HP 8712C, Руководство пользователя, Страница: 145 / 559

Using Instrument Functions
Using Markers
In marker delta mode, a reference marker is placed at the active marker
position. All marker values are then displayed in reference to this delta
marker. When the amplitude of the measurement trace changes, the
reference marker
also changes. The delta marker is represented by
a triangle pointing up (A) with a delta symbol (A) below it rather than a
number.
Limit testing can be performed on delta amplitude and delta frequency using
specific markers. See
Use Marker Limit Functions, later in this chapter.
follow along with this example, set up the instrument for a transmission
measurement of the that was shipped with your instrument.
Press Search to
move marker 1 (the active marker) to the maximum value on the trace.
Press Prior ON
to place a reference marker at the active marker position.
Press Prior to
place marker 1 to the minimum point on the trace.
4. The difference between the markers’ frequency and amplitude value is
shown in the upper-right corner of the analyzer screen.
Press Menu Prior 2: . Use the front panel knob to move
marker 2 towards the right-hand side of the display screen. Note that the
marker 2 values are also in reference to the delta marker.
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