CDMA2000 Measurements
R&S
®
CMW-KG8xx/-KM8xx/-KS8xx
735
User Manual 1173.9511.02 ─ 11
5.2.7.6
Multi Evaluation Detailed Views: Channel Phase Offset
The Channel Phase Offset (CPO) is the phase error between the Reverse Pilot Chan-
nel and the other code channels radiated by the MS. The CPO results are displayed in
bar graphs of the reverse physical channels of both the I and Q signal. Separate
graphs are available for the I-branch and the Q-branch of the signal.
Fig. 5-13: CDMA2000 multi evaluation: channel phase offset
The bar graphs show the phase offset of the individual code channels, identified by
their names and Walsh codes. Bars for active channels are displayed in blue, bars for
inactive/aliased channels are displayed in grey/purple. Depending on the display set-
ting, the bar graphs either show the current, average, or maximum phase errors.
All offsets are relative to the Reverse Pilot Channel (R_PICH W032, the first channel in
the I-Signal diagram) which is consequently displayed with zero phase error. The y-
axis covers a symmetric phase error interval around zero. Red lines above and below
the 0 level indicate active limit checks. In case of limit violations, the excessive offset is
displayed in red.
The description of statistical measurement results is covered in
Evaluation Detailed Views: Power, Modulation Quality"
For additional information refer to
5.2.7.7
Multi Evaluation Detailed Views: Channel Time Offset
The Channel Time Offset (CTO) is the timing error between the Reverse Pilot Channel
and the other code channels radiated by the MS. The CTO results are displayed in bar
General Description
深圳德标仪器
135-1095-0799