Your best bet is to listen to steve and get a waveform/vectorscope.
Also, use colour bars, and set your levels to match the colour bars.
ie. The brightest part of your images shouldn’t go any higher than the brightest point of the colour bars. Same with the blacks.
As long as you stay within those ranges there shouldn’t be any issues.
The correct level for black in digital is 0 IRE (If you want to be ultra conservative you could set your blacks to 7.5 IRE analog). White is 100 IRE.
As long as your footage is setup the same as your bars, no engineer can say boo.
Just to let you know I am a broadcast technician, so I know a little about what I am talking about.
Ryan