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Differential Interface Electrical Characteristics
Copyright © 2008 Marvell Doc. No. MV-S104859-U0 Rev. E
December 2, 2008, Preliminary Document Classification: Proprietary Information Page 121
8.7.2.2 PCI Express Interface Test Circuit
Figure 43: PCI Express Interface Test Circuit
When measuring Transmitter output parameters, C_TX is an optional portion of the
Test/Measurement load. When used, the value of C_TX must be in the range of 75 nF to 200 nF.
C_TX must not be used when the Test/Measurement load is placed in the Receiver package
reference plane.
Test Points
C_TX
50 ohm50 ohm
C_TX
+-
D+
D-