Dim (1D, 2D Or 3D Measurement); Vbw (Video Filter); Sptime (Sampletime) - Aaronia NF-5030S Manual

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7.0 The main menu

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".

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.

VBW=3Hz

VBW=300Hz

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.

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