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Discussion Starter · #1 ·
I just got a new H20 receiver and when the service tech installed the new AT9 dish I started getting some strange behavior. Basically certain channels, such as 107, 204, 206, 245 (plus a few more) exhibit "Searching for Satellite". All the other channels are fine. This problem exists on all my receivers.

In addition to the H20 I have 3 RCA DRD420RE(s), an R15, and a Hughes DVR80. The rg6 from the dish connects to the inputs on a wb68. The service tech who installed the dish came back last night and changed the multiplexer with no change in behavior. We then removed the diplexers from the non HD receivers. Once this was done, the behavior got even stranger. If the DVR80 is tuned to one of the channels that we had problems with, then all receivers get the channel. If we change the channel on the dvr80 then the other receivers will lose the satellite for that channel.

Any thoughts or suggestions on where I might get an answer? As of now the tech is planning on coming back today or tomorrow and installing a new dish.

thanks

John
 

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Éminence grise
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It sounds like either be a bad multiplexer and/or dish or there is a cabling problem (are the cables quite long or do they have copper-coated steel conductors?) Diplexers should not be used with the 5LNB dish or WB68, but I can't see where they would cause those problems. I suggest connecting 4 of the tuners directly to the dish, bypassing the WB68. If the problem remains, it is probably a bad switch on the dish itself.
 

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Discussion Starter · #3 ·
I connected four of the older receivers directly to the output of the at9 dish (eliminating the wb68) and the channels now appear to be okay. Does this mean it is the wb68? what are the chances of two bad ones? Or could it be a cable to one of the other receivers (this doesn't seem likely to me as if there were a cable problem why would it affect only some channels?)

thanks

john
 

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Using the cabling that you had in place initially, bypass the WB68 (by using barrel connectors) and feed your various receivers/dvr tuners in various combinations so that all 4 of the lines are in use at the same time. Tune the receivers or dvr tuners to channels 490 and 491 (first all on 490, then all on 491, then varying combinations). Then do the same thing on channels 492 and 493.

Somewhere along the way you most likely have a bad cable or connector, and it's going to take some searching to find it.

Carl
 

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Discussion Starter · #5 ·
Well, I have tried almost all cable combinations with the multiswitch and satellites. I even tried cascading my old powered multiswitch, which didn't work at all. I thought I had it this morning by putting in a amplifier in my longest cable run to a receiver (which is 100+ feet), but after an hour the channels started missing again. I have replaced most of my cables and now I am totally stuck. I have called D* and they think it is either the multiswitch or a ground problem and I have another service call scheduled for next week. Still missing about 12-20 channels. I have my doubts about D* remote diagnosis and the service tech ability to fix anything - all they seem to be able to do is install dishes.

Any thoughts?

Thanks

John
 

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With cable runs over 100 feet, the problem may well be that you are not feeding enough dc voltage to the dish. The WB68 being non-powered will add to that problem.

However, cascading your old powered multiswitch should work. Do it like this: Take the 4 lines from the dish to the WB68. Take 4 lines from the WB68 to the inputs of the powered multiswitch. Feed everything except the H20/HR20 (MPEG4 receivers) from the powered multiswitch, and feed the MPEG4 receivers from the remaining outputs on the WB68.

I would put the powered multiswitch close to the WB68 if possible.

Carl
 

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Discussion Starter · #7 ·
Carl

I tired exactly what you suggested and whenever I put more than two cables between the two switches the outputs from the second (powered) switch dropped out. In other words I wasn't able to successfully connect all four cables. With only two cables connected I then wasn't able to get all channels - I was missing all the locals. Perhaps this means my WB68 multiswitch is faulty?

thanks for the help

John
 

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Discussion Starter · #9 ·
Well, directv service tech came out and first of all replaced connectors connected to the wb68 with no change - still missing channels. They finally replaced the LNB assembly (fortunately they had a at9 dish that came in without hardware - otherwise who knows how long i would have had to wait for new parts) and voila the missing channels appeared.

thanks for all the help and tips

John
 
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