8-20 E.A. History Model 831 Manual
No had been selected for the Save as Standard E.A. Level
inquiry it will be saved.
Background Noise
If the measured level during calibration is not stable, the
Model 831 will assume that there is contamination due to
background noise and abort the calibration. Also, the E.A.
calibration spectrum can be viewed to see if there was any
significant out-of-band energy.
E.A. History
The last ten calibration E.A.calibration check levels are
saved in a Check History. These are displayed on the E.A
History tab, shown in FIGURE 8-21,
During EA calibration the LDN is
paused. The net result has no effect
on the history data while the
calibration tone is on.
.
FIGURE 8-21 E.A. History Tab
Note that E.A. History is only
available when using either the
426A12 or PRM2100 Outdoor
Preamplifier, as indicated in the
upper section of the display.
The parameters for the most recent calibration appear at the
top of the list. Both the absolute level measured and the
difference from the Standard E.A. Level setting appear for
each calibration, as well as the data and time of the
calibration.
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