Horizontal Nightmare

Bamboccio

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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

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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.
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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.
 

Bamboccio

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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

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There was a dip on a couple of hotbird transponders yesterday and (I think) it was H polarity. Back ok now though.
 

AdinHH

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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).
 

Bamboccio

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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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