7-10 Performing the Measurement Model 831 Manual
Back Erase
The back erase function permits the user to rapidly delete
from the measurement the effects of acoustical events that
have occurred during the previous five or ten seconds.
Back Erase Disabled
The back erase feature is unavailable when any of the
following have been enabled:
• Measurement History, described in “Measurement
History” on page 12-1.
• Event History, described in “Event History” on page 13-
1.
• Spectral Ln, described in “Spectral Ln Mode” on page 4-
7.
• Event Sound Recording, “Noise Event Sound
Recording” on page 16-21
Back Erase Implementation
The back erase is implemented when the measurement is
paused, as described in the preceding section. When the
measurement is paused, the center softkey will be labeled
Back-5s, as shown in FIGURE 7-8.
FIGURE 7-8 Five Second Back Erase Label
5 Second Back Erase Label
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