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Old 27-06-11, 01:25 PM   #1 (permalink)
A Sherlock
 
 
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Question 90% Signal. 0% Quality.

I've been trying to set up a sat dish for a friend on Astra 2E.
I've tried two dishes and two LNBs.
He bought two kits, one 80cm from B&Q and one from ??? which is an ex-Sky kit.
I think the ex-Sky kit is a no, no: cannot get any reasonable signal from any satellite using my alignment kit -- the simple kind with attenuation and analogue pointer.
With the B&Q kit I get a whacking signal from two satellites.

Normally, on the few I have done, (I am not a pro), I can get decent signal level and quality with attenuator set at +2dBu.
The B&Q kit signal I have to wind the attenuator setting back to zero and I still see almost full scale.

I have tried my own Digisat box which gives me 80% signal, 70% quality about a mile away.
The guy 50 yards away gets a good signal and quality.

I've tried rotating the LNB, (which should be 7.5 degrees. right?), aligning and re- aligning.
Checked the transponder setting(s). All to no avail. 90% signal, 0% quality.

I'm not doing something right but can't figure out what it is.
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Old 27-06-11, 02:28 PM   #2 (permalink)
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Default Re: 90% Signal. 0% Quality.

Astra 2E has not been launched yet as far as I know.


I assume you mean the Astra/Eurobird1 cluster at 28.2/28.5E ?


The skew would be set by turning it clockwise a bit, looking at the dish face, then adjust for best signal.

Why not use your own Digisat box to align the dish, since it is already tuned in and you are familiar with it.
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Old 27-06-11, 05:03 PM   #3 (permalink)
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Question Re: 90% Signal. 0% Quality.

Quote:
Originally Posted by Robbo View Post
Astra 2E has not been launched yet as far as I know.


I assume you mean the Astra/Eurobird1 cluster at 28.2/28.5E ?


The skew would be set by turning it clockwise a bit, looking at the dish face, then adjust for best signal.

Why not use your own Digisat box to align the dish, since it is already tuned in and you are familiar with it.
Yeah, sorry, Robbo. My poor syntax.
I used both Digisat boxes since his box gave a 90% signal strength with the LNB disconnected.
As you suggest I used my box to check.

The skew is about right at ca. -10 degrees though it should be -12.5 as I discovered this morning but Google advice says skew isn't that critical.

And you're correct, Astra 2D is what I've been trying for. 2E sometime in the next two years. Maybe.

I could get a strong signal from two sats about 10 degrees apart. I guess the one to the left is Astra 1 and the one to the right ( at 32E) is Astra 2?
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Old 27-06-11, 05:37 PM   #4 (permalink)
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Default Re: 90% Signal. 0% Quality.

The Astra you want is at 28.2 degrees East, Astra 1 is at 19E.

So Astra 2 is to the left and lower than Astra 1.

One way to align is to set the elevation, then whilst monitoring a valid transponder on the satellite you want slowly swing the dish from one side to the other, if nothing, raise the elevation a touch, and repeat until you get a lock. Then scan, to check which satelite it is (check the channels). If it is the wrong satellite (you can find out which one it is by checking the channels you get and their freqs), you know which way the dish has to move to get the one you wanted.


Yep, skew is not critical, as long as its in the right ballpark, you'll get a lock, once the dish is aligned as best you can, you can then twist the LNB to get the best skew setting based on receiver signal quality received.
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Old 27-06-11, 05:54 PM   #5 (permalink)
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Default Re: 90% Signal. 0% Quality.

signal strength but no quality
usually means you are on the
wrong satellite
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Old 27-06-11, 06:09 PM   #6 (permalink)
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Question Re: 90% Signal. 0% Quality.

Quote:
Originally Posted by Robbo View Post
The Astra you want is at 28.2 degrees East, Astra 1 is at 19E.

So Astra 2 is to the left and lower than Astra 1.

One way to align is to set the elevation, then whilst monitoring a valid transponder on the satellite you want slowly swing the dish from one side to the other, if nothing, raise the elevation a touch, and repeat until you get a lock. Then scan, to check which satelite it is (check the channels). If it is the wrong satellite (you can find out which one it is by checking the channels you get and their freqs), you know which way the dish has to move to get the one you wanted.


Yep, skew is not critical, as long as its in the right ballpark, you'll get a lock, once the dish is aligned as best you can, you can then twist the LNB to get the best skew setting based on receiver signal quality received.
I've been through this procedure also, Robbo.
I got my angle settings from http://fr.dishpointer.com which states I should be looking at 147.1 degrees mag.
The map provided says I was looking in the correct area for 2D where I got a very strong signal.
MyDigisat box agreed with the strength but still zero quality.
So, no channels to check.

At my home it works fine and I didn't change any settings for transponder, etc.

ABA suggests I'm on the wrong satellite but I get zilch quality from either.
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Old 27-06-11, 06:21 PM   #7 (permalink)
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Default Re: 90% Signal. 0% Quality.

Flick through all transponders see if any of then get sig quality.
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Old 27-06-11, 07:26 PM   #8 (permalink)
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Arrow Re: 90% Signal. 0% Quality.

Quote:
Originally Posted by Robbo View Post
Flick through all transponders see if any of then get sig quality.
I'll try that. But not with my Digisat box!
Might be the weekend tho'
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Old 01-07-11, 10:40 AM   #9 (permalink)
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Question Re: 90% Signal. 0% Quality.

Have tested these with LNB set to
UNIVERSAL and NORMAL.
LNB LOW FREQ 9750 5150
LNB HIGH FREQ 10600 5750

ASTRA 1H/1L/IM
HOTBIRD 6,8,9
TURKSAT 2A/3A
ASTRA/EURO1 * NOTE BELOW
EURO 2
TELSTAR_18C
TELSTAR_18Ku
APSTAR_2R Ku
CHINASAT_6B

*NOTES: at first on EURO1 I had three pay channels with exactly 42% quality.
I tried all transponders on all the satellites.

Oddly though, some transponders on CHINASAT were showing fluctuating Quality from zero to 87% but totally unstable.

When I went back to ASTRA/EURO1 later I couldn't find any channels on any transponder though the signal strength remained above 90%
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Old 04-07-11, 11:33 AM   #10 (permalink)
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Talking Re: 90% Signal. 0% Quality.

OK. It's fixed.
Two faulty LNBs
I bought a Technomate TM-1 Universal and fitted it.
Re-aligned the dish and BINGO! 99% signal. 51% quality. Ooodles of channels.

If it helps someone else
It was the whacking great signal from the faulty LNB that threw me.

Thanks for the tips, guys. Have a on me.
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