RF24 - nrf24l01+ - scanner example

I am looking at the scanner example from the RF24 Library.

The example is here:

http://maniacbug.github.com/RF24/scanner_8pde-example.html

Can someone explain to me what I should be seeing?

From the code if it detects a carrier it increments a counter for that channel.

So is a carrier bad? ie there is some other wifi device on that channel?

Do I want to use a channel for my code which has a value of 0?

Chris

Detecting signal when you are not transmitting is bad. It means an interfering signal was detected. If you have a choice of frequencies you should pick the one with the least interference.

Thanks John

Chris