2015 11:37, th444de@... [elad_sdr_en] wrote:
> >>
> >> I see a reason because the Elad soft cannot play files cropped with
> >> Audacity.
> >>
> >> Neither RF nor AF.
> >> What export format do you choose in Audacity?
> >> How did you manage that Audacity maintains L.O. frequency,
> >> demodulation frequency, demodulation mode, filter bandwidth a. s. o.?
> >> 73, Henry
> >>
> >> ---In elad_sdr_en@..., wrote :
> >>
> >> Audacity is my first choice when it comes to manipulating audio files.
> >>
> >> I cannot see a reason why it could not crop an SW2 wav.
> >>
> >>
> >
> >
> >
> >
>



Re: Cropping an FDM-S2 wav file

John Faulkner, Skegness <john.faulkner@...>
 

Very interesting and thank you for the clarification.

So basically these files are the same, but with different header instructions.

I cannot pretend to understand all of this but I am beginning to get my head around a few of these things, in that I can see the basic principals of how they work. The coding aspects are just too complicated for my brain cell and probably always will be, but very interesting nonetheless.

Best regards.

John


On 03/09/2015 03:27, Leif Asbrink leif@... [elad_sdr_en] wrote:
 

Hi John and all,

The Elad RF file is an ordinary .wav file! Wav files contain "chunks"
and the info I have is this:

Perseus metadata is contained in a special chunk just before the
'data' chunk. It is named 'rcvr' and has the following data structure
(longs are 32 bit, time_t is 32 bits)

typedef struct {
char chunkID[4]; // ="rcvr"
long chunkSize; // chunk len - 8
long nCenterFrequencyHz; // center freq in Hz
long nSamplingRateIdx; // 0=125k, 1=250k, 2=500k, 1 M
time_t timeStart; // UTC rec time init
unsigned short wAttenId; // 0=0dB, 1=10dB, 2=20dB, 3=30dB
char bAdcPresel; // 0=Presel Off, 1=Presel On
char bAdcPreamp; // 0=ADC Preamp Off, 1=ADC Preamp ON
char bAdcDither; // 0=ADC Dither Off, 1=ADC Dither ON
char bSpare; // for future use (default = 0)
char rsrvd[16]; // for future use (default = 000..0)
};

Spectravue metadata is contained in a special chunk just before the
'data' chunk. It is named 'auxi' and has the following data structure

struct auxihdr // used by SpectraVue in WAV files
{
char chunkID[4]; // ="auxi" (chunk rfspace)
long chunkSize; // lunghezza del chunk
SYSTEMTIME StartTime;
SYSTEMTIME StopTime;
DWORD CenterFreq; //receiver center frequency
DWORD ADFrequency; //A/D sample frequency before downsampling
DWORD IFFrequency; //IF freq if an external down converter is used
DWORD Bandwidth; //displayable BW if you want to limit the display to less th
DWORD IQOffset; //DC offset of the I and Q channels in 1/1000's of a count
DWORD Unused2;
DWORD Unused3;
DWORD Unused4;
DWORD Unused5;
char nextfilename[96];
};

Linrad understands both of these types of metadata. The Elad files contain an auxi
chunk and one can play Elad files in Linrad. You can edit the file by pressing
"S" where you want to start saving - and then "S" again to stop. Linrad would
record the selected time span in a .raw file (Linrads own format)

You can then use the raw to wav file converter of linrad to get a .wav file
that contains the RF signal between the two presses of "S".

The Linrad package provides sim2spectravue which would add an auxi header to
the .wav file. The frequency would not be correct, but you could run sim2perseus
first and feed in the appropriate center frequency and then run sim2spectravue.

The sim2.... programs (sim2excalibur.c sim2perseus.c sim2powersdr.c sim2qs1r.c
sim2spectravue.c) are simple C programs in the Linrad package. You can
modify them to feed whatever information you want into the proprietary chunks.

I made those programs to be able to test SDR software in a reproducible
way, feeding the same waveform into them all:
http://www.sm5bsz.com/lir/sim1/sim1.htm

73

Leif

"'John Faulkner, Skegness' john.faulkner@... [elad_sdr_en]" wrote:

> On 02/09/2015 17:12, Richard Langley lang@... [elad_sdr_en] wrote:
> >
> > ​Aren't we confusing two types of file here? The Elad RF wav files
> > have a different structure than Elad AF wav files. I believe the AF
> > files are standard audio wav files, which can be played and edited by
> > most audio file applications. The original question was about editing
> > Elad RF wav files, correct?
> >
>
> That's correct.
>
> I don't know why the .wav suffix is used for "IF" recordings (as opposed
> to AF recordings) but the two file types are very different.
>
> John
>
> > -- Richard Langley
> >
> >
> > ----------------------------------------------------------
> > | Richard B. Langley E-mail: lang@... |
> > | Geodetic Research Laboratory Web: http://gge.unb.ca
> > |
> > | Dept. of Geodesy and Geomatics Engineering Phone: +1 506
> > 453-5142 |
> > | University of New Brunswick Fax: +1 506 453-4943 |
> > | Fredericton, N.B., Canada E3B 5A3 |
> > | Fredericton? Where's that? See: http://www.fredericton.ca/
> >
> > |
> > ----------------------------------------------------------
> > ----------------------------------------------------------
> > *From:* elad_sdr_en@... on
> > behalf of 'John Faulkner, Skegness' john.faulkner@...
> > [elad_sdr_en]
> > *Sent:* Wednesday, September 2, 2015 7:39 AM
> > *To:* elad_sdr_en@...
> > *Subject:* Re: [elad_sdr_en] Re: Cropping an FDM-S2 wav file
> >
> >
> > You beat me to it Henry. The wav files created by the SW2 software are
> > not traditional audio files. But if you've found a way to do this in
> > Audacity Dan then please share. Stranger things have been known to
> > happen.
> >
> > Thanks.
> >
> > John
> >
> >
> > On 02/09/2015 11:37, th444de@... [elad_sdr_en] wrote:
> >>
> >> I see a reason because the Elad soft cannot play files cropped with
> >> Audacity.
> >>
> >> Neither RF nor AF.
> >> What export format do you choose in Audacity?
> >> How did you manage that Audacity maintains L.O. frequency,
> >> demodulation frequency, demodulation mode, filter bandwidth a. s. o.?
> >> 73, Henry
> >>
> >> ---In elad_sdr_en@..., wrote :
> >>
> >> Audacity is my first choice when it comes to manipulating audio files.
> >>
> >> I cannot see a reason why it could not crop an SW2 wav.
> >>
> >>
> >
> >
> >
> >
>



Re: Cropping an FDM-S2 wav file

Leif Asbrink <leif@...>
 

Hi John and all,

The Elad RF file is an ordinary .wav file! Wav files contain "chunks"
and the info I have is this:

Perseus metadata is contained in a special chunk just before the
'data' chunk. It is named 'rcvr' and has the following data structure
(longs are 32 bit, time_t is 32 bits)

typedef struct {
char chunkID[4]; // ="rcvr"
long chunkSize; // chunk len - 8
long nCenterFrequencyHz; // center freq in Hz
long nSamplingRateIdx; // 0=125k, 1=250k, 2=500k, 1 M
time_t timeStart; // UTC rec time init
unsigned short wAttenId; // 0=0dB, 1=10dB, 2=20dB, 3=30dB
char bAdcPresel; // 0=Presel Off, 1=Presel On
char bAdcPreamp; // 0=ADC Preamp Off, 1=ADC Preamp ON
char bAdcDither; // 0=ADC Dither Off, 1=ADC Dither ON
char bSpare; // for future use (default = 0)
char rsrvd[16]; // for future use (default = 000..0)
};

Spectravue metadata is contained in a special chunk just before the
'data' chunk. It is named 'auxi' and has the following data structure

struct auxihdr // used by SpectraVue in WAV files
{
char chunkID[4]; // ="auxi" (chunk rfspace)
long chunkSize; // lunghezza del chunk
SYSTEMTIME StartTime;
SYSTEMTIME StopTime;
DWORD CenterFreq; //receiver center frequency
DWORD ADFrequency; //A/D sample frequency before downsampling
DWORD IFFrequency; //IF freq if an external down converter is used
DWORD Bandwidth; //displayable BW if you want to limit the display to less th
DWORD IQOffset; //DC offset of the I and Q channels in 1/1000's of a count
DWORD Unused2;
DWORD Unused3;
DWORD Unused4;
DWORD Unused5;
char nextfilename[96];
};

Linrad understands both of these types of metadata. The Elad files contain an auxi
chunk and one can play Elad files in Linrad. You can edit the file by pressing
"S" where you want to start saving - and then "S" again to stop. Linrad would
record the selected time span in a .raw file (Linrads own format)

You can then use the raw to wav file converter of linrad to get a .wav file
that contains the RF signal between the two presses of "S".

The Linrad package provides sim2spectravue which would add an auxi header to
the .wav file. The frequency would not be correct, but you could run sim2perseus
first and feed in the appropriate center frequency and then run sim2spectravue.

The sim2.... programs (sim2excalibur.c sim2perseus.c sim2powersdr.c sim2qs1r.c
sim2spectravue.c) are simple C programs in the Linrad package. You can
modify them to feed whatever information you want into the proprietary chunks.

I made those programs to be able to test SDR software in a reproducible
way, feeding the same waveform into them all:
http://www.sm5bsz.com/lir/sim1/sim1.htm


73

Leif







"'John Faulkner, Skegness' john.faulkner@g1vvp.co.uk [elad_sdr_en]" <elad_sdr_en@yahoogroups.com> wrote:

On 02/09/2015 17:12, Richard Langley lang@unb.ca [elad_sdr_en] wrote:

​Aren't we confusing two types of file here? The Elad RF wav files
have a different structure than Elad AF wav files. I believe the AF
files are standard audio wav files, which can be played and edited by
most audio file applications. The original question was about editing
Elad RF wav files, correct?
That's correct.

I don't know why the .wav suffix is used for "IF" recordings (as opposed
to AF recordings) but the two file types are very different.

John

-- Richard Langley


-----------------------------------------------------------------------------
| Richard B. Langley E-mail: lang@unb.ca |
| Geodetic Research Laboratory Web: http://gge.unb.ca
<http://gge.unb.ca/> |
| Dept. of Geodesy and Geomatics Engineering Phone: +1 506
453-5142 |
| University of New Brunswick Fax: +1 506 453-4943 |
| Fredericton, N.B., Canada E3B 5A3 |
| Fredericton? Where's that? See: http://www.fredericton.ca/
<https://unbmail.unb.ca/owa/redir.aspx?C=tVxi5OaRXE2jUmSNTu0wE7USusV6L9AIh-TKOqhq1DE--EjKeq-SUal8Myg-FGJn53Gm890SFIc.&URL=http%3a%2f%2fwww.fredericton.ca%2f>
|
-----------------------------------------------------------------------------
------------------------------------------------------------------------
*From:* elad_sdr_en@yahoogroups.com <elad_sdr_en@yahoogroups.com> on
behalf of 'John Faulkner, Skegness' john.faulkner@g1vvp.co.uk
[elad_sdr_en] <elad_sdr_en@yahoogroups.com>
*Sent:* Wednesday, September 2, 2015 7:39 AM
*To:* elad_sdr_en@yahoogroups.com
*Subject:* Re: [elad_sdr_en] Re: Cropping an FDM-S2 wav file


You beat me to it Henry. The wav files created by the SW2 software are
not traditional audio files. But if you've found a way to do this in
Audacity Dan then please share. Stranger things have been known to
happen.

Thanks.

John


On 02/09/2015 11:37, th444de@yahoo.de [elad_sdr_en] wrote:

I see a reason because the Elad soft cannot play files cropped with
Audacity.

Neither RF nor AF.
What export format do you choose in Audacity?
How did you manage that Audacity maintains L.O. frequency,
demodulation frequency, demodulation mode, filter bandwidth a. s. o.?
73, Henry

---In elad_sdr_en@yahoogroups.com, <danbbower@...> wrote :

Audacity is my first choice when it comes to manipulating audio files.

I cannot see a reason why it could not crop an SW2 wav.




Re: Cropping an FDM-S2 wav file

John Faulkner, Skegness <john.faulkner@...>
 

On 02/09/2015 17:12, Richard Langley lang@... [elad_sdr_en] wrote:
 

​Aren't we confusing two types of file here? The Elad RF wav files have a different structure than Elad AF wav files. I believe the AF files are standard audio wav files, which can be played and edited by most audio file applications. The original question was about editing Elad RF wav files, correct?


That's correct.

I don't know why the .wav suffix is used for "IF" recordings (as opposed to AF recordings) but the two file types are very different.

John

-- Richard Langley


-----------------------------------------------------------------------------
| Richard B. Langley                            E-mail: lang@...         |
| Geodetic Research Laboratory                  Web: http://gge.unb.ca      |
| Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506 453-5142   |
| University of New Brunswick                   Fax:      +1 506 453-4943   |
| Fredericton, N.B., Canada  E3B 5A3                                        |
|        Fredericton?  Where's that?  See: http://www.fredericton.ca/       |
-----------------------------------------------------------------------------

From: elad_sdr_en@... on behalf of 'John Faulkner, Skegness' john.faulkner@... [elad_sdr_en]
Sent: Wednesday, September 2, 2015 7:39 AM
To: elad_sdr_en@...
Subject: Re: [elad_sdr_en] Re: Cropping an FDM-S2 wav file
 


You beat me to it Henry. The wav files created by the SW2 software are not traditional audio files. But if you've found a way to do this in Audacity Dan then please share. Stranger things have been known to happen.

Thanks.

John


On 02/09/2015 11:37, th444de@... [elad_sdr_en] wrote:
 

I see a reason because the Elad soft cannot play files cropped with Audacity.

Neither RF nor AF.
What export format do you choose in Audacity?
How did you manage that Audacity maintains L.O. frequency, demodulation frequency, demodulation mode, filter bandwidth a. s. o.?
73, Henry

---In elad_sdr_en@..., wrote :

Audacity is my first choice when it comes to manipulating audio files.

I cannot see a reason why it could not crop an SW2 wav.


 





Re: Cropping an FDM-S2 wav file

Barry Williams <ba.williams@...>
 

Hi Richard,

It is MySDRPlayback at the link that Satnipper sent.

For example, you are looking for a SSTV file that was sent on 6.925. You use your draw tool to draw a box around that area on the sonagram picture. You will see the frequency ranges in windows for upper and lower limits. You can change these numerically once you have drawn your boundaries. You can narrow your bandwidth, for example. You can select modes such as AM or USB. You can play it and further adjust and fine tune your selection. It has a clever set of buttons for reversing 5 seconds, 15 seconds, etc. Once you are happy with the selection parameters you can then save our your choice as a WAVE file. The docs say the author then uses his saved WAV file to extract SSTV images with another program- Multimode.

I'll test the demodulated output later to see if an SDR program will load and play it, or if it is an audio file.


Barry



On 9/2/15 11:16 AM, Richard Langley lang@... [elad_sdr_en] wrote:
 

​What is the name of the Black Cat software for the Mac that can edit an Elad RF wav file? Or were you talking about Elad AF wav files?

-- Richard Langley


-----------------------------------------------------------------------------
| Richard B. Langley                            E-mail: lang@...         |
| Geodetic Research Laboratory                  Web: http://gge.unb.ca      |
| Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506 453-5142   |
| University of New Brunswick                   Fax:      +1 506 453-4943   |
| Fredericton, N.B., Canada  E3B 5A3                                        |
|        Fredericton?  Where's that?  See: http://www.fredericton.ca/       |
-----------------------------------------------------------------------------

From: elad_sdr_en@... on behalf of Barry Williams ba.williams@... [elad_sdr_en]
Sent: Tuesday, September 1, 2015 2:46 PM
To: elad_sdr_en@...
Subject: Re: [elad_sdr_en] Cropping an FDM-S2 wav file
 


John,

There is a freeware file to do this but it is for the MacOS. It only recognizes the first 2 gHz of data. The program has that limitation, I believe. It can extract any frequency, bandwidth, length & mode from a 'living sonagram' type of waterfall pic. It saves to audio wav files. Write me offlist if you want me to try and do it for you.


Barry


On 9/1/15 11:55 AM, 'John Faulkner, Skegness' john.faulkner@... [elad_sdr_en] wrote:
 

Somebody told me that it is possible to crop a wav file to make it
physically smaller, but I cannot see a way to do this.

I have a recording of a meteor burst which is only three seconds in
length. If I can crop this down I would be able to shrink a 2GB to a
tiny fraction of this, which would be enormously helpful when it comes
to uploading and downloading such a file.

Thanks if anybody can help.

Regards.

John






Re: Cropping an FDM-S2 wav file

Stuart Heathcock
 

From: elad_sdr_en@... [mailto:elad_sdr_en@...]
Sent: 02 September 2015 17:16
To: elad_sdr_en@...
Subject: Re: [elad_sdr_en] Cropping an FDM-S2 wav file

 

 

​What is the name of the Black Cat software for the Mac that can edit an Elad RF wav file? Or were you talking about Elad AF wav files?

-- Richard Langley

 

-----------------------------------------------------------------------------

| Richard B. Langley                            E-mail: lang@...         |
| Geodetic Research Laboratory                  Web: http://gge.unb.ca      |

| Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506 453-5142   |
| University of New Brunswick                   Fax:      +1 506 453-4943   |
| Fredericton, N.B., Canada  E3B 5A3                                        |
|        Fredericton?  Where's that?  See: http://www.fredericton.ca/       |
-----------------------------------------------------------------------------


From: elad_sdr_en@... <elad_sdr_en@...> on behalf of Barry Williams ba.williams@... [elad_sdr_en] <elad_sdr_en@...>
Sent: Tuesday, September 1, 2015 2:46 PM
To: elad_sdr_en@...
Subject: Re: [elad_sdr_en] Cropping an FDM-S2 wav file

 



John,

There is a freeware file to do this but it is for the MacOS. It only recognizes the first 2 gHz of data. The program has that limitation, I believe. It can extract any frequency, bandwidth, length & mode from a 'living sonagram' type of waterfall pic. It saves to audio wav files. Write me offlist if you want me to try and do it for you.


Barry

On 9/1/15 11:55 AM, 'John Faulkner, Skegness' john.faulkner@... [elad_sdr_en] wrote:

 

Somebody told me that it is possible to crop a wav file to make it
physically smaller, but I cannot see a way to do this.

I have a recording of a meteor burst which is only three seconds in
length. If I can crop this down I would be able to shrink a 2GB to a
tiny fraction of this, which would be enormously helpful when it comes
to uploading and downloading such a file.

Thanks if anybody can help.

Regards.

John




Re: Cropping an FDM-S2 wav file

Richard Langley
 

​What is the name of the Black Cat software for the Mac that can edit an Elad RF wav file? Or were you talking about Elad AF wav files?

-- Richard Langley


-----------------------------------------------------------------------------
| Richard B. Langley                            E-mail: lang@...         |
| Geodetic Research Laboratory                  Web: http://gge.unb.ca      |
| Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506 453-5142   |
| University of New Brunswick                   Fax:      +1 506 453-4943   |
| Fredericton, N.B., Canada  E3B 5A3                                        |
|        Fredericton?  Where's that?  See: http://www.fredericton.ca/       |
-----------------------------------------------------------------------------


From: elad_sdr_en@... on behalf of Barry Williams ba.williams@... [elad_sdr_en]
Sent: Tuesday, September 1, 2015 2:46 PM
To: elad_sdr_en@...
Subject: Re: [elad_sdr_en] Cropping an FDM-S2 wav file
 


John,

There is a freeware file to do this but it is for the MacOS. It only recognizes the first 2 gHz of data. The program has that limitation, I believe. It can extract any frequency, bandwidth, length & mode from a 'living sonagram' type of waterfall pic. It saves to audio wav files. Write me offlist if you want me to try and do it for you.


Barry


On 9/1/15 11:55 AM, 'John Faulkner, Skegness' john.faulkner@... [elad_sdr_en] wrote:
 

Somebody told me that it is possible to crop a wav file to make it
physically smaller, but I cannot see a way to do this.

I have a recording of a meteor burst which is only three seconds in
length. If I can crop this down I would be able to shrink a 2GB to a
tiny fraction of this, which would be enormously helpful when it comes
to uploading and downloading such a file.

Thanks if anybody can help.

Regards.

John





Re: Cropping an FDM-S2 wav file

Richard Langley
 

​Aren't we confusing two types of file here? The Elad RF wav files have a different structure than Elad AF wav files. I believe the AF files are standard audio wav files, which can be played and edited by most audio file applications. The original question was about editing Elad RF wav files, correct?

-- Richard Langley


-----------------------------------------------------------------------------
| Richard B. Langley                            E-mail: lang@...         |
| Geodetic Research Laboratory                  Web: http://gge.unb.ca      |
| Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506 453-5142   |
| University of New Brunswick                   Fax:      +1 506 453-4943   |
| Fredericton, N.B., Canada  E3B 5A3                                        |
|        Fredericton?  Where's that?  See: http://www.fredericton.ca/       |
-----------------------------------------------------------------------------


From: elad_sdr_en@... on behalf of 'John Faulkner, Skegness' john.faulkner@... [elad_sdr_en]
Sent: Wednesday, September 2, 2015 7:39 AM
To: elad_sdr_en@...
Subject: Re: [elad_sdr_en] Re: Cropping an FDM-S2 wav file
 


You beat me to it Henry. The wav files created by the SW2 software are not traditional audio files. But if you've found a way to do this in Audacity Dan then please share. Stranger things have been known to happen.

Thanks.

John


On 02/09/2015 11:37, th444de@... [elad_sdr_en] wrote:
 

I see a reason because the Elad soft cannot play files cropped with Audacity.

Neither RF nor AF.
What export format do you choose in Audacity?
How did you manage that Audacity maintains L.O. frequency, demodulation frequency, demodulation mode, filter bandwidth a. s. o.?
73, Henry

---In elad_sdr_en@..., wrote :

Audacity is my first choice when it comes to manipulating audio files.

I cannot see a reason why it could not crop an SW2 wav.


 




Just Joined

Terry Higginson
 

Hi All

Just joined the group as I am thinking of getting going with SDR, and thought the Elads might be a good place to start, so just listening for general observations really.

Terry

M1GXL


Re: Cropping an FDM-S2 wav file

Kari Tuominen
 

SDRWav Lite in SW1 pack? 


Seeking help with my S Meter

john.cheeseman@...
 

Hi everyone,  I am running a Elad S2 and am very happy with it except for one problem.  When ever I change the displayed bandwidth to 768 Khz or 384 Khz or 192 Khz the S meter does not work.  If I then switch back to 1536 Khz it starts working again.
Does anyone have any idea what is wrong.  Is it something that I am doing incorrectly or some setting I have to adjust?
Any advice would be appreciated.

Thanks and regards John


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