NARDA FieldMan, User Manual

Page: 78 / 126

8 Operating modes
78
FieldMan Narda
8.5 SPECTRUM
The
SPECTRUM
operating mode enables the FFT analysis of the measurement signal
in the selected frequency range with display of the frequency spectrum, evaluation via a
frequency marker and display of the broadband level. Either one of the single axes
X
,
Y
or
Z
or
Isotropic
can be selected as the measuring axis. In addition, a selectable limit
value curve can be displayed in the spectrum. When the unit
%
is selected, the spectrum
is normalized to the field strength limits of a personal protection standard.
8.5.1 Measurement settings
The
MEASUREMENT SETTINGS
menu provides quick access to the most important
measurement settings for the selected operating mode.
Function
1)
Description
Reset Results
Reset measurement results
Zero
Offset correction (HP01 probe only)
⇒
See
10.3 Offset correction – Zero on page 102
.
Result Type
Result type (see Result type on page 79 )
Frequency Span
Frequency range
Frequency Scale
Linear or logarithmic scaling
Field
Electric or magnetic field
FFT Points
Determines the frequency resolution of the FFT analysis
(number of frequency values = FFT points / 2)
Range
Measuring range
Axis
Spatial axis of the probe shown in the graph
Unit
Display unit
Low Cut Filter
Filter for suppression of low frequencies (low cut filter)
Detector
Detector type:
RMS
,
Peak
Standard
Displays a selection list of the standards according to
whose limits normalization is performed or the limit pro -
gression is displayed in the spectrum (see
8.5 SPECTRUM on page 78
).
Number of Averages
Number of spectra over which averaging is performed
1) The available parameters depend on the selected operating mode and the connected probe
type.