NARDA FieldMan, User Manual

Page: 98 / 126

10 Cross-mode functions
98
FieldMan Narda
10.1 Post-Processing
⇒
See
7.5.1 POST-PROCESSING on page 47.
This menu contains settings for post-processing the measurement data of broadband HF
probes. These setting options are thus limited to the operating modes of
FIELD
STRENGTH
,
SPECTRUM
and
TIMER LOGGING
. Two types of post-processing are
available:
• The application of a correction factor
• The conversion to display in % of the standard for measured field strengths at a
reference frequency
For evaluating probes, only the correction factor can be applied.
10.1.1 Applying a correction factor
10.1.2 Setting the reference frequency
⇒
See 7.5.1 POST-PROCESSING on page 47:
Apply Correction Factor CF
When calibrating the HF probes, the measuring error at the defined calibration frequen-
cies is recorded and stored in the probe. If the correction is applied (
Apply Correction
Factor CF
=
On
), then the measuring error is taken into account in the measurement
result and thus a higher measurement accuracy is achieved. However, the correction can
only be applied meaningfully when measuring at a single prevailing frequency, which
must also be known. If this frequency does not exactly correspond to a calibration fre-
quency, it can still be entered as a reference frequency (
Reference Frequency
) and the
corresponding correction factor is then determined by interpolation from the adjacent cor-
rection factors.
⇒
See
7.5.1 POST-PROCESSING on page 47: Reference Frequency
Reference Frequency
provides a selection list of probe-specific calibration frequencies.
In addition, the input of any frequency is possible with a resolution of up to 1 kHz.
The last set value in MHz is always displayed, even if the frequency no longer matches
the probe after a probe change. Only when the calibration factor or the display in % of the
standard are activated is the frequency list updated by reading from the probe data and
set to the lowest value.