Es Hail 2 LNB Antidrift
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Klaus Hutschenreuther <klaus.hutschenreuther@...>
Hi,
You can take a look at the following:
https://loetlabor-jena.de/doku.php?id=projekte:3cmplllnb:start
http://www.dg0opk.darc.de/Octagon_LNB_mod_March2017.html
Klaus Hutschenreuther
Von: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] Im Auftrag von Simon Brown
Hi,
The answer is no. I’ll be on Es’Hail 2 myself, so will look at the LNB issue once I have a dish and LNB organised. There will be some Doppler even though Es’Hail 2 is a GEO satellite.
As soon as Es’Hail 2 has been commissioned I’ll get a dish ordered and look at this issue.
Simon Brown, G4ELI
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of floroy42@...
Hello OMs,
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floroy42@...
Nice modification Matthias,
i'm a little bit jealus of your big dish and feed system ;) My solution points to those "lazy" OMs which want to use a unmodified "stock" PLL LNB and let the software handle the drift problem. Ham Radio is experimantal and anyone can choose what approach he will take. VY73 DB8TF
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Mr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ? DL3YC modification, LNB fully locked on GPS. https://www.loetlabor-jena.de/doku.php?id=projekte:3cmplllnb:start Obtenez Outlook pour iOS
De : main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...> Envoyé : jeudi, décembre 27, 2018 7:41 PM À : main@sdr-radio.groups.io Objet : Re: [SDR-Radio] Es Hail 2 LNB Antidrift Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von Mr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Matthias Bopp
Hi Laurant,
this is the complete frequency response when tranmitting with a horn antenna maybe 2m away and measuring the IF output.
Thus it includes the frequency response of the horn (high pass), preamplifiers with filter, mixer and IF chain.
I have not measured the individual parts like the frequency response of the waveguide in the horn which might be a problem indeed.
However this would not be addressed by any of the modifications which were discussed in this thread anyway.
Kind regards
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Im Auftrag von Mr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
Obtenez Outlook pour iOS De :
main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:
main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von
Mr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Mr VILLAIN Laurent
"There will be some Doppler even though Es’Hail 2 is a GEO satellite " => could you explain it ???
73 Laurent. Obtenez Outlook pour iOS
De : main@sdr-radio.groups.io de la part de Klaus Hutschenreuther <klaus.hutschenreuther@...> Envoyé : jeudi, décembre 27, 2018 7:46 PM À : main@sdr-radio.groups.io Objet : Re: [SDR-Radio] Es Hail 2 LNB Antidrift Hi,
You can take a look at the following:
https://loetlabor-jena.de/doku.php?id=projekte:3cmplllnb:start
http://www.dg0opk.darc.de/Octagon_LNB_mod_March2017.html
Klaus Hutschenreuther
Von: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] Im Auftrag von Simon Brown
Hi,
The answer is no. I’ll be on Es’Hail 2 myself, so will look at the LNB issue once I have a dish and LNB organised. There will be some Doppler even though Es’Hail 2 is a GEO satellite.
As soon as Es’Hail 2 has been commissioned I’ll get a dish ordered and look at this issue.
Simon Brown, G4ELI
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of floroy42@...
Hello OMs, Attachments:
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Matthias Bopp
Hi Laurant,
I am presently modifying another LNB and will lock it to a GSPDO or Rubidum (both are available here).
What I do not understand in the approach from Loetlabor Jena is why they still stick to the 27 MHz reference.
I have 10 MHz to 26,03076923 MHz PLL converter built by DF9NP for me which I will use.
This moves the IF band higher and normal SAT-RX can be used and also most SDRs for narrowband.
Best regards
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Im Auftrag von Mr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
Obtenez Outlook pour iOS De :
main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:
main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von
Mr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Mr VILLAIN Laurent
Matthias, The 27 MHz is locked on the GPS signal ( VCTCXO ) and re-injected to replace the 27 MHz crystal, only re-injected on one pin of PLL chip. 73 Laurent. Obtenez Outlook pour iOS
De : main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...> Envoyé : jeudi, décembre 27, 2018 8:01 PM À : main@sdr-radio.groups.io Objet : Re: [SDR-Radio] Es Hail 2 LNB Antidrift Hi Laurant,
I am presently modifying another LNB and will lock it to a GSPDO or Rubidum (both are available here).
What I do not understand in the approach from Loetlabor Jena is why they still stick to the 27 MHz reference.
I have 10 MHz to 26,03076923 MHz PLL converter built by DF9NP for me which I will use.
This moves the IF band higher and normal SAT-RX can be used and also most SDRs for narrowband.
Best regards
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von Mr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag vonMr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Mr VILLAIN Laurent
26,03 MHz not sure if the PLL chip will lock on it or not. Its far from the original 27 MHz, must be tested to know. I have tested some PLL chip, normally 25 MHz, they lock from 24,2 MHz up to 25,2 MHz, no more ... Laurent.
Obtenez Outlook pour iOS
De : main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...> Envoyé : jeudi, décembre 27, 2018 8:04 PM À : main@sdr-radio.groups.io; main@sdr-radio.groups.io Objet : Re: [SDR-Radio] Es Hail 2 LNB Antidrift Matthias, The 27 MHz is locked on the GPS signal ( VCTCXO ) and re-injected to replace the 27 MHz crystal, only re-injected on one pin of PLL chip. 73 Laurent. Obtenez Outlook pour iOS De : main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...> Envoyé : jeudi, décembre 27, 2018 8:01 PM À : main@sdr-radio.groups.io Objet : Re: [SDR-Radio] Es Hail 2 LNB Antidrift Hi Laurant,
I am presently modifying another LNB and will lock it to a GSPDO or Rubidum (both are available here).
What I do not understand in the approach from Loetlabor Jena is why they still stick to the 27 MHz reference.
I have 10 MHz to 26,03076923 MHz PLL converter built by DF9NP for me which I will use.
This moves the IF band higher and normal SAT-RX can be used and also most SDRs for narrowband.
Best regards
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von Mr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag vonMr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Matthias Bopp
Hi Laurent,
as you could see from my description the Octagon LNB can be modified from a 27 MHz reference to a 26 MHz.
As it locked to the 26 MHz TCXO also locking it to the 26,03076923 MHz should be no problem.
I have not tried how much lower the reference can be but 26 MHz is no problem. I have made comparisons of the LO spectrum before and after the modification and measured no difference. I will add those measurement results to the description when I get back home (I am presently at my 2nd QTH).
Of course with other LNBs that might be different.
Kind regards
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Im Auftrag von Mr VILLAIN Laurent
26,03 MHz not sure if the PLL chip will lock on it or not.
Its far from the original 27 MHz, must be tested to know.
I have tested some PLL chip, normally 25 MHz, they lock from 24,2 MHz up to 25,2 MHz, no more ...
Laurent.
Obtenez Outlook pour iOS De :
main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
Matthias,
The 27 MHz is locked on the GPS signal ( VCTCXO ) and re-injected to replace the 27 MHz crystal, only re-injected on one pin of PLL chip.
73 Laurent.
Obtenez Outlook pour iOS De :
main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
I am presently modifying another LNB and will lock it to a GSPDO or Rubidum (both are available here).
What I do not understand in the approach from Loetlabor Jena is why they still stick to the 27 MHz reference.
I have 10 MHz to 26,03076923 MHz PLL converter built by DF9NP for me which I will use.
This moves the IF band higher and normal SAT-RX can be used and also most SDRs for narrowband.
Best regards
Matthias
Von:
main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von
Mr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im
Auftrag vonMr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Mr VILLAIN Laurent
Yes please share. You are very stable and frequency drifted, the best of the best ;))))) Laurent.
Obtenez Outlook pour iOS
De : main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...> Envoyé : jeudi, décembre 27, 2018 8:27 PM À : main@sdr-radio.groups.io Objet : Re: [SDR-Radio] Es Hail 2 LNB Antidrift Hi Laurent,
as you could see from my description the Octagon LNB can be modified from a 27 MHz reference to a 26 MHz.
As it locked to the 26 MHz TCXO also locking it to the 26,03076923 MHz should be no problem.
I have not tried how much lower the reference can be but 26 MHz is no problem. I have made comparisons of the LO spectrum before and after the modification and measured no difference. I will add those measurement results to the description when I get back home (I am presently at my 2nd QTH).
Of course with other LNBs that might be different.
Kind regards
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von Mr VILLAIN Laurent
26,03 MHz not sure if the PLL chip will lock on it or not.
Its far from the original 27 MHz, must be tested to know.
I have tested some PLL chip, normally 25 MHz, they lock from 24,2 MHz up to 25,2 MHz, no more ...
Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
Matthias,
The 27 MHz is locked on the GPS signal ( VCTCXO ) and re-injected to replace the 27 MHz crystal, only re-injected on one pin of PLL chip.
73 Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
I am presently modifying another LNB and will lock it to a GSPDO or Rubidum (both are available here).
What I do not understand in the approach from Loetlabor Jena is why they still stick to the 27 MHz reference.
I have 10 MHz to 26,03076923 MHz PLL converter built by DF9NP for me which I will use.
This moves the IF band higher and normal SAT-RX can be used and also most SDRs for narrowband.
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag vonMr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag vonMr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Matthias Bopp
Hi Laurant,
I understand but when already building an external reference circuit to generate the 27 MHz why not chose another reference to move the IF higher and have higher overall gain. Also if you move the IF beyond 950 MHz you can use common DVB-S2 receivers. The effort is basically the same.
At the same time you can have an addition feature: if you chose for instance 26,03076923 MHz you get a LO frequency of 9400 MHz. Thus you can tune your receiver easily as the last digits of your tuned frequency are the same: for instance RF=10489,952 MHz will result in an IF=1089,952 MHz.
That might be only useful with analogue receivers as with SDRs you can typically adjust the frequency offset easily.
Anyhow, there are apparently many ways to Rome …
Have a nice day
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Im Auftrag von Mr VILLAIN Laurent
Matthias,
The 27 MHz is locked on the GPS signal ( VCTCXO ) and re-injected to replace the 27 MHz crystal, only re-injected on one pin of PLL chip.
73 Laurent.
Obtenez Outlook pour iOS De :
main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
I am presently modifying another LNB and will lock it to a GSPDO or Rubidum (both are available here).
What I do not understand in the approach from Loetlabor Jena is why they still stick to the 27 MHz reference.
I have 10 MHz to 26,03076923 MHz PLL converter built by DF9NP for me which I will use.
This moves the IF band higher and normal SAT-RX can be used and also most SDRs for narrowband.
Best regards
Matthias
Von:
main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von
Mr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im
Auftrag vonMr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Mr VILLAIN Laurent
De : main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...> Envoyé : jeudi, décembre 27, 2018 8:39 PM À : main@sdr-radio.groups.io Objet : Re: [SDR-Radio] Es Hail 2 LNB Antidrift Hi Laurant,
I understand but when already building an external reference circuit to generate the 27 MHz why not chose another reference to move the IF higher and have higher overall gain. Also if you move the IF beyond 950 MHz you can use common DVB-S2 receivers. The effort is basically the same.
At the same time you can have an addition feature: if you chose for instance 26,03076923 MHz you get a LO frequency of 9400 MHz. Thus you can tune your receiver easily as the last digits of your tuned frequency are the same: for instance RF=10489,952 MHz will result in an IF=1089,952 MHz.
That might be only useful with analogue receivers as with SDRs you can typically adjust the frequency offset easily.
Anyhow, there are apparently many ways to Rome …
Have a nice day
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von Mr VILLAIN Laurent
Matthias,
The 27 MHz is locked on the GPS signal ( VCTCXO ) and re-injected to replace the 27 MHz crystal, only re-injected on one pin of PLL chip.
73 Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
I am presently modifying another LNB and will lock it to a GSPDO or Rubidum (both are available here).
What I do not understand in the approach from Loetlabor Jena is why they still stick to the 27 MHz reference.
I have 10 MHz to 26,03076923 MHz PLL converter built by DF9NP for me which I will use.
This moves the IF band higher and normal SAT-RX can be used and also most SDRs for narrowband.
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag vonMr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag vonMr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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Tarquin Roode
Hi
I worked at a satellite earth station, we used mostly Intelsat satellites for the services I worked on, we used 30 meter dishes… There is Doppler, Geostationary is not stationary! Earth is not stationary.
That being said the Doppler was insignificant for us. But useful for some of the experimental trackers that did some experiments, but monopole was simpler, we just used step track..yes we had to track the Geostaionary satellites lese the 30 meter dishes would drop signal if we didn’t point accurately enough.
Tarquin Roode ZR1TR
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Mr VILLAIN Laurent
Sent: 27 December 2018 12:32 PM To: main@sdr-radio.groups.io; main@sdr-radio.groups.io Subject: Re: [SDR-Radio] Es Hail 2 LNB Antidrift
What doppler ????? Its a GEO sat .... there is NO Doppler !!!!!
Believe it or not, GPSDO is more expensive and has slightly more drift than the sw correction = I guess a joke ?
73 Laurent. F4AAR.
Obtenez Outlook pour iOS De : main@sdr-radio.groups.io de la part de floroy42@...
I have seen some signals which where stabilized with GPSDO and they still have a little drift of a few Hz.
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Michael Durkin
Can any one mention if / when a Es’Hail 2 (Phase 4?) Geo will be over
toggle quoted messageShow quoted text
the America's ? KC7NOA
On 12/27/18, Tarquin Roode <tarquin.roode@...> wrote:
Hi
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Matthias Bopp
Hi Michael,
toggle quoted messageShow quoted text
I am afraid P4A will never cover North America as it will be positioned at 26 degree east. However AMSAT USA is working on P4B which shall cover North America. I will not be a geostationary satellite but a highly elliptical orbit. I am not aware of an updated schedule when it shall be launched. Originally it was envisioned for mid 2017. Here is some information on P4B: https://www.dd1us.de/spacesounds%202i.html I am no sure there is meanwhile newer information about P4B available. If so I will be happy to add it. Best regards Matthias www.dd1us.de -----Ursprüngliche Nachricht----- Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Im Auftrag von Michael Durkin Gesendet: Donnerstag, 27. Dezember 2018 15:51 An: main@sdr-radio.groups.io Betreff: Re: [SDR-Radio] Es Hail 2 LNB Antidrift Can any one mention if / when a Es’Hail 2 (Phase 4?) Geo will be over the America's ? KC7NOA
On 12/27/18, Tarquin Roode <tarquin.roode@...> wrote:
Hi
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Michael Durkin
That saddens me ...
toggle quoted messageShow quoted text
I was so much looking forward to a Geo Station Sat .. i have had the equipment to use it for some time now ... before my wife told me that she wants a Divorce ... I did not want to track with a 12' dish .... Some day ... I cry into the night ....
On 12/27/18, Matthias Bopp <matthias.bopp@...> wrote:
Hi Michael,
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Matthias Bopp
Michael,
toggle quoted messageShow quoted text
yes it is sad but maybe someday P4B will happen ... Best regards Matthias -----Ursprüngliche Nachricht----- Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Im Auftrag von Michael Durkin Gesendet: Donnerstag, 27. Dezember 2018 16:09 An: main@sdr-radio.groups.io Betreff: Re: [SDR-Radio] Es Hail 2 LNB Antidrift That saddens me ... I was so much looking forward to a Geo Station Sat .. i have had the equipment to use it for some time now ... before my wife told me that she wants a Divorce ... I did not want to track with a 12' dish .... Some day ... I cry into the night ....
On 12/27/18, Matthias Bopp <matthias.bopp@...> wrote:
Hi Michael,
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Klaus Hutschenreuther <klaus.hutschenreuther@...>
HI,
RX: Down-Converter AMSAT P4-A Kuhne electronic https://shop.kuhne-electronic.de/kuhne/de/shop/neu/MKU+LNC+10+OSCAR+P4A/?card=1831
MKU LNC 10 OSCAR P4-A · 1129 MHz ... 1140 MHz · Low frequency drift due to TCXO · Mountable with standard LNB peg ·
TX: Es’hail-2-Up-link 2400-MHz-RADOM-Helixantenne, 22dBi für 198€ - Voraussichtlich ab Februar 2019 Shop: www.anjo-antennen.de
Klaus Hutschenreuther
Von: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] Im Auftrag von Mr VILLAIN Laurent
De : main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
I understand but when already building an external reference circuit to generate the 27 MHz why not chose another reference to move the IF higher and have higher overall gain. Also if you move the IF beyond 950 MHz you can use common DVB-S2 receivers. The effort is basically the same.
At the same time you can have an addition feature: if you chose for instance 26,03076923 MHz you get a LO frequency of 9400 MHz. Thus you can tune your receiver easily as the last digits of your tuned frequency are the same: for instance RF=10489,952 MHz will result in an IF=1089,952 MHz.
That might be only useful with analogue receivers as with SDRs you can typically adjust the frequency offset easily.
Anyhow, there are apparently many ways to Rome …
Have a nice day
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag von Mr VILLAIN Laurent
Matthias,
The 27 MHz is locked on the GPS signal ( VCTCXO ) and re-injected to replace the 27 MHz crystal, only re-injected on one pin of PLL chip.
73 Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
I am presently modifying another LNB and will lock it to a GSPDO or Rubidum (both are available here).
What I do not understand in the approach from Loetlabor Jena is why they still stick to the 27 MHz reference.
I have 10 MHz to 26,03076923 MHz PLL converter built by DF9NP for me which I will use.
This moves the IF band higher and normal SAT-RX can be used and also most SDRs for narrowband.
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag vonMr VILLAIN Laurent
Hello Matthias 73.
Did you check RF filter response too ?
DL3YC modification, LNB fully locked on GPS.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Matthias Bopp <matthias.bopp@...>
Hi Laurant,
As you have requested here is a spectrum sweep of a unmodified dual Octagon PLL LNB. LO was 9750 Mhz.
As you can see the gain at 600 MHz drops by about 5dB (roughly).
I assume this is the frequency response of the IF chain and as the LNB has plenty of gain I don’t think it is a real problem.
It is different if the frequency response (high pass characteristic) is based on the amplifiers in front of the mixer as then total system noise figure should be impacted.
Nevertheless I changed the reference of my LNB to move the IF signals up above 1 GHz and also use a TCXO.
Here is a description of the modification I made:
https://www.dropbox.com/s/bp61phg1e2vihun/Feed%20fuer%20EsHail-2%200v3.pdf?dl=0
Best regards
Matthias
Von:main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>Im Auftrag vonMr VILLAIN Laurent
The best solution for SSB is DL3YC idea.
You could see on his blog. Its the optimal one.
In all cases your 0,5 ppm TCXO's or crystals will be under the GPS signal in all cases.
Without modification of LNB, you will lost IF gain too, if not, lets share a spectrum capture.
Warm 73, no fight, just discuss. Laurent.
ObtenezOutlook pour iOS De :main@sdr-radio.groups.io de la part de Mr VILLAIN Laurent <f4aar@...>
On Thu, Dec 27, 2018 at 7:06 PM +0900, "Matthias Bopp" <matthias.bopp@...> wrote:
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floroy42@...
Here is my actual measurement of the SW correction solution:
vy73 DB8TF
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Matthias Bopp
That looks pretty impressive, congratulations
Matthias
Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Im Auftrag von floroy42@...
Here is my actual measurement of the SW correction solution:
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