Date   

Re: Console background noise, all versions

Simon HB9DRV <simon@...>
 

I'm off to bed now - will look at these problems.

 

Simon Brown, HB9DRV

http://sdr-radio.com

 

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

I just had a somewhat related phenomenon...

 


Digital Decoder - Preview

Simon HB9DRV <simon@...>
 

Hi All,

 

http://tinyurl.com/3xxg2j2 the first text being decoded. I think my SSB demodulator is mangling the audio somewhat but...

 

This is the Digital Master 780 (DM780) DLL doing the business.

 

 

Simon Brown, HB9DRV

http://sdr-radio.com

 


Re: Console background noise, all versions

Bruce Tanner
 

I just had a somewhat related phenomenon...

I live very close to a local NPR transmitter and was demonstrating the 'SDR Radio' remote with him from his location. He reported hearing this station across the band in various locations. When I checked it locally I found the same thing.

I use a Softrock RX Ensemble as the RX. When I turn off the power to it as well as turn off the port that it feeds into my FA-66 USB external sound interface I can turn up the master volume and hear the local station well... This I would say is the Softrock acting as a crystal set and it apparently heterodynes with the LO when there is a strong signal being received. I hear it even under WWV 10 MHz.

Well to carry the experiment a bit farther.. I turned the SR back on and used PSDR to listen to the same signals. They come out pretty clear. I can hear a bit of hash in the noise level but no S-3-4 level interference that I get with SDR Radio.

What might be responsible for the difference in the operation of the software versions and what might we ask Simon to about it short of my moving away from strong signals?

Bruce, K2BET

On 8/2/2010 2:35 PM, Jim Miles wrote:

 
Hi Phil

   I had suggested Pass Band Tuning to address
basically the same thing. I do this with my Icom R-75
And really seems to work well. I use NR-3 on SSB signals
Now, but unless the signal is strong enough there is
A squeal ( same as increasing the r-75 DSP to high). I know
NR-3 is overkill for cw..but maybe Simon could look at the common
Factor between the two. Since I'm not a programer not sure
What is possible.

Jim swl/utility dx'er

Jim's iPhone 3GS 


On Aug 2, 2010, at 12:53 PM, "ic8pof" <ic8pof@yahoo.com> wrote:

 

HI Simon and All.
The background noise in long SWL_ing sessions is very "stressy".
Could be possible to add a sort of Noise_Reducer if no signal is present in the passband ?
I do much CW listening and the more narrow the filter is the more HISS
comes from the speakers.
I have already tried to keep NR-1 ON at minimum, but the reduction on the background HISS is not much effective.
73
Phil



__________ Information from ESET Smart Security, version of virus signature database 5335 (20100802) __________

The message was checked by ESET Smart Security.

http://www.eset.com


Re: Console background noise, all versions

Jim Miles <jmiles56@...>
 

Hi Phil

   I had suggested Pass Band Tuning to address
basically the same thing. I do this with my Icom R-75
And really seems to work well. I use NR-3 on SSB signals
Now, but unless the signal is strong enough there is
A squeal ( same as increasing the r-75 DSP to high). I know
NR-3 is overkill for cw..but maybe Simon could look at the common
Factor between the two. Since I'm not a programer not sure
What is possible.

Jim swl/utility dx'er

Jim's iPhone 3GS 


On Aug 2, 2010, at 12:53 PM, "ic8pof" <ic8pof@...> wrote:

 

HI Simon and All.
The background noise in long SWL_ing sessions is very "stressy".
Could be possible to add a sort of Noise_Reducer if no signal is present in the passband ?
I do much CW listening and the more narrow the filter is the more HISS
comes from the speakers.
I have already tried to keep NR-1 ON at minimum, but the reduction on the background HISS is not much effective.
73
Phil


Console background noise, all versions

ic8pof
 

HI Simon and All.
The background noise in long SWL_ing sessions is very "stressy".
Could be possible to add a sort of Noise_Reducer if no signal is present in the passband ?
I do much CW listening and the more narrow the filter is the more HISS
comes from the speakers.
I have already tried to keep NR-1 ON at minimum, but the reduction on the background HISS is not much effective.
73
Phil


Re: Tracking a Satellite APT signal in the ECSS mode in SDR.

jorschei <kthkit@...>
 

Hi Simon,

Yes I now you are very busy, we must have patient, and you need your time.
It is great if you see the possibility programming this feature's
You do a great job.

73' Joris PE1KTH.

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

Hi,



This is something I can look at later, at the moment I need 48 hours in each
day. Adding Doppler shift in the SDR-RADIO.com console would be very easy as
I have the logic in another DLL. Adding Doppler would remove any need for
ECSS and the FM demodulation should be perfect as long as:



1) You enter your location correctly, and

2) The satellite's Kepler data is up to date.



As soon as I have my Satellite-capable SDR receiver I can try this. It would
only take a few days to add the Doppler support.



As for demodulation of the pictures - this would also be interesting.



Simon Brown, HB9DRV

http://sdr-radio.com



From: sdr-radio-com@... [mailto:sdr-radio-com@...]
On Behalf Of jorschei
Sent: 02 August 2010 14:58
To: sdr-radio-com@...
Subject: [sdr-radio-com] Tracking a Satellite APT signal in the ECSS mode in
SDR.





Hi Simon,

I don't want fire up competition bud exchange ideas of possible features in
SDR software.
I did an ECSS experiment with WINRADHD, tracking a Satellite APT data within
the filter pass band.
An option for future releases? See in the files for report.

73' Joris PE1KTH


Re: Next Demo Kit

Jim Miles <jmiles56@...>
 

Simon

  I don't blame you for getting out and away from it..:-)
It's been around 106f degrees here so I ain't leaving the
Air conditioning unless I have to. I'll patiently wait for the new goodie
To come down the pipe. 

Jim swl/util dx'er

Jim's iPhone 3GS 


On Aug 2, 2010, at 2:04 AM, "Simon HB9DRV" <simon@...> wrote:

 

Hi,

 

Did something different over the weekend - can't write code seven days a week, especially when the weather is so good.

 

Anyway I'll release a kit when the current 'new surprise' is working, or at least can be used to some extent. I'll not give anything away at the moment but no other SDR program has this feature - or should I say 'these features'?

 

Simon Brown, HB9DRV

http://sdr-radio.com

 

From: sdr-radio-com@yahoogroups.com [mailto:sdr-radio-com@yahoogroups.com] On Behalf Of jmiles56@sbcglobal.net

well sunday has come and almost gone here...but then you didn't say any particulair one..so maybe next sunday..;-) Whenever it make it out I'm sure it will be good.

 


Re: Tracking a Satellite APT signal in the ECSS mode in SDR.

Simon HB9DRV <simon@...>
 

Hi,

 

This is something I can look at later, at the moment I need 48 hours in each day. Adding Doppler shift in the SDR-RADIO.com console would be very easy as I have the logic in another DLL. Adding Doppler would remove any need for ECSS and the FM demodulation should be perfect as long as:

 

1) You enter your location correctly, and

2) The satellite's Kepler data is up to date.

 

As soon as I have my Satellite-capable SDR receiver I can try this. It would only take a few days to add the Doppler support.

 

As for demodulation of the pictures - this would also be interesting.

 

Simon Brown, HB9DRV

http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of jorschei
Sent: 02 August 2010 14:58
To: sdr-radio-com@...
Subject: [sdr-radio-com] Tracking a Satellite APT signal in the ECSS mode in SDR.

 

 

Hi Simon,

I don't want fire up competition bud exchange ideas of possible features in SDR software.
I did an ECSS experiment with WINRADHD, tracking a Satellite APT data within the filter pass band.
An option for future releases? See in the files for report.

73' Joris PE1KTH


Tracking a Satellite APT signal in the ECSS mode in SDR.

jorschei <kthkit@...>
 

Hi Simon,

I don't want fire up competition bud exchange ideas of possible features in SDR software.
I did an ECSS experiment with WINRADHD, tracking a Satellite APT data within the filter pass band.
An option for future releases? See in the files for report.

73' Joris PE1KTH


Re: Almost One Year

Simon HB9DRV <simon@...>
 

The Digital Decoder will be implemented in a dockable pane, so this can be dragged (floated) over to a second monitor.

 

One thing that dawned on me is that with SDR we can put staggering filters on a digital signal - for example with PSK31 a 50Hz filter with very sharp skirts down to -100dB is no problem at all, this filter comes right after the mixer.

 

Using the advanced vector programming libraries from Intel I can do something rather special with some modes such as RTTY which otherwise would chew up too much CPU.

 

Simon Brown, HB9DRV

http://sdr-radio.com

 

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

I cant see the point of an additional waterfall when we have a great zoom window!

 


Re: Next Demo Kit

Simon HB9DRV <simon@...>
 

This feature has been tested daily for the last 30-odd years of my programming life :)

 

Simon Brown, HB9DRV

http://sdr-radio.com

 

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

 

Oh great!  A radio that gets a beer out of the fridge and pours it for you..............  Simon, you truly are a star.

 


Re: Next Demo Kit

nottager
 

On 02/08/2010 07:04, Simon HB9DRV wrote:

Oh great!  A radio that gets a beer out of the fridge and pours it for you..............  Simon, you truly are a star.

Bob
M0PMP


Re: Next Demo Kit

Simon HB9DRV <simon@...>
 

Hi,

 

Did something different over the weekend - can't write code seven days a week, especially when the weather is so good.

 

Anyway I'll release a kit when the current 'new surprise' is working, or at least can be used to some extent. I'll not give anything away at the moment but no other SDR program has this feature - or should I say 'these features'?

 

Simon Brown, HB9DRV

http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of jmiles56@...

well sunday has come and almost gone here...but then you didn't say any particulair one..so maybe next sunday..;-) Whenever it make it out I'm sure it will be good.

 


Re: Almost One Year

Jim Rossell <k3qyr@...>
 

You know Simon I taught programming for 30 yrs and now retired I still do not sleep. Amazing how I still modify and change code... The XYL still tolerates me.

your code is great !!

Jim, K3QYR



From: Simon HB9DRV
To: sdr-radio-com@...
Sent: Sat, July 31, 2010 3:58:01 AM
Subject: RE: [sdr-radio-com] Almost One Year

 

Real programmers never sleep.

 

Simon Brown, HB9DRV

http://sdr-radio. com

 

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

 

 

Holidays and vacations are not allowed. Back to work!

 



Re: Next Demo Kit

jmiles56@sbcglobal.net <jmiles56@...>
 

well sunday has come and almost gone here...but then you didn't say any particulair one..so maybe next sunday..;-) Whenever it make it out I'm sure it will be good.

Jim Miles SWL/UTIL dx'er

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

I'll try to get a kit out on Sunday with the new features I've been working
on.



Simon Brown, HB9DRV

http://sdr-radio.com


Re: Almost One Year

terry_genes <tgenes@...>
 

I cant see the point of an additional waterfall when we have a great zoom window!
Terry

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

I plan to put the DM780 decoder in the console as a small docking window
with its own waterfall. I'll also integrate DM780 via (probably) TCP/IP, but
I also see that a small digital mode decoder would be very handy.



The DM780 encoder / decoder is written in its own DLL so integration is very
easy.



Simon Brown, HB9DRV

http://sdr-radio.com



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

when CW (and rtty) is also in the console that would be great, I think at
the end it will be 'all in one' sdr software hi!


Re: Maximum variable filter bandwidth

Leif Asbrink
 

Hi Alex,

I followed your instructions and Linrad 3.13 is now
installed and I can call it up using the desktop shortcut.
Fine:-)

I've got the SDR-IQ as the input device and the Realtek
set as the output device to the speakers. I'm sure it's
something simple, but I'm unable to hear anything coming
from the speakers.
Do you see a main spectrum and the associated waterfall?

When you click a signal in the main spectrum/waterfall you
should see a green line on that frequency and you should
see a baseband spectrum and its associated waterfall.

Also, don't quite know how to correlate the upper
frequency display to the received frequency of the IQ.
This thing is a compromise. Only the decimals are shown in the
main spectrum. The full frequency readout is in the baseband
graph while the center frequency for the SDR-IQ (or whatever
hardware) is in the frequency control box.

Using a new Windows 7 32 bit Toshiba laptop for this.
As far as I know the OS version does not matter and any
hardware of the Pentium 3 level or above should be fully
adequate.


Also have a legal VAC download available on the PC.
I have no experience with VAC, but I would expect it to
behave as any normal Windows sound device.

Can you direct me to your instructions on how to get
this up and running?
I have no idea why it is not up and running already.
Surely there are many ways to set parameters that
would result in zero output, but I would think default
parameters should give a working starting point.

For the SDR-IQ: ol rcf is an attenuator. A large
value will make signals weak.

The red bar at the left hand side of the baseband graph
is the volume control. If too low you would hear nothing.

I have already written far too much text. If you would read
all of it you would most probably know what to do, but I
do not expect newcomers to have the interest to do that
so I am interested in your feedback on what you have now.
It is unexpected that you do not have a working receiver
and presumably I should change something.

73

Leif / SM5BSZ


Re: SDR-RADIO request...

Simon HB9DRV <simon@...>
 

Hi,

 

Are you running remotely?

For local look at the Waterfall options.

 

Simon Brown, HB9DRV

http://sdr-radio.com

 

From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of baj4242
Sent: 31 July 2010 20:39
To: sdr-radio-com@...
Subject: [sdr-radio-com] Re: SDR-RADIO request...

 

 



Hi Pieter,

Are you seeing 200 updates a second in the SDR-Radio Console or SpectraVue? The reason I ask is that I am only seeing an ~3 update/second rate for both the main panadaptor and the AF Spectrum windows in the console.

I'm not asking for anything like 200/second -- only something like 10 or 15.

I've looked for the option to change the rate, but I haven't found it yet.

Barry

--- In sdr-radio-com@..., RFSPACE wrote:
>
> Simon,
>
> They already update at greater than 200/sec on my machine. The display is already starting to break up around the waterfall tuning bar.
>
> Pieter
>
> Sent from my iPhone 4
>
> On Jul 27, 2010, at 2:15 PM, "Simon HB9DRV" >
> > Hi,
> >
> >
> >
> > Yes, I could make these faster but this will cost more CPU. Personally I don't like these displays updating quickly as I find it very tiring on the eyes.
> >
> >
> >
> > how much faster would you like these displays to update?
> >
> >
> >
> > Simon Brown, HB9DRV
> >
> > http://sdr-radio.com
> >
> >
> >
> > From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of baj4242
> > Sent: 27 July 2010 19:07
> > To: sdr-radio-com@...
> > Subject: [sdr-radio-com] SDR-RADIO request...
> >
> >
> >
> >
> >
> > Hi Simon,
> >
> > You seemed to have nailed the waterfall display (excellent), is there a way that you could allow more control of the update rate for the spectrum displays (both the main and the AF Spectrum pane). Please see Moe's SpectraVue.
> >
> > Thanks.
> >
> > Barry
> > WB2ZXJ
> >
> >
> >
>


Re: Maximum variable filter bandwidth

Alex P
 

Hi Leif,

I followed your instructions and Linrad 3.13 is now installed and I can call it up using the desktop shortcut. I've got the SDR-IQ as the input device and the Realtek set as the output device to the speakers. I'm sure it's something simple, but I'm unable to hear anything coming from the speakers. Also, don't quite know how to correlate the upper frequency display to the received frequency of the IQ. Using a new Windows 7 32 bit Toshiba laptop for this. Also have a legal VAC download available on the PC. Can you direct me to your instructions on how to get this up and running? Thanks. Alex.

--- In sdr-radio-com@..., Leif Asbrink <leif@...> wrote:

Hi Alex,

There is not yet any installer for Linrad. It does not matter
into what directory you put the executable. Just make an
empty directory of your choice and unpack the .zip file
into it.

In case you want to adhere to the standard that will come with
the installers, make the Linrad directory here:
C:&#92;Program Files&#92;linrad&#92;linrad-03.08 or here
C:&#92;Program Files&#92;linrad&#92;linrad-03.13
Depending on which version you have downloaded.
In case you run Windows 200 or Windows 98 the location
would be C:&#92;Program&#92;linrad&#92;linrad-03.xx

When you have linrad.exe, errors.lir and help.lir in a directory,
open Windows explorer and go to the Linrad folder. Right click
linrad.exe inside Windows Explorer. That will open a menu in which
you should click on "Send To" which will open yet another menu
in which you should click on "Desktop" That would create a desktop
icon which you can use to start Linrad from the desktop. (Standard
procedure in Windows.)

As an alternative you can open a command window and go to the
Linrad directory with the cd command and just type "linrad".

Depending on the version you might find that Linrad can not
start because a dll file is missing. You can download the
dll files from the Linrad Home Page:
http://www.sm5bsz.com/linuxdsp/linrad.htm

Right now I am re-writing that page and it will soon have a
more logical structure in which the Linrad installation is
described as a three separate procedures:

1) Install the executable.
2) Install dll files in your system directory.
3) Install the drive routines for your hardware.

The procedures 2 and 3 are to be done once and for all.
The first procedure has to be repeated separately for each
version of Linrad that you might want to install.

There will be installers for the procedures 1 and 2.
(Christoph Peterman, DF9CY is helping me with that.)

Instructions about the proper installation of your hardware
and its drive routines should be the responsibility of
your hardware manufacturer, but for example the Perseus
HF receiver needs a dll and some other binaries that have
to be made available to Linrad. (They can be copied into
the system directory - or all of them could be present in
every Linrad directory.) There will be an installer for
this.

There are many problems with soundcard drive routines
under Windows but that has nothing to do with Linrad.
Driver problems (nice wording for software bugs) may
cause bad behaviour with glitches or mis-aligned samples
on the input or excessive time delay from antenna to
loudspeaker and even extremely high cpu load. Do not
expect every hardware to have well behaved drive
routines for every version of Windows.......

73

Leif / SM5BSZ

I've reviewed quite a bit of your Linrad website and I'm quite impressed. I downloaded the executable that you recommended etc, but I'm having difficulty getting the preferences to stick and I'm not able to get the program to work. I'm sure it's something simple. One of the reasons that I think that I'm having troubles is that I haven't found a file or folder that has all the items necessary in an easy, automatic extractable manner. I'm sure I'm not looking in the right place. Can you please let me know where this file or folder would be ?
Thanks
Best regards.
Alex

--- In sdr-radio-com@..., Leif Asbrink <leif@> wrote:

Hi Alex,

The measurement of power vs time is implemented in the S-meter function
of Linrad which is the same regardless of mode. Although similar
(in a way) to AM the RMS power vs time and the peak power vs time
curves typically represent some kind of averaged values. In Linrad
the peak detector shows the peak power within the selected bandwidth
over a time span corresponding to one pixel in the S meter graph.
You can make it as slow as you want. The RMS power is averaged over
the time corresponding to one pixel. At the maximum speed for
the S meter graph the RMS and the peak power is the same. Both
reflect the power at a given moment in time with an S-meter graph
that updates rapidly enough to measure the momentary power
within the selected bandwidth. I think Linrad is directly applicable
to the Mil 461 standard as specified below by use of the S-meter
graph. (Regardless of receive mode.)

73

Leif / SM5BSZ

I reviewed the Mil 461 bandwidth and detector requirements application. The
bandwidth requirements are specified at the 6 dB points for the following
bandwidths: 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz. For the detector,
to avoid confusion, I'm including a portion of the excerpt verbatim as follows:

"A.4.3.10.1 (4.3.10.1) Detector.
A peak detector shall be used for all frequency domain emission and
susceptibility
measurements. This device detects the peak value of the modulation envelope in
the receiver
bandpass. Measurement receivers are calibrated in terms of an equivalent Root
Mean Square
(RMS) value of a sine wave that produces the same peak value. When other
measurement devices
such as oscilloscopes, non-selective voltmeters, or broadband field strength
sensors are used for
susceptibility testing, correction factors shall be applied for test signals to
adjust the reading to
equivalent RMS values under the peak of the modulation envelope.
Discussion: The function of the peak detector and the meaning of the output
indication on the
measurement receiver are often confusing. Although there may appear to be an
inherent
discrepancy in the use of the terms "peak" and "RMS" together, there is no
contradiction. All
detector functions (that is peak, carrier, field intensity, and quasi-peak)
process the envelope of
the signal present in the receiver intermediate frequency (IF) section. All
outputs are calibrated
in terms of an equivalent RMS value. For a sine wave input to the receiver, the
signal envelope
in the IF section is a DC level and all detectors produce the same indicated RMS
output.Calibration in terms of RMS is necessary for consistency."

The requirements also state that the 'worst case' emissions need to be captured
over the measurement time interval. AGC is not typically implemented. My
intent in stating the 'peak hold' term of my prior post was to include a
feature which captures and holds in memory the peak emission value. SV appears
to include this function in the 'Memory Mode' as the "Max memory display"
option. I've used this option often and it is great to have.

Regarding the wideband digital modes, the decoding would be done by specialty
decoding algorithms resident on the PC which would be invoked by the user. The
closest example would be the DRM application with VAC. The front-end would need
to accomodate the emission bandwidth which is then piped to the various decoding
algorithms.

By the way, the numeric signal strength panels looks great. My preference is
to keep the 'mechanical meter' also---Looks alot like the one on my Drake R-4a.
From what I've read in the forum from other members, it looks like there is a
wide range of preferences for this item. Seems like this is an area where the
user could select their personal preferences from an options menu.

Let me know if you have questions...
Best regards
Alex





________________________________
From: Simon HB9DRV <simon@>
To: sdr-radio-com@...
Sent: Thu, July 1, 2010 8:57:46 PM
Subject: RE: [sdr-radio-com] Maximum variable filter bandwidth


Hi,

100kHz bandwidth I understand, what's the peak hold - AGC or... ?

For these wide digital modes how would you want the output - via a soundcard?

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

From:sdr-radio-com@ yahoogroups. com [mailto:sdr- radio-com@ yahoogroups. com]
On Behalf Of Alex P

It would be desirable to have a 100 KHz variable AM bandwidth with a peak-hold
option which works with the SDR-IQ. Regarding the maximum bandwidth
question, there are digital modes that have bandwidths substantially larger
than 190 KHz to be used above 30 MHz. Currently there is a digital mode on HF
that uses a 25 KHz bandwidth which may be expanded to 75 KHz. Best regards. Alex





Re: S-Meter

Alex P
 

Simon. Could you also add uV and dBuV ? Thanks! Alex.

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

Yes, can do this.



Simon Brown, HB9DRV

http://sdr-radio.com



From: sdr-radio-com@... [mailto:sdr-radio-com@...]
On Behalf Of gi8ydz



Hi Simon,

On the dbm meter could we have the updating digits in dbm as opposed to S
values ?

Thanks for the console, works great in Win XP sp2 and Vista, no crashes
since the last patch, very stable.