User`s guide

PCI Express 1.1 Software Clock Recovery (CR) Tool Overview
This tool is for use with the PCI Express 1.1 specification and uses a software clock recovery. This tool
does not use the hardware Clock Recovery. It will perform measurements using software algorithms to
determine the compliant clock characteristics.
The PCI Express specification identifies a test pattern to be used for all signal integrity tests. This pattern
is 40-bits long and is composed of the following bits: K28.5, D21.5, K28.5, D10.2 which is 0011111010
1010101010 1100000101 0101010101 in binary or 3eaaac1555 in Hex. This pattern is automatically
loaded into the PCI Express Compliance tool. If you want to use a different pattern, it can be manually
loaded into the tool by selecting the 'Pattern Options’ button and then selecting the 'Load Pattern' button.
You can load any of the standard compliance patterns saved on the
SIA-3000 or you can load a
pattern you've created using the "Known Pattern With Marker" tool.
Making a PCI Express 1.1 Software CR Measurement
Setup Directions
This tool does not use the hardware Clock Recovery. It will perform measurements using software
algorithms to determine the compliant clock characteristics.
• Connect the SIA-
3000 as shown below.
NOTE: If you have a continuous clock recovery option, you may set up the test as shown below.
© WAVECREST Corporation 2005 Section 4 - GigaView
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