Should your area require the Ku and C polarities be opposite you can follow these simple instructions to change your BSC621-2D C/Ku LNBF.

Separate the C and Ku housings by removing the three screws that hold them together.

Remove the LNBF from the Ku housing by removing the 'F' connector nut and pushing on the 'F' connector until the LNBF is pushed out of the housing. Use care not to damage the 'F' connector.

In the picture below, using the left slot will make your Ku polarity the same as your C polarities. Using the right hand slot will make your polarities opposing or reversed.

This picture shows the flange on the LNBF and the slots on the housing.

Here we are assembling the LNBF and housing using the 'same polarity' slot.

Another picuture using the same polarity slot.

Once the LNBF is fitted into the proper slot, finish by pushing the LNBF into the housing until the rubber 'O' ring seal is seated.

Carefully replace the Ku assembly onto the C assembly aligning the 'F' connector offset on the Ku housing to the 'F' connector on the C housing.

Once properly assembled, replace the 3 screws that hold the two housings together.