User guide

Interference Channel Setup
Interference Channel Setup - Concepts
The optional Interference Channel module can be plugged into the instrument. For
an introduction please refer to “Interference Channel” on page 402.
This module is to be connected between the pattern generator's Data Out port and
the DUT. For installation instructions refer to “Installing Hardware Options -
Procedures” on page 536.
The Interference Channel simulates intersymbol interference (ISI). It has backplane
traces that conform to the Nelco 4000-6 FR4 specification.
The trace length can be set. According to the chosen length, the module generates
a reproducible amount of intersymbol interference.
The Interference Channel provides also a sinewave generator and a modulator. If
sinusoidal interference (amplitude modulation) is enabled, a minimum trace length
is used.
Data can be input at P1 or P2 by connecting the pattern generator's Data Out to
P1 or P2, respectively.
The output is meant to be connected to the input of the DUT.
C A U T I O N
The module has golden 2.4 mm connectors. Be sure to use the specific cables or
adapters. Improper connection can damage the module.
Interference Channel Setup - Procedures
To set up the Interference Channel module, click Interference Channel from the
Jitter submenu.
To use the Interference Channel module:
1
Click the checkbox that enables the module.
2
Select a trace (refer to the technical specifications for details)
3
If desired, enable sinusoidal interference.
Jitter Tolerance Tests 8
Agilent J-BERT N4903B High-Performance Serial BERT 431