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Calibrate receiver stress test signals for PCIe3

Posted: 12 Jan 2011     Print Version  Bookmark and Share

Keywords:receiver-stress signal  PCIe3  PCIe2 

This paper describes the calibration of the receiver-stress signal according to the base specification of PCIe3 to ensure interoperability. This differs in the following ways from what was common practice at lower data rates, e.g., for PCI Express rev. 2.0 (PCIe2):
- The specifications relate to a point within the RX, which makes post processing of the measured RX test signal necessary
- Accurate measurement of this test signal is not possible due to the noise floor of current real time oscilloscopes. Therefore, calibration of deliberately injected impairments is separated from the characterization of the test setup; and the RX test signal with the intended eye opening is constructed using a simulator software.
- Other parts of the PCIe3 RX test, such as the link training procedure, are not included in this paper as related procedures are not yet defined.

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