GUI Reference
R&S
®
CMW-KM750/-KM751
41
User Manual 1173.9670.02 ─ 05
No. of Subframes
Defines the number of consecutive subframes (7 timeslots per subframe) that form a
single measurement interval, also called "Measurement Length". The measured sub-
frames can be displayed in the following diagrams: "Error Vector Magnitude", "Magnitude
Error", "Phase Error", "CDE Power" and "Code Domain Power".
See also
chapter 3.1.3, "Defining the Scope of the Measurement"
Remote command:
Preselected Slot
Selects the uplink slot to be used for single slot measurements, including ACLR and
spectrum emission.
See also
chapter 3.1.3, "Defining the Scope of the Measurement"
Remote command:
Scalar Slot
Selects a particular slot within the "Measurement Length" where the R&S
CMW displays
the statistical measurement results. These results are measured for all slots and can be
displayed for one slot at a time.
See also
chapter 3.1.3, "Defining the Scope of the Measurement"
Remote command:
Subframe Offset
Allows to compensate a subframe number mismatch for RX measurements. There are
four subframes in a TTI, so the subframe numbers are 0 to 3. Specify the number of the
subframe that contains the data expected in subframe number 0.
Example: The expected subframe numbers are 012301230123 and so on. If the UE loops
back the data using the subframe numbers 230123012301 instead, specify a subframe
offset of 2 to compensate the mismatch.
Remote command:
Analysis Mode
Defines whether a possible origin offset is included in the measurement results or sub-
tracted out. The analysis mode affects the EVM, magnitude and phase error results.
See also: "I/Q Offset, I/Q Imbalance, Waveform Quality" in the R&S CMW user manual,
chapter "System Overview"
●
With Origin Offset:
The results for the EVM, phase error and magnitude error include a possible origin
offset. This mode conforms to 3GPP specifications.
●
No Origin Offset:
The origin offset is subtracted out.
Remote command:
Parameters and Settings
