User manual

Reference: Making Measurements
WFM 90 & WFM 91 User Manual
3–15
Audio Graticule
The audio graticule does not utilize a horizontal scale since the
signal free-runs at a two-field sweep rate. The vertical scales are
comprised of the audio reference level and the selected headroom
setting mirrored around the baseline. The audio graticule is
illustrated in Figure 3–7 with –3 dB headroom selected, and in
Figure 3–8 with +10 dB headroom selected.
0 dBu
0 dBu
–3dB
–3dB
Figure 3–7: Audio graticule with –3 dB headroom selected
+10dB
0 dBu
0 dBu
+10dB
Figure 3–8: Audio graticule with +10 dB headroom selected