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CP-STGX05-01 Measurements of Pre-Emphasis on Altera ® Stratix ® GX with the BERTScope 12500A

By Guy Foster and Director Of Marketing

Abstract

This paper gives a brief overview of signal integrity measurements made with the Stratix GX device from Altera. It gives quantifiable measurement of the effectiveness of the pre-emphasis function that is available on the Stratix GX family. It employs Eye Diagram, Jitter and BER Contour functions of the BSA 12500A to reveal the part’s performance. Features of the Arrow/Altera Stratix GX Evaluation Board The Altera part may be evaluated on several different boards. The one used here, from Arrow Electronics, provided the following features: � 4 electrical transmitters, 4 electrical receivers � Ability to run at 2.50 or 3.125 Gb/s � Internal clocking, or facility to use an external clock at ÷16 or ÷20 of the data rate. � Transmitter variable output amplitude from 400 – 1600mV in increments � Pre-emphasis and equalization can be added in increments (0 to 5) � Several test lengths of FR4 to act as channels to demonstrate the effectiveness of pre-emphasis. � PRBS patterns PN7 to PN23 and simple predetermined RAM patterns. � Easily installed USB control software with straight forward GUI. In this paper, the measurements were made using a PN7 pattern at 2.5 Gb/s. The evaluation board i

Year: 2005
OAI identifier: oai:CiteSeerX.psu:10.1.1.192.1336
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