# :CHANnel:EYE:WINDow:LEFT

:CHANnel EYE Commands

- :CHANnel EYE Commands
- :CHANnel:EYE:BITS
- :CHANnel:EYE:CCOunt
- :CHANnel:EYE:CURSor
- :CHANnel:EYE:CWINdow
- :CHANnel:EYE:DISPlay
- :CHANnel:EYE:PATTern
- :CHANnel:EYE:UIXPosition
- :CHANnel:EYE:UIXRange
- :CHANnel:EYE:UUNits
- :CHANnel:EYE:WINDow:COPY
- :CHANnel:EYE:WINDow:LEFT
- :CHANnel:EYE:WINDow:METHod
- :CHANnel:EYE:WINDow:RIGHt
- :CHANnel:EYE:WINDow:TRACking
- :CHANnel:EYE:WINDow:WIDTh
- :CHANnel:EYE:XPOSition
- :CHANnel:EYE:XSCale

## Command Syntax

    :CHANnelN:EYE:WINDow:LEFT  <percent>

Where N identifies a specific channel in the form "<connection1-8>_<ch1-8>". With connection 1, the connection number part (that is, "1_") is optional, and you can simply use the channel number "<ch1-8>". For example, connection 4 channel 2 is `CHANnel4_2`.

<percent> is a double.

## Query Syntax

    :CHANnelN:EYE:WINDow:LEFT?

## Description

When the "Eye Opening" eye window determination method is selected (see `:CHANnel: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 `:CHANnel:EYE:WINDow:RIGHt` command.

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