Gigahertz Solutions NFA 30M Operating Manual page 14

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Select the menu option View/Edge Display to activate the edge display.
The edge display option will help find important field strength fluctua-
tions. Steep edges are marked in the diagram in the colour corre-
sponding to each channel – the marked channel will be bolded, the
others won't. This way you will always have an overview of what's go-
ing on in the other channels, even if your focal point is, for instance, the
3D-value. The threshold value for an edge display can be defined in the
menu option "Channel/Set edge criteria".
"Set Times"
Choose the "Set Times" option to scale the graphic to a defined time
segment.
"Y-Scale"
Automatic – The y-axis will be scaled automatically to give the best

display of the area selected for analysis.
Manual – The y-axis scaling can be manually controlled in this

mode. Allows for and will assist in analyzing small values (e.g. those
over 2 kHz) overshadowed by other very strong field intensities.
"All"
zooms out the x-axis and displays the complete data set on the data
plot. Alternatively, the keyboard "A" keys can be used.
If you prefer, use the arrow-keys to take over the functions of the
mouse.
Channel
Set Edge Criteria (experimental!)
This feature is new and its intention is to facilitate professionals the dis-
cussion and analysis of "dirty electricity" beyond today's definition. Ac-
tivate "Edge Display" 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 individually for every channel. Standard values have
been pre-selected as defaults.
April 2020
When clicking "Set edge criteria", the
window shown on the left opens. De-
scription:
Absolute increment = Marks a rise of
measured field intensity between ad-
jacent points of time by a user de-
fined absolute increment level in V/m,
mG or nT
Relative increment = Marks a rise of
measured field intensity between ad-
jacent points in time by a user de-
fined factor or multiple.
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