Legacy lnbs are known for giving problems when more than one receiver is connected to them. I love the bandstacked technology and I wish our receivers would support the bandstacked lnbs.

I have tried dual c band lnbs from WSI, DMS, and Geosat. None of these lnbs have worked they I think they should with two receivers powered on. The problem with these lnbs is the ports are not isolated.

Do a simple test. Connect two receivers straight to your dual c band lnb, bypassing any switch or multi-switch. Turn on both receivers for a few minutes, then select a c band satellite on one of the receivers. Go into the antenna setup and turn the lnb power off. Did the signal from the lnb go away once the lnb power was turned off? Can you watch tv with the lnb power off? Do both polarities work with the lnb power turned off, or does the polarity work that the other receiver is tuned to?

All of the dual lnbs that I tested will have some power on both ports even when the power is turned off on one port. This bleed-over creates issues that may or may not be easy to see. Some receivers I have would switch polarities in an environment like this, but others would not.

Adding a multi-switch such as a Zinwell MS3X4WB-Z seemed to help some. These Zinwell switches are designed to be connected to a lnb that has separate H & V ports. All of the lnbs mentioned above have both polarities active on each port, and the ports are not completely isolated.

The only dual lnb that works correctly for me with multiple receivers connected to a Zinwell multi-switch is the Pauxis 1600 lnb. The Pauxis 1600 lnb has separate H & V ports so it is designed to work with the Zinwell multi-switch mentioned above.


Recently I had an interesting experience with a ku lnb. I have the WSI ESX522U-FE connected to two receivers without using a multi-switch. The two ports on this lnb do not share power. With both receivers powered on, I can turn the lnb power off on one receiver and the lnb power goes to zero on that receiver like it should. This lnb has operated two receivers without any problems or issues so far.

I have seen some ku lnbs advertising 4 local oscillators. A normal standard lnb has one local oscillator, and a ku universal lnb has two local oscillators.
IF the new ESX522U does have 4 local oscillators then it would be about the same as having to universal lnbs in one housing! That is about the only explanation I have for it working like it does. EB