Date   

Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Siegfried Jackstien
 

youre welcome

yepp ... i found it :-)

i also had a similar thingy when i first fired up an lnb with unknown freqency ..but mine was not 240 kc off but "only" 24 kc or so ... i used an fcdpp and there were only the beacons (no other hams making contacts) and i was just tuned to the wrong side of the transponder ...

hmm ... out of scope wth a funcbe dongel ... ok ... but an rtl dongle has a much wider view

how could you oversee this?!?

maybe we need a "step by step" list how setup should be done

that a user first should "do the math" and check where his lnb works ... and if he then types in the correct lnb frequency ... that he then has to tune upwards

ok ... anyway ... problem found ... problem solved

it feels so good when i can help :-)

have fun

dg9bfc sigi


Am 12.04.2019 um 22:36 schrieb Alexandr OK1DST:

Hi Sigi!
You were right - it was out of scope here with RTL-SDR (probably the same will be with FCD) - my mistake :-(
(I was confused that on direct frequency everything was ok and on converted there was nothing)

Now it seems to run OK - end of alarm :-)
Thanks for help,
73
L. -dst-


FM Stereo DXing

Simon Brown
 

So,

 

Adding a RDS logfile: https://www.sdr-radio.com/Blog/PostId/59/band-ii-dxing

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 


Re: FM Stereo DXing - Polarisation?

Leif Asbrink
 

Hi Michael,

Over water a horizontally polarised signal
can become "twisted" to mixed-polarity or
to mainly vertical.

This happened with our digital TV signal
from across the Bristol Channel from Wales.

Vertical components "twisted" over water from
the transmitted horizontally polarised signal
then interfered with vertically polarised signals
from low-power transmitters on the same frequency.

The OFCOM inspector comfirmed this, stating
that it was a rare occurence, but did also
happen elsewhere in the UK with digital
TV signals crossing expanses of water.
I am afraid the OFCOM inspector mis-interpreted the
mechanism when he confirmed what actually happened.

The transmitted horizontal signal from Wales could
be transmitted over water in a duct. Two-dimensional
propagation with VERY low loss. Then the VERY large
horizontal field strength would be reflected on
various structures near the receiver and cause
a vertical component that would be very strong.

I bet you would find that the event is associated with
a tropo duct event. You could probably find data on the
Internet if you know the time when this happened.


In June there will a new reallocation of
DTV multiplex frequencies as the 700MHz
band is cleared for 5G - so we might
well have similar problems again :-(
Frequency allocation is non-trivial. Under certain
circumstances things break down. Around here
during strong aurora - but also when we have
very good conditions on VHF because of tropospheric
ducting. It happens, but not often that Es destroys
reception on the FM band for people in rural locations.

In your case, across the Bristol channel, I think
the frequency planners should take the high probability
of ducting over water into account and not allocate the
same frequency on both sides of the channels. The
normal attenuation between V and H would not be
enough when a duct increases the field strength by
something like 40 dB.

In the current thread this might have
application for SDR reception.
Not SDR specifically. It is equally relevant regardless
of what radio one is using.

73

Leif


Re: FM Stereo DXing - Polarisation?

Michael.2E0IHW
 

Hi Leif,

Over water a horizontally polarised signal
can become "twisted" to mixed-polarity or
to mainly vertical.

This happened with our digital TV signal
from across the Bristol Channel from Wales.

Vertical components "twisted" over water from
the transmitted horizontally polarised signal
then interfered with vertically polarised signals
from low-power transmitters on the same frequency.

The OFCOM inspector comfirmed this, stating
that it was a rare occurence, but did also
happen elsewhere in the UK with digital
TV signals crossing expanses of water.

In June there will a new reallocation of
DTV multiplex frequencies as the 700MHz
band is cleared for 5G - so we might
well have similar problems again :-(

In the current thread this might have
application for SDR reception.

Best 73s

Michael 2E0IHW



Hello Michael,

it is a well known fact that a circularly polarized
wave that is reflected once at 90 degrees on a flat
surface changes rotation. Left to right an vice versa.
Linear polarization is reflected back as the same linear.

All radio amateurs who use the moon as a reflector for
communication know this. Circular is the polarization
they use on many microwave bands.

Multiple reflections may cause any polarization
to change into any other polarization.

Not stating clearly what you are talking about causes
confusion.

The OFCOM chap must have talked about the transmission
channel and how it affects polarization, not about
how a certain polarization is received by different antennas.

Leif


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Alexandr OK1DST
 

Hi Sigi!
You were right - it was out of scope here with RTL-SDR (probably the same will be with FCD) - my mistake :-(
(I was confused that on direct frequency everything was ok and on converted there was nothing)

Now it seems to run OK - end of alarm :-)
Thanks for help,
73
L. -dst-


Re: FM Stereo DXing - Polarisation?

Leif Asbrink
 

Hello Michael,

it is a well known fact that a circularly polarized
wave that is reflected once at 90 degrees on a flat
surface changes rotation. Left to right an vice versa.
Linear polarization is reflected back as the same linear.

All radio amateurs who use the moon as a reflector for
communication know this. Circular is the polarization
they use on many microwave bands.

Multiple reflections may cause any polarization
to change into any other polarization.

Not stating clearly what you are talking about causes
confusion.

The OFCOM chap must have talked about the transmission
channel and how it affects polarization, not about
how a certain polarization is received by different antennas.

Leif


(Summary : sorry José, science and our experience
say your friend ain't right. Even the OFCOM chap
stated that this confluence was unusual, but verified.)

Given the polarisation issue of this thread, it may
be useful to include evidence of polar-twist.
Who am I to doubt the observation of an OFCOM emmisary?  

Michael

On 12/04/2019 17:25, jose maria trueba wrote:> A friend told me that reflections do change left hand circular into > right hand and the other way around, but not vertical into horizontal.
Sorry!



Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Siegfried Jackstien
 

lnb works ... but is 240 kc wrong


Am 12.04.2019 um 21:00 schrieb Simon Brown:

OK,

 

Thinking:

 

  • Are you 100% sure you know the LO value for your LNB?
  • Have you tried searching for signals?
  • The center frequency is not the same in both cases once the 9750 MHz offset is taken into consideration.

 

My only suggestion now is that the LNB LO is either wrong or the LNB doesn’t work this far down in frequency.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of gm7eey@...
Sent: 11 April 2019 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

Another try, attached this time :)


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Siegfried Jackstien
 

wrong settings

lnb offset wrong


Am 12.04.2019 um 20:46 schrieb Simon Brown:

Thanks,

 

Makes no sense so must be a software bug. I will investigate tomorrow as it’s getting a bit late and my brain hurts!

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of gm7eey@...
Sent: 11 April 2019 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

Another try, attached this time :)


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Siegfried Jackstien
 

alex type in 9.750.240.000 ... and it works!!!

your lnb is 240 kc off and cause yo receive with a "narrowband sdr" you just did not see the signals

try it it will work!!!

i see the psk beacon on 560 on yor screenshot ... but it is on 800


Am 12.04.2019 um 21:47 schrieb Alexandr OK1DST:

And my settings


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Siegfried Jackstien
 

simon i guess i found it (the reason why he does not receive anything)

his lnb is 240 kc off (i see psk beacon on 560 and not on 800)

and when lnb is 240 away ... and transponder is also only 250 wide and fcd old is 96kc and new is 192 kc) ... then he is just close to it but did not find the right spot for receive

he should type in 9750.240.000 as offset and then voila it will work

dg9bfc sigi

Am 12.04.2019 um 21:10 schrieb Simon Brown:

Hi,

 

Show me this window, ignore my definitions, I want to see yours:

 

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 12 April 2019 22:05
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

 

Sorry,

 

Sent too soon! My ideas below make no sense based on your screenshots!

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 12 April 2019 22:01
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

OK,

 

Thinking:

 

  • Are you 100% sure you know the LO value for your LNB?
  • Have you tried searching for signals?
  • The center frequency is not the same in both cases once the 9750 MHz offset is taken into consideration.

 

My only suggestion now is that the LNB LO is either wrong or the LNB doesn’t work this far down in frequency.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of gm7eey@...
Sent: 11 April 2019 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

Another try, attached this time :)


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Siegfried Jackstien
 

but you did not tune upwards ... to 10 gig

your screenshot still shows the 739 something

tune up wards

then it should work (it does here with same settings on my fcdpp ... tested on w7 and w10)

but .... your lnb is 240 kc off... now if you type in the "nominal offset" ... your are not on the transponder anymore ... (fcd old 99 kc fcd new 192 kc ... but your lnb is 240 off and also transponder is only 250 kc wide)

that may explain why you do not receice anything

i see the psk beacon at 560 ... but in real the beacon is on 800 so lnb offset is not correct

greetz sigi dg9bfc

Am 12.04.2019 um 21:42 schrieb Alexandr OK1DST:

Just for full report - attached printscreen.
You can see "9750MHz" info in RX info, downconverter settings verified several times etc...
-dst-


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Alexandr OK1DST
 

And my settings


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Alexandr OK1DST
 

Just for full report - attached printscreen.
You can see "9750MHz" info in RX info, downconverter settings verified several times etc...
-dst-


Can't connect to any remote servers

Emma Hones
 

Hi there,

Greatly enjoying using the software with my radios. Thank you for all your hard work!

I've run into a bit of an issue when trying to connect to remote servers, however. The console has no issue making the connection, but I never see a waterfall or audio, and the logfile is spammed with variations on:

17:05:24.686: Radio V3ServerReader> Read failure: read = 0 of 2486, error code 10045 = Operation not supported.
17:05:24.686: Radio V3ServerReader> Failed to read IQ data body

I perused the group archives and found another case of this occurring a few months back - but strangely it was never resolved? I followed a suggestion offered then and disabled both the Windows firewall and my modem's, but neither helped. At this point I'm thoroughly mystified...

Thanks in advance.

Emma


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Simon Brown
 

Hi,

 

Show me this window, ignore my definitions, I want to see yours:

 

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 12 April 2019 22:05
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

 

Sorry,

 

Sent too soon! My ideas below make no sense based on your screenshots!

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 12 April 2019 22:01
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

OK,

 

Thinking:

 

  • Are you 100% sure you know the LO value for your LNB?
  • Have you tried searching for signals?
  • The center frequency is not the same in both cases once the 9750 MHz offset is taken into consideration.

 

My only suggestion now is that the LNB LO is either wrong or the LNB doesn’t work this far down in frequency.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of gm7eey@...
Sent: 11 April 2019 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

Another try, attached this time :)


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Simon Brown
 

 

Sorry,

 

Sent too soon! My ideas below make no sense based on your screenshots!

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 12 April 2019 22:01
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

OK,

 

Thinking:

 

  • Are you 100% sure you know the LO value for your LNB?
  • Have you tried searching for signals?
  • The center frequency is not the same in both cases once the 9750 MHz offset is taken into consideration.

 

My only suggestion now is that the LNB LO is either wrong or the LNB doesn’t work this far down in frequency.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of gm7eey@...
Sent: 11 April 2019 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

Another try, attached this time :)


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Simon Brown
 

OK,

 

Thinking:

 

  • Are you 100% sure you know the LO value for your LNB?
  • Have you tried searching for signals?
  • The center frequency is not the same in both cases once the 9750 MHz offset is taken into consideration.

 

My only suggestion now is that the LNB LO is either wrong or the LNB doesn’t work this far down in frequency.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of gm7eey@...
Sent: 11 April 2019 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

Another try, attached this time :)


Re: sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

Simon Brown
 

Thanks,

 

Makes no sense so must be a software bug. I will investigate tomorrow as it’s getting a bit late and my brain hurts!

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of gm7eey@...
Sent: 11 April 2019 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] sdr console 3.0.7 loses FCD RX with 9750 offset applied #satellites #sdrconsolev3

 

Another try, attached this time :)


Re: Running SDRconsole under Win10

Simon Brown
 

USB Power?

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Barry Chambers
Sent: 12 April 2019 17:14
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] Running SDRconsole under Win10

 

I have been running SDRConsole 3.06 on my Win 7 laptop with a SDRPlay RSP2 and it works well so I decided to install it on my Win10 laptop. The installation went OK but I cannot get the software to start after selecting my  RSP2..

I have save the diagnostics file but how do I attach this?


Re: FM Stereo DXing - Polarisation?

Michael.2E0IHW
 

José, desgraciadamente, según la sciencia y nuestra
esperiencia indiscutable, su amigo no tiene razón.
Verdad: y el investigator de OFCOM reconocía que
se trataba de verificadas circunstancias técnicas
raramente encontrabas.

(Summary : sorry José, science and our experience
say your friend ain't right. Even the OFCOM chap
stated that this confluence was unusual, but verified.)

Given the polarisation issue of this thread, it may
be useful to include evidence of polar-twist.
Who am I to doubt the observation of an OFCOM emmisary?  

Michael


On 12/04/2019 17:25, jose maria trueba wrote:
> A friend told me that reflections do change left hand circular into
> right hand and the other way around, but not vertical into horizontal.
> Sorry!