Anritsu Series MS278XB - Manual (Page 211)

Measurements Modulation Measurements
MS278XB OM 5-55
Below is a composite constellation along with the summary table. The composite constellation includes
the effects of all active codes as well as noise. If there was only one active code, the constellation would be
very simple—it would look like QPSK. As additional codes are added, the constellation gets more
complex. This constellation is of Test Model 2, which is a fairly simple signal where only 7 codes are
being transmitted out of a total possibility of 256 (or even 512) codes.
All of the summary measurements shown for QPSK are available. Additional summary measurements,
such as Peak Code Domain Error (a required measurement), Rho, and a variety of power measurements,
such as total power and the power in the Synchronizing channel (SCH) are also available. To perform a
composite measurement on the uplink signal, check Uplink on the Base Station/User Equipment button
in the WCDMA Graph Type dialog on the Composite tab.
Figure 5-32. Composite Constellation with Summary Table of a Test Model