Msr Conformance Evm Measurement Concepts - Keysight X Series Measurement Manual

Concepts
MSR Measurement Concepts

MSR Conformance EVM Measurement Concepts

Purpose
The Conformance EVM measurement (CEVM) analyzes characteristics of MSR
carriers which consist of various radio formats. This measurement measures all
configured carriers at one measurement cycle (assuming all configured carriers
are active and output power level is not dynamically changed throughout the
acquisition). The aim of this measurement is to optimize the measurement
speed.
Measurement Method
All available measurement parameters are accessible through RUI (SCPI).
CEVM doesn't have softkeys for setting parameters except for some common
keys. Basically it has one view: Result Metrics view.
Currently, the following measurement items are supported in this
measurement.
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Although the core functionalities of these measurement items are almost the
same as the original measurements, the measurement algorithm and items of
the results are tailored for the speed and therefore, some functionalities and
results are excluded or limited. See
page
Differences from Original Measurement
Functions are almost the same as the original measurement; however, some
features are different between the original measurement and this measurement
as shown below.
GSM/EDGE EDGE EVM
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available.
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this measurement.
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EDGE EVM in the GSM/EDGE mode
Mod Accuracy in the W-CDMA mode
Conformance EVM in the LTE FDD mode
Conformance EVM in the LTE TDD mode
Mod Accuracy (Composite Rho) in the cdma2000 mode
Mod Accuracy in the TD-SCDMA mode
Forward Link Mod Accuracy (Waveform Quality) in the 1xEV-DO mode
69.
No graphical view (such as I/Q Measured Polar Graph, I/Q Error, Data Bits)
No limit judge functionality.
Some SCPI commands in the original measurement are not available in
"Format Parameter List in Mode Setup" on
Keysight N9083A & W9083A Measurement Guide