Polarisation puzzle

Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
Hello everyone, I have a TM Nano SEM2Plus receiver an 80cm dish and a universal LNB set to receive HellaSat 3/4, however I have noticed that some TP frequencies are only 'seen' when the polarisation is changed, e.d 12441V DVB-S2 23666 2/3 8PSK, will only show strong S/N 90% and AGC 89% when I manually change from V to H.
Also because of this I am unable to see any channels on automatic scan. Can anyone offer an explanation please.
Thanks
 
LeBelge

LeBelge

Member
Messages
63
My Satellite Setup
2x Triax TD 110, Edision OS Mio 4K, Edision Primo, Vu+ Zero
My Location
Belguim
You don't need an automatic scan.
What you need, is a receiver in which you can enter BISS keys for ERT1, 2 & Sport HD on 12224 H
There are Greek channels in BISS on 3°East too.
 
Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
You don't need an automatic scan.
What you need, is a receiver in which you can enter BISS keys for ERT1, 2 & Sport HD on 12224 H
There are Greek channels in BISS on 3°East too.
Thank you for the reply, my question is about polarisation, why do I need to change polarisation in order to receive the channels I referred to in previous post. BISS key??
 
A

a33

Specialised Contributor
Messages
543
My Satellite Setup
XSAT410
Rebox RE-9000
My Location
NL
So, this topic is a follow-up on your posts here: Hellassat 4 begin first transmissions - SatsUK
(It's better to have more info, to get the 'total picture'! Please always link to posts/threads where you also described your situation.)

I have noticed that some TP frequencies are only 'seen' when the polarisation is changed, e.d 12441V DVB-S2 23666 2/3 8PSK, will only show strong S/N 90% and AGC 89% when I manually change from V to H.
Strange phenomenon.
A few questions:
- You say "some TP frequencies". What happens when you change H/V at other frequencies?
- Has this been a setup that worked OK, previously? Or has something been altered?

I'm thinking of maybe some wrong setting in the LNB menu, or maybe LNB skewed clockwise instead of counterclockwise (when looking from behind the dish).
Photos of those two might be helpfull?

Greetz,
A33
 
Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
So, this topic is a follow-up on your posts here: Hellassat 4 begin first transmissions - SatsUK
(It's better to have more info, to get the 'total picture'! Please always link to posts/threads where you also described your situation.)



Strange phenomenon.
A few questions:
- You say "some TP frequencies". What happens when you change H/V at other frequencies?
- Has this been a setup that worked OK, previously? Or has something been altered?

I'm thinking of maybe some wrong setting in the LNB menu, or maybe LNB skewed clockwise instead of counterclockwise (when looking from behind the dish).
Photos of those two might be helpfull?

Greetz,
A33
Hi, it is very interesting that you should mention LNB skew angles as such, this did occur to me but did not pursue it further, just been outside to take a look at the LNB, which was recently installed (professionally) as old one was dead after 20+ years. The thing is that the LNB is approx. in the opposite skew position of the original one.! So what does that tell you?. In addition I have gone back and checked on all the TP frequencies which are tuned into the receiver successfully, and they only work correctly if the polarisation is opposite to the indicated one. Therefore where do we go from here, and does it matter, in practical terms?.
 
A

a33

Specialised Contributor
Messages
543
My Satellite Setup
XSAT410
Rebox RE-9000
My Location
NL
90 degrees wrong skew is practically no problem, but annoying to your transponder list, and very annoying to scanning with 'network search' ON or with pre-made channel lists.
So a professional should correct that, at the LNB, if he/she mounted it incorrectly.

But I'm not sure about the testing results with another receiver that you wrote about in your earlier posts? Did you get the same results as with this receiver?

Greetz,
A33
 
LeBelge

LeBelge

Member
Messages
63
My Satellite Setup
2x Triax TD 110, Edision OS Mio 4K, Edision Primo, Vu+ Zero
My Location
Belguim
BISS key??
F 02580672 00 xxxxxx33xxxxxx33 - SKAI

F 02580672 01 xxxxxx33xxxxxx33 - SKAI

where x is a number
google is you friend
 
Lazarus

Lazarus

Tout Rond Bon Oeuf
Staff member
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25,593
My Satellite Setup
80cm Motorised.
Several small Dishes.
Much else.
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Mod. Note

That pushes very hard at the limits of interpretation of our Forum Rules regarding the soliciting or provision of keys.

No more, please :rolleyes:
 
Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
90 degrees wrong skew is practically no problem, but annoying to your transponder list, and very annoying to scanning with 'network search' ON or with pre-made channel lists.
So a professional should correct that, at the LNB, if he/she mounted it incorrectly.

But I'm not sure about the testing results with another receiver that you wrote about in your earlier posts? Did you get the same results as with this receiver?

Greetz,
A33
Thank you for the reply, so I could live with this until I get time to remedy, I will recheck findings with another receiver as I now have doubts over reported results and post back.
Thanks
 
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Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
Mod. Note

That pushes very hard at the limits of interpretation of our Forum Rules regarding the soliciting or provision of keys.

No more, please :rolleyes:
Thank you for that I will not be using any BISS keys at all.
 
A

a33

Specialised Contributor
Messages
543
My Satellite Setup
XSAT410
Rebox RE-9000
My Location
NL
Thank you for the reply, so I could live with this until I get time to remedy, I will recheck findings with another receiver as I now have doubts over reported results and post back.
OK,
If you want to reclaim at your professional installer, don't wait too long!

greetz,
A33
 
Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
OK,
If you want to reclaim at your professional installer, don't wait too long!

greetz,
A33
Just rechecked with new receiver and as I suspected I was wrong earlier the results are exactly as per TM Nano or polarisation is reversed so skew angle is 90 deg out will sort out.
Thanks
 
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william-1

william-1

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Epping Forest
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OP Gibertini 100 XP+ Inverto Black Ultra 0.2
Superior Dark Motor (160° max)
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Edision Primo IP S2 (A/B switch) TM5502HD

Raven 88cm Mesh Dish +TM-0.1
Stab100 H to H (120° max)
(53 east to 45 west)
Octagon SX88+ (A/B switch), TM-F3/5

45cm dish Golden Interstar Alpha X 28E
My Location
Epping Forest Essex
What sort of horse did the professional installer ride ? :-rofl2
 
Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
What sort of horse did the professional installer ride ? :-rofl2
You may well ask the guy was pleasant enough but was in a hurry to go elsewhere I had to remind him to ensure that he used tape to cover the f connector up to avoid water getting in!!!!, at least I know what the problem is. Thanks to everyone.
 
william-1

william-1

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Messages
8,771
Location
Epping Forest
My Satellite Setup
OP Gibertini 100 XP+ Inverto Black Ultra 0.2
Superior Dark Motor (160° max)
(50 east to 45 west)
Edision Primo IP S2 (A/B switch) TM5502HD

Raven 88cm Mesh Dish +TM-0.1
Stab100 H to H (120° max)
(53 east to 45 west)
Octagon SX88+ (A/B switch), TM-F3/5

45cm dish Golden Interstar Alpha X 28E
My Location
Epping Forest Essex
I hope he used self amalgamating tape ? & not PVC tape :rolleyes:
 
jeallen01

jeallen01

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Somewhere in England (possibly?)!
I hope he used self amalgamating tape ? & not PVC tape :rolleyes:
Whilst s/a tape is pretty good, it can be tricky to get completely around the connectors on the bottoms of LNB's (or, worse, twins or quads/quatros) or, especially, DiSEqC motors (not that the latter seems to be case in Zappas204's case) when you have big hands like me! BTW, cold weather makes s/a tape more difficult to bond & seal - experience!:-doh.

In such situations, spray-on "liquid rubber tape" (check your usual search engine) is invaluable - had to use that today to seal the connectors on the 2x Alsat motors when I refitted the cables after I removed the temporary cross-over cables installed a few months ago to ensure I could get access to the 1.2m Gibby from both the "office" and the lounge via a Smart Priority Switch (Great "gadget"!).
Edited: PS: even with a rubber boot over a connector, an overspray with liquid rubber tape could help in the longer term.
 
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Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
Whilst s/a tape is pretty good, it can be tricky to get completely around the connectors on the bottoms of LNB's or, especially, DiSEqC motors (not that the latter seems to be case in Zappas204's case) when you have big hands like me!

In such situations, spray-on "liquid rubber tape" (check your usual search engine) is invaluable - had to use that today to seal the connectors on the 2x Alsat motors when I refitted the cables after I removed the temporary cross-over cables installed a few months ago to ensure I could get access to the 1.2m Gibby from both the "office" and the lounge via a Smart Priority Switch (Great "gadget"!).
Thank you, I recall the new LNB had an rubber boot included in the pack as to wheather the guy used it or not I will take a look and see when I get a moment, as well as check on the general security etc of the connections.
 
Zappas204

Zappas204

Member
Messages
51
My Satellite Setup
TechniSat Digit Cl 2 receiver , 80cm dish, universal single LNB
My Location
UK
I hope he used self amalgamating tape ? & not PVC tape :rolleyes:
I would hope so but will check to make certain, and then I will call him to sort things out.!
 
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