Split a wideband lnb signal

D

DeadHorse800

Regular Member
Messages
248
My Satellite Setup
Cheap piece of junk Spanish (Tecatel) 120cm(x110) dish, Inverto Ultra twin LNB and Sky HD box.
My Location
Valencia (city)
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

PaulR

Dazed and Confused Admin
Staff member
Messages
16,565
My Satellite Setup
-----------See sig-----------
My Location
Wirral, NW UK and Vaucluse, France.
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

rolfw

Believe it when I see it Admin.
Staff member
Messages
37,927
My Satellite Setup
Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
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

Terryl

Specialist Contributor
Messages
2,552
My Satellite Setup
OpenBox X5 on a 1 meter motorized dish.
And now a 10 foot "C" band dish.

Custom built PC
My Location
Deep in the Boonies in the central Sierra Nevada mountains of California.
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

PaulR

Dazed and Confused Admin
Staff member
Messages
16,565
My Satellite Setup
-----------See sig-----------
My Location
Wirral, NW UK and Vaucluse, France.
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.
 
D

DeadHorse800

Regular Member
Messages
248
My Satellite Setup
Cheap piece of junk Spanish (Tecatel) 120cm(x110) dish, Inverto Ultra twin LNB and Sky HD box.
My Location
Valencia (city)
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

Terryl

Specialist Contributor
Messages
2,552
My Satellite Setup
OpenBox X5 on a 1 meter motorized dish.
And now a 10 foot "C" band dish.

Custom built PC
My Location
Deep in the Boonies in the central Sierra Nevada mountains of California.
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.
 
Top