12 Specifications EFA-200/-300
12-10
12.3.8 Result display
12.3.9 Additional functions
12.4 Spectrum FFT
Optional operating mode. Two different frequency ranges; see Ordering
information.
12.4.1 Brief description
• Measurement of the magnetic flux density or electric field strength based
on spectrum analysis through a Fast Fourier Transformation.
• Overlapping real-time operation for the frequency range 5 Hz…2 kHz,
also suitable for non-stationary fields (e.g. pulsed fields).
Sequential operation for the frequency range 40 Hz…32 kHz, useful for
stationary fields.
• Measurement status switchable between ongoing (RUN) and halted
(STOP)
Annex C: Fundamentals of FFT: see page C-1
Result display,
selectable
Instantaneous value (LIVE) or maximum value
(MAX)
Display type Digital and analog (bargraph), logarithmic scale
Digital display resolution 4 digits
Refresh rate 4/s
Units Percent (%)
Alarm function, visible and
audible
On / Off and adjustable threshold
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