Model 831 Manual Time History Display 11-15
In this display, the time history of the LZeq level is shown at
1.00 kHz, the frequency of the cursor position used in
frequency spectrum display shown in FIGURE 11-10 when
changing to this display. Use the 4 and 6 keys to change the
record number (time value).
Left/Right Arrow Keys
For the display shown in FIGURE 11-12, the 4 and 6 keys
can have several roles as listed below. Use
5 to toggle
between them:
• Change Record
• Change Frequency
• Change Metrics (Measurement Parameters)
At any time, the role of the left and right arrow keys, as well
as the means to change it, are indicated in the lower portion
of the display, as shown in.FIGURE 11-13.
FIGURE 11-13 Role of Left/Right Arrow Keys: Frequency Band Time History
Left and Right Arrow keys
Change Record
Left and Right Arrow keys
Change Frequency
Left and Right Arrow keys
Change Metrics
Switch role of left/right
arrow keys from
“Change Record” to
“Change Frequency”
Switch role of left/right arrow keys
from “Change Frequency” to
“Change Metrics”
Switch role of left/right
arrow keys from “Change
Metrics” to “Change
Record”
5
5
5
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