Preparing The Test; Setting Up The Pattern Generator - Agilent Technologies BERT N4901A Getting Started

Preparing the Test

What Are We Testing?
The quickest way to familiarize yourself with the instrument is to set up a
short test. You can test the BER on a cable. All you need for this test is an
APC/RPC cable for the data port connection and an APC/RPC-SMA adapter
cable to connect the PG clock output to the ED clock input.

Setting up the Pattern Generator

First we need to set up the pattern generator.
To keep things simple, let's set up LVDS logic
levels for both the data and clock output.
You can change the output
signal parameters according
to the needs of your device.
4 6
1
Reset the instrument.
Check the values to
make sure you can't
damage your device.
4
Let's increase the
signal's data offset
by 100 mV. Just tip
the offset field,
Preset
Local
This sets all voltages
and parameters to
default values.
USB
3
Now select the logic
family LVDS for the data
and clock port.
5
and turn the fine-tuning
knob until you have the
desired value.
2
Switch to the
PG Setup.
The pattern generator's
output ports are always active.
Therefore, you must be sure that
your device can handle these
ranges before you connect it.