Anritsu Series MS278XB operation manual MS278XB OM

Measurements Modulation Measurements

The following figure is an example of the single-code measurements. This is the Code Power vs. Slot overview looking at 1 Frame (15 slots). The optional Code Domain Power graph shows that the chosen code (#65 at spreading factor 256) is an active code since it is highlighted in blue. Two additional codes at the left are the pilot signal (P-CPICH) and the control channels (SCH & P-CCPCH), which is necessary for automatic measurements.

The top graph shows that the power level of this code varies with time. This is a simple example where the power varies in linear 5 dB steps from 0 dB (relative to the maximum) to –40 dB. Note that the markers read out either relative to the total power (shown here) or in absolute values (in dBm).

Note that the 2 key measurements of EVM (for this code) and Carrier Frequency Offset are shown at the top of the graph and that the scramble code is shown at the top of the CDP overview.

Note also that the CDP overview shows the power for the selected slot (in the Setup dialog); the default for this is slot #1, so the CDP for the selected code in the CDP overview is the same as the power in slot #1 of the upper graph.

Figure 5-34.Single Channel Code Power vs. Slot Overview with Code Domain Power Display

MS278XB OM 5-57