Split a wideband lnb signal

[Pride Of Cucamonga]

Yes, Vision one looks good. Reference the directional voltage indication, I have tested some to see if the direction is truly one way and found that the ones I tested were, although it was quite a while ago, so can't remember which ones they were.

Cheers. Anyone know if Sky Q powers LNB on H cable, V cable or both?

 

[PaulR]

I don't think a satellite switch would work anyway as, if I'm right about the Q box, the box will supply voltage at all times.

 

[rolfw]

Cheers. Anyone know if Sky Q powers LNB on H cable, V cable or both?

I suspect it'll power on SAT1 , as that's the one used for dSCR connection, however, don't know whether that'll be H or V, probably Vertical and probably both inputs provide power.

 

[Terryl]

I don't think a satellite switch would work anyway as, if I'm right about the Q box, the box will supply voltage at all times.

A standard satellite switch isolates each receiver's power from each other, it will switch between H and V transponders at each satellite receiver output independently, if RX 1 (main receiver) is on an H transponder then any other RX (2,3 or 4) can be on any transponder polarity, if more then one satellite LNB is attached then the receivers can select any of the attached satellite's, independent from the main receiver.

EMP/Centauri has a nice line of switches for this application.

 

[PaulR]

I thought you meant a switch that senses whether or not power is coming from the satellite box or not, i.e. a priority type switch. I think you're talking about a switch which operates when fed a (12v?) signal. Again, a problem with Sky as their boxes do not have such an output as far as I know.

 

[Pride Of Cucamonga]

I suspect it'll power on SAT1 , as that's the one used for dSCR connection, however, don't know whether that'll be H or V, probably Vertical and probably both inputs provide power.

So you could do the power pass on H to receiver A and power pass on V to receiver B, thus if one fails the other will still provide power to the LNB?

 

[Terryl]

I thought you meant a switch that senses whether or not power is coming from the satellite box or not, i.e. a priority type switch. I think you're talking about a switch which operates when fed a (12v?) signal. Again, a problem with Sky as their boxes do not have such an output as far as I know.

No, a standard linear LNB switch will only route signals, it uses what ever DC voltage is coming from the #1 receiver, most linear LNB's (that I know of and have used) use a DC voltage to switch transponders, +13 volts DC will get you all the Vertical transponders on that satellite, +18 volts DC will get you all the Horizontal transponders on that satellite.

So a multi receiver linear LNB switch will have two or more inputs, one for the +13V vertical transponders and one for the +18V Horizontal transponders, it then supplies the correct transponder polarity to what ever receiver voltage is present at the # 1, 2, 3 or 4 receiver port.

So receiver # 1 can be on a V transponder and receiver #2 can be on a horizontal transponder.