SE Noise canceling - 11.8" or detecting height? :blink:

[king-ghidorah]

I was perusing through older threads and a user mentioned this point that I will say out here verbatim in a PM that he sent to me.

We are told to do noise canceling at a height of 30cm (almost 12") when we first begin our MD session if you're doing auto.

But what he says makes more sense to me,

"Ive always ground balanced at detecting heights. Every thing affects balancing and it makes no sense to balance for noise at knee high when you are not detecting there."

AND

"Also if you encounter EMI from the ground would you noise cancel at swinging heights or 30 cm?"

This makes a lot of sense to me unless I am missing something here. So why are we doing this at 11.8"?

 

[Jim upstate NY]

in a clear area of no targets... I think they want you to use the air cause you dont want to be picking up ground targets and your not really ground balancing, your noise canceling.. the interference comes from the rf in the air not the ground.. I am just lazy and noise cancel while I am drinking water, lighting a smoke or relieving myself