HP 8753E manual IMarker Menu, Marker type

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 ilxed 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 all or part of the trace.

Basic marker operations are available in the menus accessed from the m 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 C~arker) key.

IMarker Menu

The B 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 hxed marker menu.

Delta Mode Menu

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The ~~~~~~~,l’~~ softkey within the marker menu provides access to the 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.

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Fixed m&r Menu. me ~~~~~~~~~~~ softkey fitb the delta mode menu provides :..:::;.;;;;....z;;... i .i........*>...;;.......w; .....~:::::: . . ..<..:: ..: i:..ii:::>>

access to the ilxed marker menu. This menu is used to set the position of a fixed 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.		.:::...:.:.::”	..:~.... .............. ;~......;.........;...........~	;...	....,.,.,.,.,....; ::: : ::.. .;:::g; /)~;,::,:~,:,~;.,.,~,~,~,~,~,~,~,~,.,~,~,~,~,.,
There we two ways to turn on the tied ma&y. ()ne way is with the x.‘~~:~~~~~~~~~
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softkey in the delta marker menu. The other is with the ~~~ function in the marker

menu, which puts a fixed 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 fixed 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 tied reference marker. Also displayed in the top right comer is the notation AIlEF=A.

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. Foflowing a ~~~ operation, this menu c~ be used to reset any of the tied

marker values to absolute zero for absolute readings of the subsequent active marker values.

Application and Operation Concepts 6-66