Dish 300 LNB has two output connectors - why?
Bill Jeffrey
I have an old DISH 300 antenna that I just moved to a new location. To
make the move easier, I wanted to remove the big roll of coax cable
temporarily. In doing so, I discovered that the LNB has two output
connectors - the roll of cable was connected to one, and the other had
nothing on it.
I was under the impression that the DISH 300 is a single-satellite
antenna, which ought to make it a single LNB antenna. What am I missing?
What is the second connector for?
Thanks
Bill
Char Jackson
Sounds like it might be a Dish Pro (DP) LNB. If so, it will have the
DP logo on it and the second connector can be used to drive a second
receiver.
D. Stussy
news:1Az%k.4170$dm3....@newsfe02.iad...
A second receiver.
Bill Jeffrey
> "Bill Jeffrey" wrote
>> Subject says it all, I guess.
>>
>> I have an old DISH 300 antenna that I just moved to a new location. To
>> make the move easier, I wanted to remove the big roll of coax cable
>> temporarily. In doing so, I discovered that the LNB has two output
>> connectors - the roll of cable was connected to one, and the other had
>> nothing on it.
>>
>> I was under the impression that the DISH 300 is a single-satellite
>> antenna, which ought to make it a single LNB antenna. What am I missing?
>> What is the second connector for?
>
> A second receiver.
Aha! So the LNB output is duplicated at the second connector, meaning
that I don't have to muck around with a splitter, and the associated DC
power problems, if I want to use another TV with another receiver. Thanks.
Bill
joetu...@yahoo.com
horizontal polarity and were selected by voltage difference from the
reciever!!
After I explained the polarity flip floped via probagation, they
made
them both to except 18 volts and used the extra output as a dually.
They now call this combined polarity phenomenon "circular"<I;-)
Heres you a good read on that but the original post was edited to
read
cicular instead of horizontal simply to shut up the critics! They had
to have the word "circular" involved but thats technobabble!! All
the networks started supplying all their programs via !8 volts
normaly
horizontal! Thus lots of pirates without a multiswitch recieved burnt
out lnbs$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
http://groups.google.com/group/alt.dss.hack/browse_thread/thread/3b2d...
Char Jackson
It's good you figured it now, because a splitter wouldn't have worked.
Char Jackson
>The ones pryor to the two room hook ups were for vertical or
>horizontal polarity and were selected by voltage difference from the
>reciever!!
No '!!' necessary. Those older LNB's are still fairly common and are
simply called Legacy now.
>After I explained the polarity flip floped via probagation, they made
"polarity flip floped via probagation"? What would that be in
English?
>them both to except
Even if you meant to say 'accept', it still isn't right.
>18 volts and used the extra output as a dually.
If you're trying to say that a Dish Pro LNB with two outputs is called
a Dual, then yes.
>They now call this combined polarity phenomenon "circular"<I;-)
Ummm, circular refers to the polarity of the signal as it comes off
the satellite, and has absolutely nothing to do with the number of LNB
outputs. The thing you're trying to describe is called Dish Pro.
Naturally, you posted 3 times, as always. What's with you and triple
posting? Do you earn points by the number of posts you make? Do you
get your kicks by being as wrong as possible?
DELETETHIS
DELETETHIS
joetu...@yahoo.com
Tech allows me to post multiple times it builds up my character I'll
soon be a gold member<I;-) They use to let my post go to every site on
usenet but they will probably add an edit feature if the band width is
in jeapordy!!
Installers hate to be corrected especially when they're wrong!! That
RG59 spliter still works ,The multiswitch is a thing of the pas,
now,that they use both polarities at once on each port!! The dip
switch that seporates the recievers is still in use!!
Spell check Please Loopy
joetu...@yahoo.com
joetu...@yahoo.com
wrote:
> http://groups.google.com/group/alt.dss.hack/browse_thread/thread/3b2d...
I posted that back in the year 2002 and can you believe some
installers still believe there is a circular polarity?? The lefthand
and righthand thingy was DTVs way of robbing the gullable by selling
usless switches and special LNBs
Clarafication:: A scope to read the helical patern of an array from a
yagi will show if the feed is on the opposing sides of the driven
element!! Left side shows clockwise rotation where as the right side
feed shows a counter clockwise rotation!! This Rotation is of NO
importance to a recieving antenna/LNB!! Thus left-handed or right-
handed is all technobabble! Exception is a cophased helical
TRANSMITTER with opposit patterns travel greater distances with less
fade!!
Probagation in English: Rf waves do a 90 degree flop( vertical to
horizontal) upon every reflection be it by
clouds,temperature,weather,ionusphere ect....
The polarity change(REFLECTION) can be done within an LNB by adding a
simple dielectric reflector ! The cross hairs(dieletric) in the
middle of an LNB is susposed to flop the vertical to horizontal and
vise-versi!!
to be continued at our next CLASP
joetu...@yahoo.com
The reflector inside an lnb is usless sales fodder! Its purpose was
to change the reciving polarity to the opposite one!
Example if the strongest recieved polarity is vertical and is
converted to horizontal within the LNB it has been reduced in
quality!! Like wise in vise versi! Soo there is no need to covert or
flop the polarity at the lnb as it might be coverted to a poorer
signal!!
The only change in the LNB should have been to cut out the resistor
and enable both sides of the lnb to except the 18volts to either port
with out over heating its components!! This would allow a faster rotor
movement!!
The Transponder on the other hand should still be allowed to transmit
both polarities simultaniously so no mater how many flops occurs it
still will be recieved by the lnb as the one with the most quality!
Who did I loose??
Yvan Hall
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"Bill Jeffrey" <wjeff...@alum.DOTmit.edu> wrote in message
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