Date   
Re: Signal

James Brown
 

I was reiterating the ‘reason’ or excuse, depending on your viewpoint!
It will probably turn out to be interference rather than loss of power, though I did wonder  if it was a satellite station keeping manoeuvre until I saw David’s graphs.

Cheers,
James

On 14 Sep 2019, at 10:49, geojohnt via Groups.Io <geojohnt@...> wrote:

James,

Well, many users graphs show a distinct step down in SNR.
And indeed we have been here before - 3 times, if I recall correctly?
And although 'something' was tweaked 'their end' on every occasion, I never got back to my original SNR levels.

A couple of years ago I was getting 14.3 dB SNR during the 'diurnal max.' period with a 1 m dish and Inverto Black Ultra LNB and an SR1.
Diurnal max now is - was - around 13.4/5 dB
I'm not on 'diurnal max' at this time today and my BS SNR is currently 12.6 - 12.8 dB.

OK, I still have quite a high link margin on BS so no problem.
But I don't think this is a dish/LNB deficiency but a transmitted power 'reduction.'

There hasn't been any 'bad weather' over the uplink station yesterday and certainly not today.

?????

Regards,
John.

++++++++++++++++++++++++++++

In a message dated 13/09/2019 19:00:21 GMT Standard Time, satellite@... writes:


This is not good news! IIRC we have been here before and has only
resulted in LNB and dish deficiencies being identified, rather than
adjacent transponder issues. I do hope not, but am not holding my breath!

James

Re: Signal

geojohnt@...
 

All,

For what it's worth, here are my received Eutelsat 10 A signal comparisons earlier as shown by the Inverto SatPal meter.

They are EUMETCast on 11.263 GHz H.
Tricolor IPTV on 11.263 GHz V.
A 'Eutelsat channel' (DVB-S) MPEG 4 on 11.346 GHz H, which might give me an ongoing steady signal level marker?

My SR1 was showing a SNR at the time of 12.8/9 dB.
The Power reading was -25 dBm - as always.

The SatPal meter will not demodulate VCM/ACM data signals and so just gives a signal level, not SNR, link margin and mosaic - as it does with 'TV signals.'

Regards,
John.





Re: Signal

geojohnt@...
 

James,

Well, many users graphs show a distinct step down in SNR.
And indeed we have been here before - 3 times, if I recall correctly?
And although 'something' was tweaked 'their end' on every occasion, I never got back to my original SNR levels.

A couple of years ago I was getting 14.3 dB SNR during the 'diurnal max.' period with a 1 m dish and Inverto Black Ultra LNB and an SR1.
Diurnal max now is - was - around 13.4/5 dB
I'm not on 'diurnal max' at this time today and my BS SNR is currently 12.6 - 12.8 dB.

OK, I still have quite a high link margin on BS so no problem.
But I don't think this is a dish/LNB deficiency but a transmitted power 'reduction.'

There hasn't been any 'bad weather' over the uplink station yesterday and certainly not today.

?????

Regards,
John.

++++++++++++++++++++++++++++

In a message dated 13/09/2019 19:00:21 GMT Standard Time, satellite@... writes:


This is not good news! IIRC we have been here before and has only
resulted in LNB and dish deficiencies being identified, rather than
adjacent transponder issues. I do hope not, but am not holding my breath!

James

Re: Signal

David J Taylor
 

From: George Sz

I can confirm the signal drop as well.
=======================

George,

Please report this to EUMETSAT.

Thanks,
David
--
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: Signal

George Sz
 

I can confirm the signal drop as well.

Re: Signal

James Brown
 

On 13/09/2019 17:13, David J Taylor via Groups.Io wrote:
I am currently seeing a big drop in the basic signal at the moment in
what is sunny conditions. This year the signal levels have been
disappointing with a general drop of about 0.4/0.5 SNR and at the moment
it is double that.

My dish and LNB have been checked and are fine.

Regards
Ian.
====================================

It seems to be the same across Europe:

 https://www.satsignal.eu/mrtg/performance_eumetcast-europe_link_margin.php

Best to report this to EUMETSAT.

I see that the H polarisation (cyan) has dropped compared to the vertical (red) between September 02 and today, and that there is a new lower level and narrower bandwidth signal on the H polarisation around 11320 MHz. Vertical polarisation has gained a signal on ~11425 MHz.  I am not saying these changes have caused the drop, but they may be related.

These plots with a TBS5925 and CrazyCat's CrazyScan program fed from a spare feed on the 4-output LNB.  Ignore the apparent tilt across the passband, and the dB scale.

Cheers,
David
This is not good news! IIRC we have been here before and has only resulted in LNB and dish deficiencies being identified, rather than adjacent transponder issues. I do hope not, but am not holding my breath!

James

Re: Signal

David J Taylor
 

I am currently seeing a big drop in the basic signal at the moment in
what is sunny conditions. This year the signal levels have been
disappointing with a general drop of about 0.4/0.5 SNR and at the moment
it is double that.

My dish and LNB have been checked and are fine.

Regards
Ian.
====================================

It seems to be the same across Europe:

https://www.satsignal.eu/mrtg/performance_eumetcast-europe_link_margin.php

Best to report this to EUMETSAT.

I see that the H polarisation (cyan) has dropped compared to the vertical (red) between September 02 and today, and that there is a new lower level and narrower bandwidth signal on the H polarisation around 11320 MHz. Vertical polarisation has gained a signal on ~11425 MHz. I am not saying these changes have caused the drop, but they may be related.

These plots with a TBS5925 and CrazyCat's CrazyScan program fed from a spare feed on the 4-output LNB. Ignore the apparent tilt across the passband, and the dB scale.

Cheers,
David
--
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: Signal

Hartmut Schulla
 

Dual Link Margin Drop:

day

Regards

Hartmut

 

Re: Signal

Hartmut Schulla
 

Yeah! Same here:

day

Drop at 11:30 UTC from 14.9db to 13.8db

Regards

Hartmut

 

Von: MSG-1@groups.io [mailto:MSG-1@groups.io] Im Auftrag von geojohnt via Groups.Io
Gesendet: Freitag, 13. September 2019 17:09
An: MSG-1@groups.io
Betreff: Re: [MSG-1] Signal

 

Hello Ian,

 

Yes, same here (SW London) - way down on what it should be.

and again clear sunny skies and 'hot!'

 

I thought it might have been some tall flowers growing in front of my dish, which keep growing - but obviously not.

 

Regards,

John.

 

++++++++++++++++++++++++++

 

 

In a message dated 13/09/2019 14:43:01 GMT Standard Time, iandeans142@... writes:

 

I am currently seeing a big drop in the basic signal at the moment in

what is sunny conditions. This year the signal levels have been

disappointing with a general drop of about 0.4/0.5 SNR and at the moment

it is double that.

 

My dish and LNB have been checked and are fine.

Re: Signal

Ian Deans
 

On 13/09/2019 16:09, geojohnt via Groups.Io wrote:
Hello Ian,
Yes, same here (SW London) - way down on what it should be.
and again clear sunny skies and 'hot!'
I thought it might have been some tall flowers growing in front of my dish, which keep growing - but obviously not.
Regards,
John.
=======================================================

Thanks for the confirmation John. The signal has been down for a few hours now. My HVS-2 signal is actually 0.2 SNR higher at the moment than my basic signal. It is usually about 0.4 SNR lower.

Regards
Ian.

Re: Signal

martin Handl
 

from czech any problem booth transponder work

Hello Ian,

Yes, same here (SW London) - way down on what it should be.
and again clear sunny skies and 'hot!'

I thought it might have been some tall flowers growing in front of my dish, which keep growing - but obviously not.

Regards,
John.

++++++++++++++++++++++++++


In a message dated 13/09/2019 14:43:01 GMT Standard Time, iandeans142@... writes:

I am currently seeing a big drop in the basic signal at the moment in
what is sunny conditions. This year the signal levels have been
disappointing with a general drop of about 0.4/0.5 SNR and at the moment
it is double that.

My dish and LNB have been checked and are fine.

Re: Signal

geojohnt@...
 

Hello Ian,

Yes, same here (SW London) - way down on what it should be.
and again clear sunny skies and 'hot!'

I thought it might have been some tall flowers growing in front of my dish, which keep growing - but obviously not.

Regards,
John.

++++++++++++++++++++++++++


In a message dated 13/09/2019 14:43:01 GMT Standard Time, iandeans142@... writes:

I am currently seeing a big drop in the basic signal at the moment in
what is sunny conditions. This year the signal levels have been
disappointing with a general drop of about 0.4/0.5 SNR and at the moment
it is double that.

My dish and LNB have been checked and are fine.

Signal

Ian Deans
 

I am currently seeing a big drop in the basic signal at the moment in what is sunny conditions. This year the signal levels have been disappointing with a general drop of about 0.4/0.5 SNR and at the moment it is double that.

My dish and LNB have been checked and are fine.

Regards
Ian.

E1H-TPG-2

martin Handl
 

hello all..

working E1H-TPG-2 Himawari-8 and E1H-TPG-3 Goes-17 channel ??
dont receive data prex tree days minimal...
         

Re: LNB to receive hvs1 and hvs2 simultaneously and SR1 enable 2nd RX input

martin Handl
 

On Sat, Sep 7, 2019 at 01:22 AM, David J Taylor wrote:
Welcome to the group, Martin.

It's the quality (or SNR) which matters much more than the level, unless you have a very long cable (> 20m).

I note that instead of "0 gold 0" I have "1 root 1" on my BDADataEx instances, for both transponders. I can't use the TBS IP Tool as it crashes my system.

What exactly is your problem?

yes quality is important over SNR...but very important is continue BER 0...
my cable leght over 25m,dish 110/90 in H-H motor,but all work without problem...
TBS5925 is first TBS CCM USB tuner,have some bugs (very warm, low sensitivity, sometimes freezes) but has a tuner and can be used without problems for BASIC and HVS-1..for HVS-2 already looks sometimes ... TBS5927 is doing better, does not heat at all, is about 20db more sensitive, but has only input ..

for layes scramble ...if use ROOT 1 dont work for me (no lock signal) i use more year only GOLD 0
TBSdata Service sw if good for indicate how PIN active in strenam,but mean when BDAdataEx is stable

Re: LNB to receive hvs1 and hvs2 simultaneously and SR1 enable 2nd RX input

David J Taylor
 

From: martin Handl

Subject: Re: [MSG-1] LNB to receive hvs1 and hvs2 simultaneously and SR1 enable 2nd RX input

i am use for booth receive tvo TBS tunner..one TBS5925 and one TBS5927
TBS5927 is better have more sesitivity over TBS5925,but TBS5925 have output
======================

Welcome to the group, Martin.

It's the quality (or SNR) which matters much more than the level, unless you have a very long cable (> 20m).

I note that instead of "0 gold 0" I have "1 root 1" on my BDADataEx instances, for both transponders. I can't use the TBS IP Tool as it crashes my system.

What exactly is your problem?

Cheers,
David
--
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: LNB to receive hvs1 and hvs2 simultaneously and SR1 enable 2nd RX input

martin Handl
 

i am use for booth receive tvo TBS tunner..one TBS5925 and one TBS5927
TBS5927 is better have more sesitivity over TBS5925,but TBS5925 have output

Re: Tbs 5925 - Problem with modcode For HVS-1

David J Taylor
 

Hi everyone, My name is Samuele. I'm from italy... My english speaking is very bad, i hope you understanding my problem: last year, with my old PC (updated from windows 8.1 to windows 10 two years ago) I correctly received satellite data from the 8PSK (bas) and 16APSK (hvs-1) modcodes. Unfortunately, a few months later the motherboard died and I had to change computers. I have reinstalled all the software following the procedures and the indications of Eumetsat but nowadays I only receive the data from the modcode 8psk while from 16apsk the quality is always at 0 In this time frame I have only changed computers, the satellite dish has not been moved. As a receiver I have a TBS5925 and the data is processed by BDADataEx version 1.1.4.9. Do any of you have a solution to my problem? Are there other people like me who already happened? Thanks in advance for your reply.

Samuele
=======================================

Welcome to the group, Samuele! Sorry to hear of your problems.

I have some notes on MODCOD settings here, which may help:

https://www.satsignal.eu/wxsat/Ayecka/Next-steps.html#modcod

but they are for the Ayecka SR1 receiver.

For the TBS/BDADataEx program, on the MPE Filter tab, set the Multicast PID to 8192 to get both BS and HVS-1 data. Click "Apply Settings".

I hope that helps.

Ciao,
David
--
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Tbs 5925 - Problem with modcode For HVS-1

samu120497@...
 

Hi everyone, My name is Samuele. I'm from italy... My english speaking is very bad, i hope you understanding my problem: last year, with my old PC (updated from windows 8.1 to windows 10 two years ago) I correctly received satellite data from the 8PSK (bas) and 16APSK (hvs-1) modcodes. Unfortunately, a few months later the motherboard died and I had to change computers. I have reinstalled all the software following the procedures and the indications of Eumetsat but nowadays I only receive the data from the modcode 8psk while from 16apsk the quality is always at 0. In this time frame I have only changed computers, the satellite dish has not been moved. As a receiver I have a TBS5925 and the data is processed by BDADataEx version 1.1.4.9. Do any of you have a solution to my problem? Are there other people like me who already happened? Thanks in advance for your reply.

Samuele

Re: EUMETCASTView - Blue lines

Hugo
 

Hello,

The website http://hvanruys.github.io is maybe a bit outdated, but if you should read "VIIRS images" and "Making projections" you should have a better idea how EUMETastView works.
The second image you send is the raw image. It needs to be projected. This process will remove the blue lines.
Hope this helps.

Kind regards,
Hugo