# :CHANnel:EYE:PATTern

: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:PATTern <pattern_string>

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`.

<pattern_string> is a 16-character string containing symbol values in the pattern.

## Query Syntax

    :CHANnelN:EYE:PATTern?

## Description

When qualifying a real-time eye with symbols in a pattern (see `:CHANnel:EYE:BITS`), this command specifies the symbol pattern.

- For typical NRZ (non-return-to-zero) signals, the levels are "1", "0", or "X". A valid pattern, for example, could be "1010X110X100X010".
- For PAM-4 (four-level) signals, the levels are "3", "2", "1", "0", or "X". A valid pattern, for example, could be "0123X032X021X013".

To specify which symbol position in the pattern is symbol 0, see the `:CHANnel:EYE:CURSor` command.