Marker Menu; Delta Mode Menu - Agilent Technologies 8719D User Manual

With the use of a reference marker, a delta marker mode is available that displays both the
stimulus and response values of the active marker relative to the reference. Any of the five
markers or a fixed point can be designated as the delta reference marker. If the delta reference
is one of the five markers, its stimulus value can be controlled by the user and its response
value is the value of the trace at that stimulus value. If the delta reference is a fixed marker,
both its stimulus value and its response value can be set arbitrarily anywhere in the display
area (not necessarily on the trace).
Markers can be used to search for the trace maximum or minimum point or any other point
on the trace. The five markers can be used together to search for specified bandwidth cutoff
points and calculate the bandwidth and Q values. Statistical analysis uses markers to provide a
readout of the mean, standard deviation, and peak-to-peak values of ail or part of the trace.
Basic marker operations are available in the menus accessed from the w key. The marker
search and statistical functions, together with the capability for quickly changing stimulus
parameters with markers, are provided in the menus accessed from the (j-j key.

Marker Menu

The m key provides access to the marker menu. This menu allows you to turn the display
markers on or off, to designate the active marker, and to gain access to the delta marker menu
and the llxed marker menu.

Delta Mode Menu

...*
The delta reference is shown on the display as a small triangle A, smaller than the inactive
marker triangles. If one of the markers is the reference, the triangle appears next to the
marker number on the trace.
The marker values displayed in this mode are the stimulus and response values of the active
marker minus the reference marker. If the active marker is also designated as the reference
marker, the marker values are zero.
access to the fixed marker menu. This menu is used to set the position of a llxed reference
marker, indicated on the display by a small triangle A. Both the stimulus value and the
response value of the fixed marker can be set arbitrarily anywhere in the display area, and
need not be on the trace. The units are determined by the display format, the sweep type, and
the marker type.
menu, which puts a llxed reference marker at the present active marker position and makes
the marker stimulus and response values at that position equal to zero.
The softkeys in this menu make the values of the llxed marker the active function. The marker
readings in the top right comer of the graticule are the stimulus and response values of the
active marker minus the fixed reference marker. Also displayed in the top right comer is the
notation UEF=L
The stimulus value, response value, and auxiliary response value (the second part of a complex
data pair) can be individually examined and changed. This allows active marker readings that
are relative in amplitude yet absolute in frequency, or any combination of relative/absolute
readouts Following a ~~.~~ operation, this menu can be used to reset any of the fixed
marker values to absolute zero for absolute readings of the subsequent active marker values.
Application and Operation Concepts
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