82 Keysight M8194A 120 GSa/s Arbitrary Waveform Generator User Guide
3 M8194A Soft Front Panel
• File…
Opens a correction file selection dialog box. Default file extension is
CSV (Comma-Separated Values). The name of the successfully loaded
correction factors file is shown in the field located at the left of this
button. The accepted format for correction files may be found in the
Correction File Format section. In particular, adaptive equalizer models
obtained through the Keysight 89600 VSA software can be imported
through this procedure to compensate for linear distortions added by
any intermediate component, PCB trace, or cable. To obtain this model,
apply a NRZ signal with sufficient bandwidth to an 89600 equipped
oscilloscope and export the resulting equalizer model. Isolated pulse
characteristics of the waveform must be known by the 89600 software
so it is advisable to calibrate the SUT (System Under Test) using a
Raised-Cosine signal with alpha = 1 to maximize the nominal
bandwidth for a given bit rate. The 89600 software must be set up to
analyze a BPSK signal with the same baud rate and baseband filter
characteristics.
• CH1 Skew / CH2 Skew / CH3 Skew / CH4 Skew
These numeric fields can be used to set-up the absolute delay for each
channel in seconds. The valid range for them is -100ps … +100ps. This
feature may be used to control the skew of data and clock signals.
Additional Waveform Parameters Section
• Waveform Length
This field is an indicator only. Its length is in samples of the resulting
segment.
• Max. Length
Maximum waveform length should be used to force the resulting
waveform to be shorter or equal to a limit set by the user.
• Keep Sample Rate
This check box preserves the sampling rate to a user-defined value
irrespective of any other defined signal parameter. Keeping the
sampling rate to a fixed value may be necessary when multiple
waveforms are created for usage in a sequence or scenario. By default,
this check box is selected. The “Set WL to Max” check box gets
activated when this check box is selected.
• Set WL to Max
This check box is only available when “Keep Sample Rate” is selected.
When this option is selected, the waveform calculation algorithm
always takes the maximum waveform length as defined in the “Max.
Wfm. Length” field. As the waveform length must always be identical
for all four channels, it is recommended to check the “Set WL to Max”
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