Compliance test fixture

Description

CBB

PCI Express Compliance Base Board for testing PCI Express add-in

cards

CLB

PCI Express Compliance Load Board for testing PCI Express

platforms

CBB2

Gen 2 PCI Express Compliance Base Board for testing PCI Express

add-in cards

CLB2

Gen2 PCI Express Compliance Load Board for testing PCI Express

platforms

CBB3

Gen 3 PCI Express Compliance Base Board for testing PCI Express

add-in cards

CLB3

Gen3 PCI Express Compliance Load Board for testing PCI Express

platforms

PCI Express bandwidth requirements by data rate for transmitter measurements

Data rate

Minimum bandwidth required

Minimum sample rate

2.5 GT/s

6 GHz

20 GSa/s

5 GT/s

12 GHz

40 GS/s

8 GT/s

12 GHz

40 GS/s

PCI Express sample rate requirements for reference clock measurements

PCIe standard

Minimum sample rate

1.1

20 GSa/s

2.x

20 GSa/s

3.x

20 GSa/s

Measurement Requirements

The PCI Express electrical performance

validation and compliance software

requires the E2688A high-speed serial

data analysis software, one of the PCI-SIG

approved compliance test fixtures (CBB

or CLB), and at least two SMA cables or

InfiniiMax active differential probes. The

N5393D optionally requires the InfiniiSim

waveform transformation toolset to enable

to de-embedding or de-convolving of

test fixture and cable losses based on

user supplied S-parameter descriptions

of these structures. Some of the

measurements cannot be made with the

PCI-SIG compliance test fixtures and may

require you to build or acquire a custom

test board, assembly, or other test fixture.

To purchase the PCI Express compliance

test fixtures, consult the PCI-SIG Web

site and select the PCI-SIG specification

order form link at: www.pcisig.com/

specifications/ordering_information

Bandwidth requirements for PCI

Express

PCI Express operates at 2.5 GT/s, 5 GT/s

and 8 GT/s. Below are two tables that

provide guidelines on the minimum

bandwidth and sample rate required for

PCI Express Transmitter measurements.

In addition to transmitter measurements,

phase jitter measurements of the PCIe

100 MHz reference clock also call for a

minimum sample rate used to measure

the clock as is also shown below. Use

this information to help you select the

proper oscilloscope for your specific

requirements.