S820E UG PN: 10580-00343 Rev. H 9-11
High Accuracy Power Meter 9-3 General Measurement Setup Connection
Average Menu Options
If the displayed values are unstable, then increase the Running Average from
the default value of 1. Maximum value is 60. Increasing the running average
is useful when measuring unstable sources or when measuring near the
zero calibration level described below.
To monitor and record the maximum power level over time, set Max Hold to
On. The needle and numeric values display the maximum recorded value
until Max Hold is turned Off.
In Cont + Run mode (Figure 9-5), the power meter is continuously measuring
and updating the power reading. In Cont + Hold mode, the readings are
halted.
In Single + Run mode, the power meter performs the number of readings set
in Running Average (default is 1) and then places the instrument in Hold
mode. Changing the mode from Hold to Run initiates another series of
readings and then returns the instrument mode to Hold once again.
Calibration
Zero the sensor to remove any residual noise before making power
measurements. If frequent low-level measurements are being made, then
check the sensor zeroing often, and repeat as necessary. Before zeroing the
sensor, remove any RF input signal to the external sensor.
Zero Failure
This message appears if the zero operation is unsuccessful. The most common
reason could be the presence of RF power at the input of the sensor.
Double check to ensure that no RF signal is present at the input of the sensor,
and then try the zero operation again.
1. Press the Calibration main menu key and then press the Zero Sensor
key.
2. When the process is complete, “Zero Status Ok” is displayed in the
Measurement Settings Summary area.
3. Connect the sensor to the Device Under Test. The High Accuracy Power
Meter will now display the power level of the desired RF signal, with
the residual noise removed.
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