Simple 22khz Switch Questions

[dennise]

OK these two questions are about as simple as it gets.

I have a Sadoun S-SM21H 22khz switch. It has LNC A, RX and LNC B ports (yes, it says "LNC"). Now I know the input ports are LNC A and LNC B; and the single output is the RX port. The 22khz coax signal switches the RX port to either the LNC A port OR the LBC B port.

Here are my questions:

1. What is "LNC"? Is this the same as LNB? Can I assume this switch's LNC ports can connected to LNBs?

2. Which "LNC" port is selected (i.e. switched to the RX port) when the 22khz is ON, LNC A or LNC B?

Is this correct .......

22khz ON: LNC A - RX
22khz OFF: LNC B - RX

or is this correct:

22khz ON: LNC B - RX
22khz OFF: LNB A RX

Such simple questions but I can't find the answers anywhere.

Anyone ............ ?????

[Muad'Dib]

LNC == LNB

Low Noise Block Converter