Hmm, OK, I guess I should explain more since I don't myself know what I
need. I have subscribed to Bell ExpressVu, which uses the same hardware as
DishNetwork in the states. I want to connect two receivers, a 5100 (same as
the 501) and a 2700 (don't know what the equivalent for DishNetwork) to one
connection on the dish (the other connection is used by a third receiver).
What kind of splitter would be needed in this sort of config? Would a
"splitter with diodes to pass DC power to the dish be enough (in which case
I would simply mod a splitter I have to pass DC with diodes) or do I need
what you describe below? Thanks for any help. TTYL

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Robert Rolf
> Sent: Monday, December 24, 2001 12:17
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [OT]:What's inside a Satellite Splitter?
>
>
> You really need to stop buying stuff from any dealer who tries to charge
> you $100 for a plain Jane 'splitter'.
>
> IF, on the other hand, you are actually talking
> about a multireceiver switch, one that lets each receiver work
> independantly
> on each polarization, then the $100 price is about right for a 4 port unit
> bought from a dealer.
>
> They call them 'magic switches' because they take two
> polarizations in, and
> deliver 2 polarzations out to each reciever, as commanded by the
> power voltage
> the receiver supplies. E.G. 12V gets you one polarity, 15V gets
> you the other.
> The switch of course provides 12V on one lead to your dish, and 15V on the
> other, regardless of what the receivers supply.
> >From what you've described of your system, you do need a 'magic switch'
> since your system does not used 'stacking', where H & V polarizations
> are stacked in frequency so passive **Satellite rated** splitters work
> just fine.
>
> Satellite splitters are 'special' in that they work in a much higher
> frequency band (950-2000 Mhz, 950-2500 for stacked) and they pass power.
> Yes, they use plan old 1N4000s (I had a 4:1 apart to put diodes on the
> other 3 ports because of the way I run my IRDs).
>
> You could build your own M/Sw with some coaxial relays, zeners,
> diodes, transistors and some $7.00 passive splitters,
> but is it really worth your time?
> And do you have the skill/understanding of what's involved in working
> at SHF frequencies? It doesn't take much to kill the signal level at
> those frequencies, so most M/Sws have some gain in addition to the
> switching logic. By the time you've bought the needed parts, you'll have
> paid twice as much.
>
> With the huge volume of DTH systems out there, you shoud be able to
> find what you need via mail order, in the $50 range.
>
> Robert
>
> "Tim H." wrote:
> >
> > Howdy,
> >
> > I'm not sure where you're getting these $100 prices, but a quick search
> > on Google (for satellite splitter) turns up this page along with many
> > others..
> >
> > http://www.futurehomesystems.com/v501.shtml
> >
> > $5 for one splitter, $10 for some others.
> >
> > Another:
> >
> > http://shop.store.yahoo.com/wildwestelectronics/ssd-4.html
> >
> > For $7.57
> >
> > Are you sure these "splitters" are strictly passive? I know amplified
> > splitters are a bit spendy, but not passives.
> >
> > As for a FAQ...
> >
> > http://www.faqs.org/faqs/Satellite-TV/FAQ/
> >
> > Kind of dated but might be interesting nonetheless!
> >
> > Off to doctor's appt. (yea, on Christmas Eve!)
> >
> > Happy Holidays,
> >
> > Tim Hamel
> >
> > Herbert Graf wrote:
> > >
> > > I just switched from cable to a direct to home satellite
> service and I want
> > > to add a third receiver, however my dish only has 2 outputs.
> I've looked
> > > into it and it turns out that I need a "satellite splitter".
> I have checked
> > > prices and they are INSANE!! Is there something special about
> these things
> > > to make them worth 10 times the price of a "normal" splitter?
> I've looked
> > > around and it seems that all that is in one of these things
> beyond a normal
> > > splitter is a few diodes, is this correct? Anybody know what
> diodes these
> > > would be? (just common 1n4001s or are them something
> special?) Anybody have
> > > any idea how hard it would be to just build one of these
> beasts? Also, if
> > > anybody can point me to a technical FAQ on how direct to home
> satellite
> > > works I would love to know. For the record I'm not trying to
> do anything
> > > illegal, I am a legitimate subscriber who doesn't want to pay
> $100+ for a
> > > splitter. Thanks for any info. TTYL
>
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