How to report an ATV signal 

The series of images with increased levels of "snow" are a rough guide to what ATVers would refer to as P0 to P5.

ATV users may have a poorer quality than the repeater as their signal into VK3RTV may be weak.
P0 very poor signal.	P1 more picture than snow.	P2 detail in picture.
Every ATVer attempts to achieve a "P5" picture with "Q5" audio.
P3 more detail than snow.	P4 great detail, bit of snow.	P5 perfect picture.

Pictures courtesy VK3KHB

Sound / Audio is measured in a similar way to picture except the "snow" is heard as "shussss" or "hisssss".
Lots of "shussss" or "hisssss" which is referred to as noise is a Q0, up to no noise being a "Q5".
"Q" is used here to identify the "quietness" of the audio signal.

This series of 3 second wave files (~23KB each) with decreased levels of "noise" are a rough guide for Q0 to Q5.

Q0 wave Very Noisy, hint of Audio

Q1 wave Audio is above Noise

Q2 wave more Audio than Noise.

Q3 wave ~50 audio / ~50 noise

Q4 wave a little bit of Noise

Q5 wave Very quite no Noise.

Wave files courtesy VK3KHB