Measured spectral analysis parameters in two different size of regions of interest (ROI)
| Small ROI | Large ROI | |
|---|---|---|
| Power (dB) | ||
| Maximum | −16.6 (4.5) | −17.3 (4.7) |
| Minimum | −26.2 (4.4) | −27.3 (5.3) |
| Mean | −21.2 (4.4) | −22.3 (4.7) |
| At 40 MHz | −21.5 (4.7) | −22.7 (3.2) |
| Frequency at max power | 25.9 (9.2) | 24.9 (10.6) |
| Frequency at min power | 33.7 (5.5) | 32.6 (5.0) |
| Spectral slope | −0.16 (0.17) | −0.16 (0.17) |
| Y-axis intercept (dB) | −16.5 (8.7) | −17.4 (8.9) |