:CMODe:EYE:WINDow:LEFT

:CMODe EYE Commands

Command Syntax

:CMODeN:EYE:WINDow:LEFT  <percent>

Where N identifies a specific common-mode waveform in the form "<connection1-8>_<ch1|ch3|ch5|ch7>". With connection 1, the connection number part (that is, "1_") is optional, and you can simply use the channel number "<ch1|ch3|ch5|ch7>". When two channels are paired to create a differential waveform and a common-mode waveform, the odd-numbered channel is used when specifying the waveform. For example, connection 5 common-mode waveform 3 (from the pairing of channels 3 and 4) is CMODe5_3.

<percent> is a double.

Query Syntax

:CMODeN:EYE:WINDow:LEFT?

Description

MEASUREMENTS AFFECTED

Infiniium uses the eye boundaries during these measurements:

  • Eye Amplitude
  • Crossing %
  • Duty-Cycle Distortion
  • Eye Height
  • Signal to Noise Ratio
  • One Level
  • Zero Level

When the "Eye Opening" eye window determination method is selected (see :CMODe:EYE:WINDow:METHod), this command sets the percentage of the symbol period (time) for the eye window's left side. This setting determines what portion of the eye diagram is used to generate histograms for eye diagram amplitude measurements.

The default values of 40% (left) and 60% (right) which identifies the central 20% of symbol period.

To set the eye window's right side, use the :CMODe:EYE:WINDow:RIGHt command.

This command is equivalent to the settings in the Eye tab of the Configure Measurements dialog box.