Agilent Technologies 4294A, Operating Manual

Page: 225 / 469

Chapter 8 217
Analysis and Processing of Result
Reading the difference from the reference point on the screen (delta marker)
8. A
nal
ys
is
a
nd P
roc
es
si
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of
Res
ult
Reading the difference from the reference point on the screen
(delta marker)
By placing the marker used as the reference at any point on the screen, you can set and
display the positions (sweep parameter value and measurement parameter value) of the
markers (main marker and sub-marker) based on relative values (differences) from the
reference point. This marker used as the reference is called the delta marker. You can
determine whether it will be placed on the trace (delta-marker-on-the-trace mode) or at any
point on the screen (fixed delta marker mode).
There are two ways to place (move) the delta marker at a reference point on the screen:
using the main marker or using the delta marker alone.
Placing the delta marker on the reference point with the main marker
Follow these steps to first move the main marker to a reference point and then place the
delta marker at that point.
Step 1. Activate the trace that you want to analyze.
Step 2. Using an appropriate function, such as the search function, move the main marker to the
point on the trace that you want to specify as the reference. For how to move the main
marker, refer to related topics including:
• “Specify the sweep parameter value and read the value on the trace” on page 212
• “Search the maximum/minimum measurements” on page 223
• “Search the point of target measurement” on page 225
• “Search the maximum/minimum peak” on page 228
Step 3. Press the
[Marker]
key to display the Marker menu.
Step 4. Press the
D MODE MENU
key to display the Delta Marker menu.
Step 5. Select the delta-marker-on-the-trace mode or the fixed delta marker mode.
Active trace Key operation
Trace A [A]
Trace B [B]
Delta marker mode Key operation
Delta-marker-on-the-trace mode
(when the trace changes, the delta
marker moves along with it; you set
its position with the sweep parameter
value only)
D
MKR