3. Executing the Measurement and Viewing Results

Here, only measurement procedure for typical measurement system is provided as an example.

Executing the measurement

To execute the measurement,

1. Click the triangle Run button on the menu bar and tool bar.

   

2. Once the measurement begins, the detailed information will be displayed in the Log view at the bottom of the window as shown below.

   

   During the running process, you can stop it any time by clicking the Stop button. When you see the "Complete!" message in the Log view, it indicates that the measurement is completed.

   

Viewing the Measurement Results

In the measurement view, there are four result windows: AM-AM, AM-PM, ACP, and EVM vs. Power. In the EVM vs. Power measurement, the EVM vs. Power results are viewed. To view more detailed information, double-click on the EVM vs. Power window to enlarge it.

You can click on the button below X-axis to change the X-axis value to the output power of the PA.

Figure 1 and figure 2 show the EVM vs. Power results with DPD on and DPD off. When DPD is on, the EVM results are relatively flat for different power levels. When DPD is off, the EVM results deteriorate fast with the increase of the power level.

Figure 1 EVM vs. Power with DPD On

Figure 2. EVM vs. Power with DPD Off