R&S CMW-KG4 Series, User Manual, Page: 561 / 988

WCDMA Multi Evaluation Measurement
R&S
®
CMW-KG4xx/-KM4xx/-KS4xx
561 User Manual 1173.9657.02 ─ 11
For the phase discontinuity 3GPP defines different requirements for signals with and
without HSPA channels:
●
For signals without HSPA channels the phase discontinuity measured between any
two adjacent slots shall be less than or equal to 36°. If a phase discontinuity mea-
surement is greater than 36° then the next four measurements shall be less than or
equal to 36°. No measurement shall exceed 66°.
●
For signals with HSPA channels, the phase discontinuity must not exceed 36°. This
limit must be checked at two specific measurement points of the transmitted UE
on/off pattern. The pattern that must be transmitted by the UE is the same as for
the HS-DPCCH Power Step measurement, test case "TPC 0 dB" (see
chap-
ter 3.2.5.3, "Power Control Limits" , on page 564).
For a measurement conform to 3GPP use the default measurement positions (0.5
slots and 10.5 slots). Trigger the measurement using the HS-DPCCH trigger
offered by the WCDMA generator or an external trigger one half-slot before the
pattern starts with the DTX > ACK/NACK boundary.
According to 3GPP the same measurement points can be used for the EVM limit
check. However the R&S
CMW checks the limit for all EVM results.
The configuration dialog provides separate phase discontinuity limit sets for signals
with HSPA channels ("Phase Disc. HS-DPCCH") and without HSPA channels ("UE
Phase Discontinuity"). Which limit set is active depends on the selected measurement
period. A half-slot measurement is suitable for signals with HSPA channels (option
R&S CMW-KM401 required), a full-slot measurement for signals without HSPA chan-
nels. See also parameter
"Measurement Period" on page 596.
Fig. 3-5: Modulation limit settings
The table below lists the test requirements of 3GPP TS 34.121.
General Description
深圳德标仪器
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