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Chapter 9 121
W-CDMA Measurement Application
Conformance with 3GPP TS 25.141 Base Station Requirements
6.7.3 Time alignment error in Tx
Diversity (Modulation
Accuracy)
±26 ns (95%)
[= 0.1 Tc]
±1.25 ns (100%)
a. Those tolerances marked as 95% are derived from 95th percentile observations with 95% confidence.
b. Those tolerances marked as 100% are derived from 100% limit tested observations. Only the 100% limit
tested observations are covered by the product warranty.
c. The computation of the instrument tolerance intervals shown includes the uncertainty of the tracing of
calibration references to national standards. It is added, in a root-sum-square fashion, to the observed
performance of the instrument.
d. These measurements are obtained by utilizing the code domain power function or general instrument
capability. The tolerance limits given represent instrument capabilities.
e. The tolerance interval shown is for the peak absolute power of a CW-like spurious signal. The standards
for SEM measurements are ambiguous as of this writing; the tolerance interval shown is based on Agi-
lent’s interpretation of the current standards and is subject to change.
Sub-
clause
Name 3GPP Required
Test Instrument
Tolerance
(as of 2006-03)
Instrument
Tolerance
Interval
abc
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