LTE PRACH Measurement
R&S
®
CMW-KM5xx/-KS5xx
753
User Manual 1173.9628.02 ─ 16
For a description of the lower rows see
chapter 4.2.9.9, "Common View Elements"
4.2.9.4
Detailed Views: I/Q Constellation Diagram
This "single preamble" view shows the modulation symbols as points in the I/Q plane.
Fig. 4-11: LTE PRACH: I/Q Constellation diagram
The typical constellation diagram of a random access preamble shows 839 points (pre-
amble format 4: 139 points) evenly distributed on a circle around the origin. The I/Q
amplitudes correspond to the values that the R&S
CMW uses for the EVM calculation:
A possible I/Q origin offset is already subtracted out.
See also: "I/Q Constellation Diagram" in the R&S
CMW user manual, chapter "System
Overview"
For additional information refer to
chapter 4.2.9.9, "Common View Elements"
4.2.9.5
Detailed Views: Power Dynamics
This "single preamble" view shows a diagram and a statistical overview of related
power results.
General Description
深圳德标仪器
135-1095-0799