Using Awg Frequency Response Calibration For Improved Signal Performance; Selecting Line Coding - Keysight Technologies M8000 Series User Manual

Using AWG Frequency Response Calibration for Improved Signal Performance

Selecting Line Coding

Keysight M8000 Series of BER Test Solutions User Guide
Keysight recommends performing signal calibration within the AWG
system (M8195A/M8196A) for DUT testing.
In other words, the specific channel of the AWG must be calibrated with
specific cables and connectors that are used between the AWGs DATA
OUT and the DUTs RX port.
To perform the phase/frequency response calibration, you require a
DCA-X and DCA-M sampling scope with a receiver module above 30 GHz.
Alternatively, you may use a DSA-Z series real-time scope, which is
capable of signal analysis above 30 GHz. Generally, a better signal quality
is achieved when this calibration is performed using a sampling scope as
compared to the calibration performed using a real-time scope.
A S-Parameter file is generated as a result of performing this calibration
using IQTools, which can be imported as a De-Embedding filter into the
M8070A software. For details on how to perform these steps, refer to
IQToolsPhaseFrequencyResponseCalibration.pdf, which is available within
the M8070A documentation folder.
You can define the line coding for a M8195A/M8196A Data Out port
through the Parameters window. The M8195A/M8196A Data Out port
supports NRZ and PAM4 line coding.
Make sure to use the similar line coding of all Data Out ports assigned to
NOTE
the same sequence of M8195A/M8196A. An "Auto Correction" window
will appear if you select different line coding. Clicking on the "Allow"
button present on this window, applies the same line coding on all
Data Out ports.
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