Moving The Delta Marker Alone To Place It At A Reference Point - Agilent Technologies 4294A Operating Manual

Analysis and Processing of Result
Reading the difference from the reference point on the screen (delta marker)
Delta marker mode
Fixed delta marker mode (even if the
trace changes, the delta marker is
always fixed to a certain point on the
graph; you set its position with both
the sweep parameter value and
measurement parameter value)
When you select the delta marker mode, the delta marker (D) appears at the main marker
position on the trace.
NOTE Even if the fixed delta marker mode is selected, when you perform scale adjustment to
change the scales of the graph, the delta marker moves to the point having the same value
on the graph.
Even after you have placed the delta marker (D) at a point on the screen, you can move the
delta marker to the main marker position by pressing the mode selection key described
above.
The Delta Marker Mode menu provides a mode in which the delta marker and the main
marker move together; this is called the tracking delta marker mode (
key). This function must be used only during "Analyze trace bandwidth" on page 236. Do
not select it at this point.

Moving the delta marker alone to place it at a reference point

Follow these steps to move only the delta marker itself to a reference point.
Step 1. By following "Placing the delta marker on the reference point with the main marker" on
page 217, display the delta marker on the screen.
Note that you do not have to specify the main marker position in Step 2 this time.
Step 2. Press the
Step 3. Press the
Step 4. Select the parameter indicating the position of the delta marker you want to change from
the following.
Position parameter of delta marker
Sweep parameter value
Measurement parameter value (when
the measurement parameter is
COMPLEX Z-Y, the primary
measurement parameter value)
Secondary measurement parameter
value (can be set only when the
measurement parameter is
COMPLEX Z-Y)
218
key to display the Marker menu.
[Marker]
DMODE MENU key to display the Delta Marker menu.
Key operation
FIXED DMKR
Key operation
DMKR STIMULUS
FIXED DMKR VALUE
FIXED DMKR AUX VALUE
TRACKING DMKR
Chapter 8