I was able to make a couple of PEM injections during ER7, not enough to get a full picture, but because it is of interest, we superimposed magnetic noise prediction points for the ITMX injection onto the plot for coupling at ETMY (figure). The predicted level for ITMX is flatter in frequency (some cable coupling?) but the coupling level near 10 Hz, where the prediction is closest to the DARM noise floor, is lower than for ETMY.

Robert S., Katie Banowetz