7.6 Dim
(1D, 2D or 3D measurement)
[Key 7]
The “Dim“ setting determines in how many dimensions you want to measure
magnetic fields: 1-dimensional, 2-dimensional or 3-dimensional (isotropic) mea-
surements are available. Naturally, measurements will be slower in 2D or 3D as
the number of sweeps (and therefore the total sweep time) necessary increa-
ses 2- or 3-fold to complete a measurement. However, units equipped with DDC
(Option 005) will be as fast in 2D as in 1D mode, as two channels can be used
simultaneously. Likewise, in 3D mode, sweep time is only double the normal
sweep time instead of triple without DDC.
Further related information can be found in “Measurement in 1D, 2D or 3D“.
7.7 VBW
(Video filter)
The so-called
Video filter
is intended for
optical
smoothing of the signal. The
lower the
Video filter
setting, the broader and “smoother” becomes the display
of the signal . Using this filter, you can mostly suppress unwanted noisefloors,
harmonics or sporadic peaks. However, with a low
Video filter
setting, the dis-
play can become less meaningful. In our example, there might be there
three
separate signals. However, the low video filter straightens these signals out to
become
one
single “smooth” signal. The alleged noise band around the signal
has also been “smoothed out”. Thus, when dealing with weak signals, the
Video
filter
should be used only at a higher setting.
7.8 SpTime
(Sampletime)
[Key 8]
Determines the
time per sample
. As a single sweep consists of several sam-
ples, total sweep time is a multiple of the sampletime. The higher the
sample-
time
setting, the more accurate the measurement, however, the longer it will
take. You can enter values either in
mS
(milliseconds) or
S
(seconds). Possible
values range from 0.001 to 999.9. The longer the Sampletime, the more accu-
rate the measurement.
Please note: The maximum usable sampletime in DFT mode is 5s. The
maximum sampletime in non DFT-mode is 240s.
Firmware V 1.0 / © 2005-2013 by Aaronia AG, D-54597 Euscheid, www.aaronia.com
25
VBW
=3Hz
VBW
=300Hz
7.0 The main menu
