NF FRA5087, Инструкция по эксплуатации

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4.6 Display setting
FRA5087
4-16
4.6.4 Setting markers
This instrument has a function of displaying markers in the graph, so that you can accurately read
measurement data and calculated data in the graph. The figures that have been read by markers
are displayed in the data display portion located in the top (upper) part of the graph on the screen.
The marker setting is done at the following sub-menus in the level lower from the menu
[Graph][FORMAT]:
[MARKER] : Markers are displayed on the screen at the [ON] setting.
[MARKER TYPE] : This is used to select marker types from the following.
[DATA] : Data marker. The marker moves along the data in the graph.
[LINE] : Line marker. Straight lines parallel to the x- or y-axis move in the graph.
The following descriptions apply to the status where the [MARKER] is set at [ON] and markers
are displayed on the screen.
a)
How to use data markers
There are two types of data markers: normal markers and delta markers. You can read the
gain difference or the phase difference between those at two different measurement
frequencies by using these markers.
The normal marker is displayed in “*”, and the delta marker is displayed in “
 ”. The mark
of “ ” is displayed together with the marker to indicate that the marker is active, which
means that the marker can be moved by knob actions (See
“Fig. 4-10 Data marker
display” ). When the  SET lamp is lit off, the normal marker is active; and when the
 SET lamp is lit on, the delta marker is active. Every time when you press the  SET key,
the 
SET
lamp is lit on and off alternatively.
The data marker operation depends upon the status of which marker, normal or delta marker,
is active.
 The normal marker is active (i.e.,  SET lamp is off):
Turn the knob and the normal marker moves along the data in accordance with the knob
action.
The data display portion of the screen displays the read out data that have been read by
the normal marker.
 The delta marker is active (i.e.,  SET lamp is on.):
Turn the knob and only the delta marker moves.
The data display portion of the screen displays the difference from normal marker data.