R&S SMA100B - Page 250

Improving level performance
R&S
®
SMA100B
250User Manual 1178.3834.02 ─ 09
2. Select power sensor indication located at the bottom of the dialog.
3. To access the trace settings, select the respective "Trace x" tab.
The measurement data can be current (sensor trace) or stored trace data. You can
store data either in a file (reference trace) or in a temporary memory (hold trace). Up to
four traces can be indicated at one time. On connection, the sensors are automatically
detected and assigned to a trace. By default, connected sensors are assigned to the
traces in ascending order, that means sensor 1 to trace 1, sensor 2 to trace 2, etc. If
the default trace is already used, the sensor has to be assigned manually in the trace
dialog.
Using the reference and hold traces, you can compare traces. Assign a reference
curve to one trace and your measured values to a second one, and switch on the dis-
play. With this feature you can compare results directly in the graph, or show the devia-
tions in a graph by using the "Mathematics - Trace Power Analysis" on page 251 func-
tion.
Example
The current single measurement of sensor 2 which is assigned to trace 2 is used as
reference trace.
1. Select "Trace 2" with "Indication" = "2 - NRP-Z81".
2. Select "Save To Ref".
3. Select "Trace 1" > "Indication > Ref".
4. Select "Diagram".
The R&S SMA100B indicates two identical traces.
5. Select "Start single".
Triggers a new measurement cycle with sensor 2. You can compare the resulting
measurement trace with the former measurement, which is displayed as reference
trace.
Using power sensors