# :MEASure:JITTer:NOISe:TI?

Noise TI (1E-XX) Commands

- :MEASure:JITTer:NOISe:TI?
- :MEASure:JITTer:NOISe:TI:LEVel
- :MEASure:JITTer:NOISe:TI:STATus?
- :MEASure:JITTer:NOISe:TI:STATus:DETails?
- :MEASure:JITTer:NOISe:TI:STATus:REASon?

## Query Syntax

    :MEASure:JITTerN:NOISe:TI?

Where N identifies one of four possible jitter/noise analyses {1:4}. For example, `JITTer4`.

## Description

Returns the TI (p-p), Total Interference, which is the width of the one (or zero) level distribution at a low probability or symbol error rate (SER). The value is returned for the level specified by `:MEASure:JITTer:NOISe:TI:LEVel`.

TI is always measured at the same SER as the Eye Height measurement (see `:MEASure:JITTer:NOISe:EHEight?`). By default this is a SER of 1E-12 (1 x 10–12), which is a probability of occurrence of less than 1 part per trillion. You can change the SER setting to any value between 1E-6 to 1E-18 by changing the Probability/SER Level settings using the `:MEASure:JITTer:JITTer:EOPening` command.

The TI measurement is derived from the Deterministic Interference (DI) and Random Noise (RN) measurements. The DI and RN values are combined according to a dual Dirac model. This model is converted to a SER curve which is then evaluated at the desired SER to obtain the TI measurement.