Power inserter

[eramnauth]

Is it necessary that in order to get stronger HD signal , LNB needs extra power with a power inserter? Or is it better to use HD LNB.

[bobby]

no such thing as an HD lnb

[whoknows]

Is it necessary that in order to get stronger HD signal , LNB needs extra power with a power inserter? Or is it better to use HD LNB.

You can't give an l n b extra power. If for example the l n b requires 13(vertical polarization) and 19 volt(vertical polarization) then that is what they must have to operate properly. Some l n b require a power inserter to help carry the power or so the l n b doesn't strain or take it's power from the receiver. As mentioned in previous post that these l n b that we use for provider signal are used for SD and HD signal.

[Terryl]

The only LNB setups that would need a DC power inserter would be the Dish 1000 triple LNB, 3 or more LNB's on a 4x4 switch, a setup with a DP twin LNB with a second external DP single LNB attached to it's LNB input port, or a setup using a DP44 or DPP44 switch inline with 2 or more receivers.

The Dish triple LNB (sats 110,119,129) needs 650 mA of DC current to run correctly, 95% of the FTA receivers out there can only supply 500 mA, using this LNB without the DC power injector from a DPP44 switch may/could cause long term internal damage to the receivers power supply.

A 4x4 switch running 3 or more LNB's needs to be externally powered**, most FTA receivers may not be able to do so, not without some long term internal damage to the receivers power supply.

A DP44 or DPP44 switch needs the DC power injector as most FTA receivers can't supply the 20 volts DC at 1 amp needed to run it and 3 LNB's.

There are some receivers that have a rating over 500 mA, but the Dish 1000 LNB needs a stable DC voltage to run correctly, it does not use the +13 and +18 volt switching to go between the transponders like some standard LNB's do, if the FTA receiver has a rating over 500 mA then the DC voltage output needs to be FIXED at +18 volts DC or higher.

A setup with only one receiver and 3 separate LNB's run through a single 4x1 Diseqc switch would not need a DC power injector.



** Add up all DC current requirements for all attached LNB's, the switches DC current spec's and voltage requirements before running the switch off the receiver alone, if they add up to over the 500 mA rating (on most FTA receivers) then don't run it without some sort of external DC power injector.

[eramnauth]

I am using 3 receivers with 3 LNBs along with 4x1 Diseqc switches with DC power. If I remove the DC power the receivers work on and off. My major concerns if my setup would cause any damage to the receivers or the LNBs

[whoknows]

You didn't mention what l n b you are using but it does sound like legacy l n b. The DC power is not designed to have more power than required so you should have no concerns to the box or l n b being damaged.

[Terryl]

Yes the LNB type(s) he is using would be helpful, as my crystal ball is out of battery's, and finding a 37.8667 volt AAAAA battery is hard to do on this planet.





(sorry......my fault....too much beer during the 49er game)