Total posts : 45366
Who cares if you know the exact field strength. That wasn’t the test. The test was simply referrenced to the strongest field strength.
So you measure all the transmitter field strengths, assign the strongest as the reference point and based on ratio state how far below each other transmitter is.
And besides, you only need an accurate field strength measurement for Part 15.209 like when you plug a Talking House transmitter into an AC ground and nullify its Part 15.219 certification. Rich will corroborate this.