Re: [wsjt-devel] Raspberry PI

[Bill Somerville]

On 15/01/2016 12:31, Paul wrote:
> Can any one tell me if the IQ software will be added to wsjtx.
Hi Paul,

it is not currently being worked on. In general there are two related 
issues with using IQ data, firstly it has to be "demodulated" and 
secondly the mode and frequency of demodulation needs to be set. These 
equate roughly to setting the dial frequency and mode on an analog rig. 
Most receiver implementations that provide IQ data have some sort of CAT 
interface to set their LO frequency and a separate SDR application is 
needed to demodulate to audio. AFAIK all these SDR applications provide 
a CAT interface that emulates some analog rig. Therefore running an SDR 
application meets all the requirements for WSJT-X.

I suggest that you investigate using HDSDR or similar as an intermediary 
between the receiver (and transmitter) and WSJT-X. We have made 
allowance in the WSJT-X/Hamlib sources to make them work with HDSDR when 
the TS-2000 rig type is used. You cannot use split operating for 
JT9+JT65 dual mode but that should not be necessary with an all digital 
audio chain and the ability to select 4kHz wide filters for Rx and Tx.

73
Bill
G4WJS.

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Re: [wsjt-devel] Raspberry PI

[nick]

On 15/01/16 12:42, Bill Somerville wrote:
> I suggest that you investigate using HDSDR or similar as an intermediary
> between the receiver (and transmitter) and WSJT-X

Paul

I use dttsp/sdr-shell/jack running on Mint linux for this purpose.

It works well.

73

Nick G3VNC


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Re: [wsjt-devel] Raspberry PI

[Richard Bown]

On Fri, 15 Jan 2016 14:46:44 -0200
"Edson W. R. Pereira"  wrote:

> Hi Richard,
> 
> Ok! My apologies. I must have misunderstood what you wrote.
> 
> 73, Edson PY2SDR
> 
> 
HI Edson

I tried to simplify it as much as possible, may be too much, but I was under 
the impression

that the originator of the question may not of understood the full process.

BTW I still use dttsp and SDR-shell, IMO it still is one the best for detecting 
the presence of a
signal below ear detection threshold.
-- 
-- 
Best wishes /73 
Richard Bown

Email : rich...@g8jvm.com
HTTP  :  http://www.g8jvm.com
nil carborundum a illegitemis
##
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[wsjt-devel] Raspberry Pi

[Paul]

Thanks for your comments and suggestions.

I agree that a complex detector is not needed to decode signals from a Softrock 
and I have been able to decode JT65 and JT9 signals using wsjtx on both my RPi 
2 and windows.
The RPi 2 version of wsjtx I use was via a direct download. 
I did not appreciate that I could use HDSDR as an intermediate – so I will look 
to try this. I currently use HDSDR and PowerSDR for ssb contacts.

Now I tried to compile and build the current version of wsjtx on my RPi 2 using 
JTSDK and I got the following error:
C++ internal compiler error, immediately after  Building CXX object ... 
/echograph.cpp.o

Can someone help please.

73 
Paul m1bkl--
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Re: [wsjt-devel] Raspberry PI

[Edson W. R. Pereira]

Hi Richard,

Ok! My apologies. I must have misunderstood what you wrote.

73, Edson PY2SDR


---
- We humans have the capability to do amazing things if we work together.
- Nós seres humanos temos a capacidade de fazer coisas incríveis se
trabalharmos juntos.

On Fri, Jan 15, 2016 at 2:39 PM, Richard Bown  wrote:

> On Fri, 15 Jan 2016 14:23:48 -0200
> "Edson W. R. Pereira"  wrote:
>
> > On Fri, Jan 15, 2016 at 11:31 AM, Richard Bown 
> wrote:
> >
> > >
> > > You can feed a SDR with just an single audio feed and you will see the
> > > local ocillator and a
> > > positive spectrum on the right and a negative on the left, using a I
> > > input allows you to remove
> > > the unwanted sideband , ie the negative image to the left. or vice
> versa
> > > if you select that.
> > >
> > >
> > Richard,
> >
> > I'm afraid this is incorrect. If you use only one of the channels and
> run a
> > real to real FFT on it you will see a mirrored spectrum. The negative
> > spectrum will be an exact mirror of the positive one. In order to see
> > negative and positive frequencies you will need both audio channels (I
> and
> > Q) and run a complex FFT.
> >
> > 73, Edson PY2SDR
>
>  Thats what I said Edson :)
>
> --
> --
> Best wishes /73
> Richard Bown
>
> Email : rich...@g8jvm.com
> HTTP  :  http://www.g8jvm.com
> nil carborundum a illegitemis
>
> ##
> Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 23 cms 140W, 13 cms 100W &
> 3cms 5W
> Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
> QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 400W, 70cms 200W
> OS: Linux Mint 17.3 x86_64 on a Dell Inspiron N5030 laptop
>
> ##
>
>
>
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Re: [wsjt-devel] possible defect in the FFT code

[Joe Taylor]

Igor --

Please feel free to tune the WSJT-X decoders in any way you see fit, and 
to use external bandpass filters on the data as you wish.

One of the benefits of open-source code is that you can modify it as you 
desire.  If you come up with code you believe is superior, I'm sure you 
will let us know.

Right now our major focus and priorities lie in other directions.

-- 73, Joe, K1JT

On 1/15/2016 1:39 AM, Игорь Ч wrote:
>
> Hi Joe and All,
> Many thanks to Mikhail R3LW, who pointed me to this issue.
> In order to reproduce it one shall tune FTRSD decoder to maximum sensitivity 
> for second pass:
> 1st pass thresh0=2.4
> 2nd pass thresh0=1.0
> _
> Test #1, original audio file brings these JT65 decodes:
> 2227 -15 0.8 1262 # CQ IZ0MIT JN61
> 2227 -21 1.0 1360 # CQ IK2HTY JN45
> 2227 -15 1.3 1626 # ZP9CTS HA3LI JN96
> 2227 -9 0.8 2030 # CQ I1RJP JN45
> 2227 -14 0.9 2128 # JF3SUL SQ5PFF 73
> 2227 -21 1.3 2320 # E9DX YT1DL KN04
> __
> Test #2, 800...1000 Hz band pass filter is applied, now modified audio file 
> brings additional decode:
>  -25 0.9 2169 # W4MMP WB9OTX -01
> __
> Test #3, 600...800 Hz band pass filter is applied, now modified audio file 
> brings additional decodes:
>  -20 1.6 1962 # KJ3N 9A6CC -20
>  -25 0.9 2169 # W4MMP WB9OTX -01
> __
> Test #4, 5700...6000 Hz band pass filter is applied, now modified audio file 
> brings additional decodes:
>  -27 1.1 799 # ER1PB PD2HAB JO22
>  -25 0.9 2169 # W4MMP WB9OTX -01
> All these tests raise question on correctness of the FFT implementation in 
> the WSJT-X code.
> For repro I used thresh0 modified r6373, JT65+JT9, Random Erasure Patterns=8. 
> Bandpass filter has 30dB rejection outside it's bandwidth.
> I have put audio files there: https://cloud.mail.ru/public/2FYq/iTExXKrnp
> 73 Igor UA3DJY
>
>
>
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Re: [wsjt-devel] Raspberry PI

[Richard Bown]

On Fri, 15 Jan 2016 12:42:35 +
Bill Somerville  wrote:

> On 15/01/2016 12:31, Paul wrote:
> > Can any one tell me if the IQ software will be added to wsjtx.
> Hi Paul,
> 
> it is not currently being worked on. In general there are two related 
> issues with using IQ data, firstly it has to be "demodulated" and 
> secondly the mode and frequency of demodulation needs to be set. These 
> equate roughly to setting the dial frequency and mode on an analog rig. 
> Most receiver implementations that provide IQ data have some sort of CAT 
> interface to set their LO frequency and a separate SDR application is 
> needed to demodulate to audio. AFAIK all these SDR applications provide 
> a CAT interface that emulates some analog rig. Therefore running an SDR 
> application meets all the requirements for WSJT-X.
> 
> I suggest that you investigate using HDSDR or similar as an intermediary 
> between the receiver (and transmitter) and WSJT-X. We have made 
> allowance in the WSJT-X/Hamlib sources to make them work with HDSDR when 
> the TS-2000 rig type is used. You cannot use split operating for 
> JT9+JT65 dual mode but that should not be necessary with an all digital 
> audio chain and the ability to select 4kHz wide filters for Rx and Tx.
> 
> 73
> Bill
> G4WJS.
> 
>
I'm not that sure that IQ software is needed for using a softrock with wsjtx

The output streams form the softrock are audio,just one stream 90 degrees out 
of phase with the
other.
The width of the frequency displayed on a SDR fed from a softrock depends on 
the bandwidth of the
audio card and the sampling rate. as the LO is not being swept the content is 
stable.
So if you then filter one of the streams, it doesn't matter which , you will 
see whats in the
bandwidth of that filter
So Just connect just one of the outputs of the softrock  in to the audio input 
of the soundcard, 
and as far as I'm aware it will work fine with wsjtx, remember you will have to 
tune the softrock
as you would a normal receiver.
You can feed a SDR with just an single audio feed and you will see the local 
ocillator and a
positive spectrum on the right and a negative on the left, using a I input 
allows you to remove
the unwanted sideband , ie the negative image to the left. or vice versa if you 
select that.

All the softrock is , is superhet Rx with a DC IF, the output is DC to what 
ever the upper audio
freq response  ( as a microwave merchant I regard anything below 100 MHz as DC 
with some ripple !)

The audio output is exactly the same ish as taking the the audio from a 
Receiver post demodulator,
ie audio.

Just connect it and select either one of the audio o/ps from the softrock.

HTH


-- 
-- 
Best wishes /73 
Richard Bown

Email : rich...@g8jvm.com
HTTP  :  http://www.g8jvm.com
nil carborundum a illegitemis
##
Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 23 cms 140W, 13 cms 100W & 3cms 5W
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 400W, 70cms 200W
OS: Linux Mint 17.3 x86_64 on a Dell Inspiron N5030 laptop
##
 


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Re: [wsjt-devel] Raspberry PI

[Richard Bown]

On Fri, 15 Jan 2016 13:32:35 +
nick  wrote:

> On 15/01/16 12:42, Bill Somerville wrote:
> > I suggest that you investigate using HDSDR or similar as an intermediary
> > between the receiver (and transmitter) and WSJT-X
> 
> Paul
> 
> I use dttsp/sdr-shell/jack running on Mint linux for this purpose.
> 
> It works well.
> 
> 73
> 
> Nick G3VNC
> 
hi Nick
That may well work on a Rasp PI2/PI2 clone , sdr-shell is QT4 and Franks dttsp 
shouldn't grab too
much of the resources, there are later versions where core to shell are usable 
with a network
connection between. there is a separate yahoo group for this.

-- 
-- 
Best wishes /73 
Richard Bown

Email : rich...@g8jvm.com
HTTP  :  http://www.g8jvm.com
nil carborundum a illegitemis
##
Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 23 cms 140W, 13 cms 100W & 3cms 5W
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 400W, 70cms 200W
OS: Linux Mint 17.3 x86_64 on a Dell Inspiron N5030 laptop
##
 


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Re: [wsjt-devel] Raspberry PI

[Edson W. R. Pereira]

Hello Nick,

I am glad to see that sdr-shell is still useful and is still being used ten
years after I first released it.

73, Edson PY2SDR


---
- We humans have the capability to do amazing things if we work together.
- Nós seres humanos temos a capacidade de fazer coisas incríveis se
trabalharmos juntos.

On Fri, Jan 15, 2016 at 11:32 AM, nick  wrote:

> On 15/01/16 12:42, Bill Somerville wrote:
> > I suggest that you investigate using HDSDR or similar as an intermediary
> > between the receiver (and transmitter) and WSJT-X
>
> Paul
>
> I use dttsp/sdr-shell/jack running on Mint linux for this purpose.
>
> It works well.
>
> 73
>
> Nick G3VNC
>
>
>
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Re: [wsjt-devel] Raspberry PI

[Richard Bown]

On Fri, 15 Jan 2016 14:23:48 -0200
"Edson W. R. Pereira"  wrote:

> On Fri, Jan 15, 2016 at 11:31 AM, Richard Bown  wrote:
> 
> >
> > You can feed a SDR with just an single audio feed and you will see the
> > local ocillator and a
> > positive spectrum on the right and a negative on the left, using a I
> > input allows you to remove
> > the unwanted sideband , ie the negative image to the left. or vice versa
> > if you select that.
> >
> >
> Richard,
> 
> I'm afraid this is incorrect. If you use only one of the channels and run a
> real to real FFT on it you will see a mirrored spectrum. The negative
> spectrum will be an exact mirror of the positive one. In order to see
> negative and positive frequencies you will need both audio channels (I and
> Q) and run a complex FFT.
> 
> 73, Edson PY2SDR

 Thats what I said Edson :)

-- 
-- 
Best wishes /73 
Richard Bown

Email : rich...@g8jvm.com
HTTP  :  http://www.g8jvm.com
nil carborundum a illegitemis
##
Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 23 cms 140W, 13 cms 100W & 3cms 5W
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 400W, 70cms 200W
OS: Linux Mint 17.3 x86_64 on a Dell Inspiron N5030 laptop
##
 


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Re: [wsjt-devel] Raspberry PI

[Edson W. R. Pereira]

On Fri, Jan 15, 2016 at 11:31 AM, Richard Bown  wrote:

>
> You can feed a SDR with just an single audio feed and you will see the
> local ocillator and a
> positive spectrum on the right and a negative on the left, using a I
> input allows you to remove
> the unwanted sideband , ie the negative image to the left. or vice versa
> if you select that.
>
>
Richard,

I'm afraid this is incorrect. If you use only one of the channels and run a
real to real FFT on it you will see a mirrored spectrum. The negative
spectrum will be an exact mirror of the positive one. In order to see
negative and positive frequencies you will need both audio channels (I and
Q) and run a complex FFT.

73, Edson PY2SDR
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Re: [wsjt-devel] Raspberry Pi

[Bill Somerville]

On 15/01/2016 17:53, Paul wrote:
> C++ internal compiler error, immediately after Building CXX object ... 
> /echograph.cpp.o
Compiler ICE messages are sometimes due to resource limitations. If you 
are using a parallel build (-j) then try without it. Try increasing the 
process virtual memory limit. Aside from those it may be simply a 
compiler defect, check for updates.

73
Bill
G4WJS.

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Re: [wsjt-devel] Raspberry Pi

[Richard Bown]

On Fri, 15 Jan 2016 17:53:37 -
"Paul"  wrote:

> Thanks for your comments and suggestions.
> 
> I agree that a complex detector is not needed to decode signals from a 
> Softrock and I have been
> able to decode JT65 and JT9 signals using wsjtx on both my RPi 2 and windows. 
> The RPi 2 version
> of wsjtx I use was via a direct download. I did not appreciate that I could 
> use HDSDR as an
> intermediate – so I will look to try this. I currently use HDSDR and PowerSDR 
> for ssb contacts.
> 
> Now I tried to compile and build the current version of wsjtx on my RPi 2 
> using JTSDK and I got
> the following error: C++ internal compiler error, immediately after  Building 
> CXX
> object ... /echograph.cpp.o
> 
> Can someone help please.
> 
> 73 
> Paul m1bkl

Paul look at the last long line during the compile, and the couple of lines 
afterwards.
In that you should be able to see it cant find a lib or file.
then try installing that lib with the -dev suffix.

Now if you have another computer running linux, one of the debian variants, 
mint ,ubuntu ect
open synaptic and search with the filename that was in those last lines.
When you see the results make a note of those with that look the same with a 
-dev on the end of the
filename.
Then go back to the PI and use apt-get to install the missing lib, and try the 
compile again.
There apt CLI commands to do similat, see man apt and man apt-get.
I've guessed you are running raspberian .
HTH

-- 
-- 
Best wishes /73 
Richard Bown

Email : rich...@g8jvm.com
HTTP  :  http://www.g8jvm.com
nil carborundum a illegitemis
##
Ham Call: G8JVM . QRV: 50-432 MHz + Microwave 23 cms 140W, 13 cms 100W & 3cms 5W
Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 400W, 70cms 200W
OS: Linux Mint 17.3 x86_64 on a Dell Inspiron N5030 laptop
##
 


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Re: [wsjt-devel] Raspberry PI

[nick]

On 15/01/16 14:41, Richard Bown wrote:
> core to shell are usable with a network
> connection between. there is a separate yahoo group for this

I did not know that.

What is the group name please Richard?

73

Nick G3VNC


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Re: [wsjt-devel] sdr-shell

[Richard Bown]

On Fri, 15 Jan 2016 20:10:10 +
nick  wrote:

> On 15/01/16 14:56, Edson W. R. Pereira wrote:
> > I am glad to see that sdr-shell is still useful and is still being used ten
> > years after I first released it.
> 
> Hi Edson
> 
> Firstly, a big thank you for all your hard work on sdr-shell.  It has 
> proved invaluable here in this non-Windows environment for controlling 
> dttsp.
> 
> I have written various shell scripts to drive dttsp, but I always 
> include sdr-shell because it has so much useful functionality.
> 
> My experience with dttsp/sdr-shell is that it is very economical with 
> machine resources.  It is in use here on a daily basis for CW and other 
> digital modes on HF.
> 
> So far I have managed to make it do everything I want with the Softrock 
> RXTX.
> 
> 73
> 
> Nick G3VNC
> 
> 
> 
Hi Nick
try the "dttsp-linux" yahoo group , there was activity on the list last in 
October.
I cant remember the name of the group supporting the follow on project.
HTH

-- 
-- 
Best wishes /73 
Richard Bown

Email : rich...@g8jvm.com
HTTP  :  http://www.g8jvm.com
nil carborundum a illegitemis
##
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[wsjt-devel] sdr-shell

[nick]

On 15/01/16 14:56, Edson W. R. Pereira wrote:
> I am glad to see that sdr-shell is still useful and is still being used ten
> years after I first released it.

Hi Edson

Firstly, a big thank you for all your hard work on sdr-shell.  It has 
proved invaluable here in this non-Windows environment for controlling 
dttsp.

I have written various shell scripts to drive dttsp, but I always 
include sdr-shell because it has so much useful functionality.

My experience with dttsp/sdr-shell is that it is very economical with 
machine resources.  It is in use here on a daily basis for CW and other 
digital modes on HF.

So far I have managed to make it do everything I want with the Softrock 
RXTX.

73

Nick G3VNC



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[wsjt-devel] Test wav files

[Michael Black]

Do we have a link where some of the test files used previously might be
available along with test scripts?
Back when testing was being done during the improvements there were several
hundred files being used but I can't find any reference/link for them.

RRR
Mike W9MDB
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Re: [wsjt-devel] Test wav files

[Bill Somerville]

On 15/01/2016 21:45, Michael Black wrote:
> Do we have a link where some of the test files used previously might be
> available along with test scripts?
Hi Mike,

developers tend to accumulate their own test files. If you say which 
mode and band you are interested in maybe someone can make theirs available.

73
Bill
G4WJS.

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Re: [wsjt-devel] Test wav files

[Joe Taylor]

Mike --

Whatever tests you might choose to do would have more value if they were 
your own -- i.e., independent of tests already done by others.

If you want representative JT9 and JT65 data, set up in dual mode on 
14.076, on a weekend in daytime, check "Save all", and let it run for 
all day.  In ten hours you'll have 600 files and probably 5000 or more 
decodes.

-- Joe, K1JT

On 1/15/2016 4:45 PM, Michael Black wrote:
> Do we have a link where some of the test files used previously might be
> available along with test scripts?
> Back when testing was being done during the improvements there were several
> hundred files being used but I can't find any reference/link for them.
>
> RRR
> Mike W9MDB
>
>
>
>
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>
>
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