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3 Short-Range Comms & IoT Mode

3.2 Modulation Analysis Measurement

Decode Results

Decode Results shows the PER and decode bits results.

Example

:DISP:EVM:WIND:DATA DECR

sets the first window data to Decode Results

3.2.2.2 Format

This control enables you to choose the available format of the selected trace.

The formats are:

Format Name Description

Log Mag (dB) Data is converted to decibel units and shown on a linear Y axis

Linear Mag (Abs

Value)

Magnitude of the data is shown on a linear Y axis

Real (I) Real part of data is shown on a linear Y axis

Imaginary (Q) Imaginary part of data is shown on linear Y axis

I-Q Real part of data is shown on horizontal axis, imaginary part is shown on vertical axis, Independent

variable (X axis) is normal to display

Constellation Same as I-Q, but for data with symbols defined, only the symbol points are shown as dots with no

connecting lines

Phase Phase of complex data is shown on Y axis

I-Eye Real part of data is shown with X axis segmented (generally into 2 symbol segments) and each

segment is overlaid to show signal crossings at symbol boundaries

Q-Eye Same as I-eye but imaginary part of data is shown

Group Delay Useful for frequency response displays. Shows the derivative of phase response with respect to

frequency

Remote

Command

:DISPlay:EVM:WINDow[1]|2|...|6[:TRACe]:FORMat?

Example

:DISP:EVM:WIND2:FORM MLOG

sets the second window data format to Log Mag

:DISP:EVM:WIND2:FORM?

Notes Real, Imaginary, I-Q, Constellation, I-Eye and Q-Eye are available for IQ Meas Time and IQ Ref Time

trace

Log Mag, Phase and Group Delay are available for Channel Frequency Response trace

Preset Depends on trace

200 Short Range Comms & IoT Mode User's &Programmer's Reference

Keysight x-series Instruction Manual

Other manuals for Keysight x-series