Originally Posted by
Jakebeth
Hi LarryJ - any chance you could explain how a nav signal and ATIS could (in cases where the would) co-exist on the same frequency? Are they modulated differently? Some sort of sideband issue? I've never understood how aircraft radios were able to perform multiple functions...
It's fairly common to have a NAVAID freq transmit more than just the morse code ID. Normally they'll have an area weather observation (AWOS); but if the NAVAID is co-located with an airport the ATIS or like weather and info will be broadcast. Most general aviation radios have the capability to receive either the identifier or the voice broadcast -- flick of a switch.
Sorry can't explain the technology that enables this; results are more important than the method!