Tom,
a little help here? if I am
going to look at sat. A and sat. B with 2 dish's is there a way to
hook them into the same input on one receiver?
thanks John [EMAIL PROTECTED]
----- Original Message -----
From: TGundo 2003
Sent: Saturday, October 16, 2004 11:16 PM
Subject: Re: [Repeater-Builder] Direct TV type dish? I work for a high-end Custom home electronics company and deal with directv
all of the time. Heres a few bits you may or may not find intresting.
1. Rain fade. Want to limit this? Put up three 1 meter dishes to look at
the birds and have better signal reception. Yes, its an eyesore, but you hardly
ever get rain fade!. The dishes are getting smaller and looking at three
different positions in the sky, so they give up gain with the dish itself to
look at all of these at the same time. They get away with this because the birds
themselves are relativly high power. You can use up to a 1 meter dish to look at
any one position in the sky and get much better signal, but not any bigger
because again, the dish is too focused, At the 101 degree position there are
actually three satellites which if I remember right are about 50 miles apart
from each other in orbit, but at 24000 miles away thats virtually a single point
in the sky from here. However, a dish bigger than 1 meter can single out one of
the satellites. For you who have directv and have looked at your signal meter,
with a 1 meter dish setup almost all of the transp! onders will read 100 all of
the time with clear skys or even light clouds, and you hear toto flying by when
rain fade actually knocks the signal out all together.
2. For long runs or commercial installs the standard is RG-11 coax to
maintain signal level. There are amplifiers used for this as well. Stacker
systems are becoming more common in MDU and high rise buildings. Basically,
conventional satellite systems work 900 to 1500 as noted in a previously. The
issue is that the reciever has to send a signal to the dish to switch between
the a and b lnbs to look at the different birds, they cant both come down the
line at the same time because they are both oviously coming down at the same
frequency. You cannot just "split" the signal to multiple recievers because they
would battle for control over the dish as channels are changed. Because of that
distribution of that to dozens of recievers in a large building starts to get
complicated because of the voltage switches needed to facilitate the
switching. The Stacker system sends the second dish feed down at 1500- 2 gig, so
that all of the signals are on the line at the same time,! a on 900-1500, b on
1500 - 2000. Many of the recievers out there already have tuners built in that
can accept the wideband input, just a simple trip into the service menu on the
box and turn it on! Now we can amplify and split as needed to feed as many as
you want! But RG-11 and 2 gig rated splitters and amps are a must.
Thats my two cents on the matter.
Tom
W9SRV
bob <[EMAIL PROTECTED]> wrote:
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