# :MEASure:DATA:NOISe:LDETection

Noise Commands

- :MEASure:DATA:NOISe
- :MEASure:DATA:NOISe:FAVorite
- :MEASure:DATA:NOISe:LDETection
- :MEASure:DATA:NOISe:LEVel
- :MEASure:DATA:NOISe:LOCation?
- :MEASure:DATA:NOISe:MLOCation
- :MEASure:DATA:NOISe:OCCurrences
- :MEASure:DATA:NOISe:SOURce
- :MEASure:DATA:NOISe:STATus?
- :MEASure:DATA:NOISe:STATus:DETails?
- :MEASure:DATA:NOISe:STATus:REASon?
- :MEASure:DATA:NOISe:UNITs
- :MEASure:DATA:NOISe:UREFerence:STATe
- :MEASure:DATA:NOISe:UREFerence:VALue

## Command Syntax

    :MEASure:DATA:NOISe:LDETection {UPATtern | UTHResholds}

## Query Syntax

    :MEASure:DATA:NOISe:LDETection?

## Description

For the `:MEASure:DATA:NOISe` measurement, this command specifies the level detection method:

- `UPATtern` — (Use Pattern) Use this method when the serial data has a pattern that can be detected or is known.

  When no pattern is found, the measurement results will be questionable.

- `UTHResholds` — (Use Thresholds) Use this method when data is random and no pattern can be detected or when there is not enough data to detect the pattern or identify a known pattern.

In cases where noise crosses the threshold (like with a closed or closing data eye), using a pattern that is known (or loaded from a file) lets level 0 noise and level 1 noise be properly measured, and the measurement results show that noise is closing the eye. When using thresholds, noise crossing the threshold is counted for the wrong level, making the measurement results incorrect, without any indication other than maximum values on level 0 and minimum values on level 1 being limited by the threshold.

When the data eye is open, both level detection methods give accurate results.