Agilent Technologies 4294A Operating Manual page 199

(Trigger Source)" on page 111). Alternatively, you can use the continuous sweep mode by
implementing a free run trigger.
NOTE Marker-based level monitoring takes effect when you start a new sweep cycle after turning
on the test signal level monitor feature.
Step 4. Press the
it is not already displayed.
Step 5. Press the
Step 6. Activate the trace for which you want to monitor the signal level at the marker position.
Traces A and B are each associated with a field called "Marker Statistics/Trace Bandwidth
Analysis" that is used to display the signal level monitored at the marker position when the
corresponding trace is active.
To activate:
Trace A
Trace B
Step 7. To set up marker-based level monitoring, press one of the following keys:
To:
Turn off marker-based level monitoring
Monitor the test signal voltage level
Monitor the test signal current level
Step 8. Move the main marker to your desired measuring point on the trace. The Marker
Statistics/Trace Bandwidth Analysis field for the activate trace indicates the test signal
level monitored at the marker position.
NOTE Marker-based monitoring works using the same mechanism as, but provides level values in
higher resolution (more digits) than, real-time monitoring (described in "Monitoring the
Test Signal Level on a Real-time Basis" on page 189).
Although marker-based level monitoring uses separate display fields for Traces A and B, it
does not depend on the active trace, and provides the same level value regardless of which
trace is currently active. You can use Trace A's display field to monitor the test signal
voltage level while using Trace B's display field to monitor the test signal current level.
Also, you can use the display field for Trace A or B to monitor either the dc voltage bias
level or the marker-based dc current bias level, but not both. For more information on
marker-based dc bias level monitoring, refer to "Monitoring the dc Bias Level" on page
193.
The Marker Statistics/Trace Bandwidth Analysis field for each trace is used to display one
of three types of information: (1) the level value monitored at the marker position, (2) the
marker statistics, and (3) the results of trace bandwidth analysis; the parenthesized
numbers denote the precedence among these information types when more than one of
them are enabled at the same time.
Chapter 7
Setting Up the Display of Measurement Results
key to display the Utility menu. The main marker appears on the trace if
[Utility]
key to display the Level Monitor menu.
LEVEL MON [ ]
Monitoring the Test Signal Level (AC)
Press:
[A]
[B]
Press:
OFF
AC-V
AC-I
191