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WCDMA PRACH Measurement
R&S
®
CMW-KG4xx/-KM4xx/-KS4xx
857
User Manual 1173.9657.02 ─ 11
Fig. 5-10: WCDMA PRACH: I/Q constellation diagram
All samples in the preamble are evaluated, excluding a 25 µs guard period at the
beginning and end of the preamble. Thus 3904 points are displayed.
PRACH preambles are QPSK modulated, so that the points are grouped in four spots,
ideally located on a circle around the origin, with relative phase angles of 90 deg.
See also: "I/Q Constellation Diagram" in the R&S
CMW user manual, chapter "System
Overview"
5.2.7.4
Detailed Views: UE Power and Power Steps
Each of the detailed views shows a bar graph or diagram and a table of results per pre-
amble.
General Description
深圳德标仪器
135-1095-0799