# Jitter/Noise Analysis Overview

Subtopics

- Jitter Decomposition Model
- Noise Decomposition Model
- Jitter Analysis Record Length Requirements
- Jitter/Noise Analysis Limitations

## Jitter Analysis

The EZJIT Plus Jitter Analysis Option adds RJ/DJ analysis capability to the original EZJIT jitter analysis option.

Jitter analysis is a methodology of decomposing jitter into different sub-components. Two of these sub-components are referred to as Random Jitter (RJ) and Deterministic Jitter (DJ).

Decomposing jitter into subcomponents not only provides useful diagnostic information about the measured jitter, but it also provides a method to estimate the total jitter (TJ) at bit-error rate levels that would be too low to measure directly. In addition to measuring RJ, DJ and TJ, the Jitter analysis software can also measure the following jitter sub-components:

- Data Dependent Jitter (DDJ peak-peak)
- Deterministic Jitter (DJ delta-delta)
- Duty Cycle Distortion (DCD)
- Inter-Symbol Interference (ISI peak-peak)
- Periodic Jitter Delta-Delta (PJ delta-delta))
- Periodic Jitter RMS (PJ rms)
- Bounded Uncorrelated Jitter Delta-Delta (BUJ delta-delta))
- Aperiodic Bounded Uncorrelated Jitter RMS (ABUJ rms)
- Random Jitter RMS (RJ rms)
- Total Jitter (TJ peak-peak)

Jitter analysis also provides graphical representations of these jitter sub-components.

See: Jitter Decomposition Model

## Noise Analysis

Noise analysis lets you evaluate the amplitude characteristics of high-speed digital signals. Noise analysis provides vertical analysis while Jitter analysis provides time base/horizontal analysis. Together, Jitter/Noise analysis gives you complete statistical analysis of signals.

Decomposing noise into subcomponents not only provides useful diagnostic information about the measured noise, but it also provides a method to estimate the Total Interference (TI) at bit-error rate levels that would be too low to measure directly.

See: Noise Decomposition Model