4 Measuring with the NBM-520
34 NBM-520 Narda
The results from shaped probes are always displayed in %.
A shaped probe provides a frequency sensitivity that mirrors
a particular standard, such as ICNIRP. Values in % (of stan-
dard) are related to the equivalent power density limit, not to
the field strength.
To select the units
Press the Units button repeatedly until the desired units
are displayed.
Note: If the unit is changed, the limit value setting of the alarm
function will be automatically adjusted.
4.9 Freezing a result
1. Press the Hold button to hold the measurement value
that is currently displayed.
2. Press the Hold button again to resume measuring.
4.10 Changing the field type measurement
The E-field and H-field probes can only measure the field
type for which they were designed. The field type is selected
automatically according to the probe used.
Combination probes can measure electric as well as mag-
netic fields. You will need to select the field type on the
instrument. The field type is shown at the bottom left of the
display.
To change the field type
Press the Hold and Mode buttons simultaneously (tog-
gle function).
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