Gigahertz Solutions NFA 1000 Operating Manual page 24

Channel
Set Edge Criteria (experimental!)
This feature is new and its intention is to facilitate professionals the dicussion and
analysis of "dirty electricity" beyond today's definition. Activate "Edge Dispay" in the
menu option "View" to use this function.
This function allows you to define a threshold value with which a spike can be
marked directly in the "Edge Display" of the plot. This threshold can be selected in-
dividually for every channel. Standard values have been pre-selected as defaults.
between adjacent points in time by a user defined slope rate in V/m, mG or nT per
second. This is independent of the measuring intervals. A hypothetical interval of 1
second would give that increment. This permits to compare results recorded with
different recording intervals.
Absolute threshold = Marks a rise of the measured field intensity between adjacent
points in time by a user defined threshold level in V/m, mG or nT. Any rise beyond
this absolute threshold value will be marked.
The selected edge criteria will be graphically displayed on the top of the plotted data
section and will appear numerically in the field channel statistical data section under
edges per hour for that particular time span. All edge markings displayed appear in
real time and allow for a quick visual analysis.
When clicking the „ok" button, the selected criteria and the set value will be trans-
ferred into the statistical values of the channel. When re-accessing the menu option
"Set edge criteria", the pre-set values will again be displayed (under construction).
Select HF-Unit
This function will only be displayed when selecting „CH 4"in the „Channels" window
and the data recorded in this channel are those of
an external input device such as an HF-Analyser
(and are therefore recorded in mV). Upon selection
of this point of the menu the following window will
open up for a selection of the HF-Analyser settings
during the recording period.
nT <> mG
This function allows to subsequently convert a chosen channel's data from milli-
Gauss to nanoTesla and vice versa.
350-027_NFA1000400-6-2_EN-von-susanne as of October 2011
When clicking "Set edge criteria", the following win-
dow will open. Description:
Absolute increment = Marks a rise of the measured
field intensity between adjacent points of time by a
user defined absolute increment level in V/m, mG or
nT
Relative steepness = Marks a rise of the measured
field intensity between adjacent points in time by a
user defined factor or multiple.
Slope = Marks a rise of the measured field intensity
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