Hooked up 2 carbon 9s, the one at console has a AI 3 in 1 transducer on the jack plate and a PDRT-WBL shoot thru with the external temp sensor, I have the 3 in 1 on channel 2 and the shoot thru at channel 1, I only get a temp reading from the shoot thru transducer temp sensor even when I change sources to channel 2. how do i switch to read at the 3 in 1 transducer when on channel 2? also when i tried to network them with ethernet i was only getting temp from the front transducer.