It does. It's just that my laptops don't have the 5.0GHz adapter.
How does one measure interference?
Don’t worry about it.
With a spectrum analyzer...not something you would do....just run your laptops on their existing 2.4GHz WiFi card....
Why do you want to use the other frequency? Usually it is because of interference issues.
For example, a leaky microwave in the kitchen will interfere with 2.4GHz.....
I have a desktop in my kitchen that whenever the Microwave is on can’t stream video...