Forum > Decoders > Installation > explora 2 signal and user bands help
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  #31  
Old 2017-06-14 , 10:29
idm1 idm1 is offline
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Thanks will do.
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  #32  
Old 2017-06-15 , 06:32
idm1 idm1 is offline
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Please will someone explain as to why my neighbors and surrounding dishes are pointed slightly to the right of what mine is? My signal is as mentioned, almost ideal and I have checked on the dish pointer web site, it looks like the angle of my dish is right and the others are not.
The same applies to a friend of mine, I changed his dish and his neighbor at the same time did the same but was done by an accredited installer, however my setup seems to look to the left of it.

As mentioned, I did check on the dish pointer web site also comparing the angles between IS-20 and IS-10.
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  #33  
Old 2017-06-15 , 07:23
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Optimist Optimist is offline
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Geoff's recipe will clear up any mystery for you.
I'm not going to hazard any guess as to what the discrepancy may be. Except to point out that the side-lobes we referred to earlier is the result of such small(?) differences and will cause much confusion with readings, and that IS10 is not involved with the service (although why you're looking at that is not clear) - we only use IS20 & IS36 for the service and they're located in the same geostationary position.

I'll be away so will have to leave my contribution there, all the best with it :-)
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  #34  
Old 2017-06-15 , 09:10
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Back one more time as I've just realised that the confusion may be this simple oversight many make? The directions involved suggest it

http://www.urban-astronomer.com/astr...agnetic-north/
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  #35  
Old 2017-06-19 , 12:14
Geoff D Geoff D is offline
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Assuming that everyone knows the difference between True North and Magnetic North and have taken this into account for the locations involved, ALL antennas MUST be pointed in the same direction for locations very close together. (like your neighbours). IF there is a difference it is because some antennas have been peaked on a side lobe and not on the main lobe. (This is a mistake I find at many installations done by so-called accredited installers who are just too lazy to ensure they have the main lobe located before they optimize signal levels.

Then the values you should be using are for IS 20/IS36 and IS10, NOT for IS 10, as IS 10 is no longer at the position it was originally. It has been moved to make room for the other satellites.

Lastly, Magnetic compass readings are notoriously difficult to use because the values are affected by the steel work close to the compass. Even different bracket designs will give different values1
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  #36  
Old 2017-06-20 , 06:31
idm1 idm1 is offline
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Quote:
Originally Posted by Geoff D View Post
......to ensure they have the main lobe located before they optimize signal levels.
Thank you that makes more sense, how would one determine the main lobe from the side lobes?
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  #37  
Old 2017-06-20 , 09:03
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It's really been unfortunate timing for you - Geoff can't be here much at the moment, so...

Normally only really possible by making known to be certain calculations, or properly using a professional FSM (Field Strength Meter).
I really can't offer more, Geoff usually handles all of these enquiries so I'm not up to speed with his methods which have been long fine tuned.

EDIT: Probably your best bet is to first test your Explora at a friend etc. who's setup is known to be good and producing reliable levels on an Explora (other decoders are less sensitive).

Last edited by Optimist; 2017-06-20 at 09:47. .
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  #38  
Old 2017-06-21 , 17:47
idm1 idm1 is offline
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Another update, I have now mounted and aligned (not fine) my 1,2 meter dish and already a fat improvement. Strength fluctuates between no less than 96 to max 100% quality remains a constant 100%, tuner 3 has come up to 86~90 strength and 85~87 quality.
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  #39  
Old 2017-06-22 , 06:47
idm1 idm1 is offline
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For anyone who wants to know what side lobes are here is a short video to help understand: https://www.youtube.com/watch?v=PPoV10GWWOQ .

Last edited by idm1; 2017-06-23 at 08:58. . Reason: Incorrect information that is ridiculed
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  #40  
Old 2017-06-22 , 08:08
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The LNB points at the dish, there are sometimes none of the desired straight angles involved re its opposite direction. The certain known way to look at the LOS (Line Of Sight) is to look along the dish's LNB support arm - usable accuracy is unlikely.
Wherever you came across this idea that IS20 is visible like a brightest star, highly doubtful (to any usable degree) considering its size and distance and not something I would ever try rely on. Best to stick to what's already been suggested by those involved here.

Last edited by Optimist; 2017-06-22 at 10:01. . Reason: Clarity re LNB
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