Horizontal Nightmare

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#1
Hi,

I have a dual feed monoblock LNB located on a rooftop (Astra and Hotbird), almost impossible to reach. My receiver is a Manhattan DSR 5500. Initially the system was working great, all trasponders with good signal. After a while Horizontal trasponders started progressively to loose signal strenght and some disappeared. Yesterday the final hit and just two H frequencies are still available (altough with a very poor signal). My DSR has the un-famous chip problem where the channel list gets corrupted. All the V frequencies have a very good strength. Now I was wondering if this is a dish pointing, LNB or receiver problem. To make the headache even worst I do not know anyone that has another receiver I can test with! Anyone any suggestion?

Many thanks!
 

rolfw

Believe it when I see it Admin.
Staff member
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My Satellite Setup
Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
#2
It could well be an alignment problem, but you're not going to find that out without the use of another receiver or putting a meter on the LNB. If you know someone with a Sky digibox, you can test with that, all you ned to do is add the relevant frequencies and polarities in the manual tuning menu.
 
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#3
Thanks! That may make my task easier then. If not I will have to beg one shop to let me test the receiver!

Many thanks!
 

jimbo

Specialist Contributor
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My Satellite Setup
Sky HD, TM6800HD, Manhattan Plaza ST550 and TM1500 CI+. 1.0m dish and 36v motor, Panasonic DVD HDD recorder and Panasonic video/DVD recorder. Sony G800 HD TV stand/surround system + Sony KDL40W2000. Infinity USB, Elvis, CAS1, CAS2.
My Location
Greater London
#4
There was a dip on a couple of hotbird transponders yesterday and (I think) it was H polarity. Back ok now though.
 

AdinHH

Regular Member
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#5
It sounds like your dish is moving (maybe because of recent high winds?) so it would be an alignment problem.
The other possibility is an LNB problem (not switching polarities between V & H and/or not responding to High/Low band switching tone).
At the moment, my bet is on dish alignment due to wind (of the weather variety).
 
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#6
Thanks! AdinHH, you lost the bet :D It was the LNB who went. Was a humax monoblock with twin output. The horizontal polarity was gone in both outputs. I must say that one out was without cable so maybe some water got in. Also it's strange that as I said the horizontal decreased over time and died definitely after those big storms... Maybe some of you will know why, I can only hope it won't happen again!

Thanks
 
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