Bad Satellite Antenna

[Richard]

Hi All,

Robert, I think your question is great.

I wish: I could answer it.  When examining the LNB,
 I did not see any power wires, just the RF lines.  I have wondered, and do not understand how the LNB gets it's power.  Robert, anything you could say about this would help.

I have never had any experience with
 satellite antennas.  Last night I googled the words "satellite TV antennas" to learn something.  That is how I learned about the LNB.  Today I removed the LNB from the arm just to look it over.  I wrote down the
 numbers on it.  I also measured the antenna.  I do not know how these antennas are supposed to be measured, but across the dish horizontally I measured 18", and in the vertical direction, up and down the dish, I got
 191/2"

In looking over the LNB, I did not see any power wires or connections.  All I saw was two F type RF connectors.  One by one, each separately, I disconnected the F connectors, and examined them, then put them back.  I did not see any obvious damage.  

I tend to believe the LNB is bad due to lightening, which seemed very very close when this problem began.  I put my hands on the antenna, and it seemed solidly mounted, so I don't think it has moved, even thought the wind was strong.

The LNB has two RF lines coming out of it going to two different set-top boxes.  Both of these set top boxes say they can not "see" the satellite.  So, I think the problem is with the antenna, the LNB, the power to the LNB (I don't know how it get it's power.  Perhaps, I missed something, when I examined the LNB, as I did not fully remove it from the arm.)  Or perhaps the transmission cable from the
 antenna to
 the
 house is bad, but this seems unlikely.

Any help would be most appreciated.

I would like to learn about how this works, and get the system up and running.

Best Wishes
Richard Demaret
KI4KXJ

 

--- On Wed, 8/3/11, Robert E. Seastrom <rs at seastrom.com> wrote:

From: Robert E. Seastrom <rs at seastrom.com>
Subject: Re: Bad Satellite Antenna
To: "Richard" <revo753 at yahoo.com>
Cc: tacos at amrad.org
Date: Wednesday, August 3, 2011, 6:00 AM


Stupid question - is there power to the power injector that sends
juice to the LNB on the dish?

-r

Richard <revo753 at yahoo.com> writes:

>               
                                                                
>  Hello,                                                                       
>  I am wondering if any of you have had a problem with a bad satellite         
>  antenna.  Last night we, in the Manassas area, had a  thunderstorm.  The     
>  picture on the satellite TV froze.  I rebooted the digital recorder set-top  
>  box.  It came back on.  I thought all was OK, and so continued watching
 my   
>  recorded programs.                                                           
>  Today, I found the the recorded programs is all I have. The set-top box says 
>  the antenna can not see the satellite.  We have two of these set-top boxes   
>  on two different TVs.  The result is the same on both of them.               
>  It would appear to me, the antenna is bad.  I looked it over a few hours     
>  ago, but could find nothing obviously physically wrong with it.              
>  I am wondering, if any of you have had a similar problem.           
         
>  Best Wishes                                                                  
>  73                                                                           
>  Richard Demaret                                                              
>  KI4KXJ                                   
                                    
>                                                                               
>
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> Tacos at amrad.org
> https://amrad.org/mailman/listinfo/tacos
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