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Archived from groups: alt.video.ptv.tivo (More info?)
In article <MPG.1ccddb6ae364236d98a08f@news.easynews.com>,
theyak <yak@dev.null> wrote:
>> >Yes, splitters do work with directv, provided they can handle the
>> >correct frequency range.
>> What are you trying to tell the OP, yak? You are basically telling him bad
>> info that will most likely fry his box.
>What do you think a multiswitch is, eh? It's a high frequency splitter.
>That's it. Go to radio shack and buy one.
That's not it. A splitter (high-frequency or otherwise) will not work
correctly for a DirecTV dish system.
DirecTV satellite feeds actually include two completely separate set
of transmissions on each frequency. The transmissions are polarized
differently - one is lefthand-circular polarized and the other is
righthand-circular polarized.
In a direct receiver-to-LNB hookup, the receiver controls which
polarization is being detected by the LNB, by changing the DC voltage
it feeds up to the LNB.
If you try to "split" a single-LNB feed between two receivers, then
the two receivers will be feeding different voltages to the LNB
roughly half of the time. When this happens, one of the two receivers
is certain to not get the set of signals it is expecting, and it'll be
unable to lock onto the channel it wants.
A Multiswitch is an actively-powered signal selector. In a simple
multi-receiver setup, the switch is hooked to two LNBs. The switch
forces one LNB into LCP mode, and the other into RCP mode, by feeding
the LNBs two different voltages. The switch then selectively feeds
one or the other of these sets of signals down to the receivers, based
on the DC voltage it sees on each of the "to receiver" ports.
You can't do this with a simple passive splitter, no matter how wide
its bandwidth. You need an active switch.
--
Dave Platt <dplatt@radagast.org> AE6EO
Hosting the Jade Warrior home page: http/www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!
In article <MPG.1ccddb6ae364236d98a08f@news.easynews.com>,
theyak <yak@dev.null> wrote:
>> >Yes, splitters do work with directv, provided they can handle the
>> >correct frequency range.
>> What are you trying to tell the OP, yak? You are basically telling him bad
>> info that will most likely fry his box.
>What do you think a multiswitch is, eh? It's a high frequency splitter.
>That's it. Go to radio shack and buy one.
That's not it. A splitter (high-frequency or otherwise) will not work
correctly for a DirecTV dish system.
DirecTV satellite feeds actually include two completely separate set
of transmissions on each frequency. The transmissions are polarized
differently - one is lefthand-circular polarized and the other is
righthand-circular polarized.
In a direct receiver-to-LNB hookup, the receiver controls which
polarization is being detected by the LNB, by changing the DC voltage
it feeds up to the LNB.
If you try to "split" a single-LNB feed between two receivers, then
the two receivers will be feeding different voltages to the LNB
roughly half of the time. When this happens, one of the two receivers
is certain to not get the set of signals it is expecting, and it'll be
unable to lock onto the channel it wants.
A Multiswitch is an actively-powered signal selector. In a simple
multi-receiver setup, the switch is hooked to two LNBs. The switch
forces one LNB into LCP mode, and the other into RCP mode, by feeding
the LNBs two different voltages. The switch then selectively feeds
one or the other of these sets of signals down to the receivers, based
on the DC voltage it sees on each of the "to receiver" ports.
You can't do this with a simple passive splitter, no matter how wide
its bandwidth. You need an active switch.
--
Dave Platt <dplatt@radagast.org> AE6EO
Hosting the Jade Warrior home page: http/www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!