LTE SRS Measurement
R&S
®
CMW-KM5xx/-KS5xx
820
User Manual 1173.9628.02 ─ 16
Fig. 5-5: LTE SRS: Power Dynamics, FDD
The diagram shows the UE output power vs. time, sampled with 48 T
s
(1.5625 µs). The
trace covers the range from -1100 µs to +1298.4375 µs relative to the start of the SRS
symbol.
Transient periods are indicated by gray vertical bars in the diagram. They are excluded
from the measurement and have a width of 20 µs each. For TDD signals there are two
exclusion periods between the two SRS symbols.
The table below the diagram shows ON power and OFF power values:
●
ON Power
:
The ON power is the mean UE output power over the SRS symbol, i.e. over the
measurement period marked by a green horizontal bar in the diagram. In addition
to the mean value the table lists also the peak power within the measurement
period.
For TDD signals two SRS symbols are measured and separate RMS and peak ON
power results are provided for each SRS symbol.
●
OFF Power
:
The OFF power represents a mean power. It is determined before and after the
SRS symbol(s) within the following measurement periods:
–
OFF Power (before): 13 SC-FDMA symbols for FDD, 8 SC-FDMA symbols for
TDD
–
OFF Power (after): one subframe (FDD and TDD)
General Description
深圳德标仪器
135-1095-0799