National Semiconductor DS25CP104, User Manual

Page: 3 / 36

DS25CP104EVK User Manual
Overview
The DS25CP104EVK is an evaluation kit designed for demonstrating performance of
DS25CP104, a 3.125 Gbps 4x4 LVDS Crosspoint Switch with Transmit Pre-emphasis
and Receive Equalization. The evaluation kit is comprised of the DS25CP104 with its
associated input and output SMA connectors and jumpers to manually select the desired
pre-emphasis or equalization, a USB to SMBus conversion circuit to control the SMBus
with a PC, and three FR4 striplines (15” (38.1cm), 30” (76.2cm), and 60” (152.4cm) ) to
exercise the devices’ signal conditioning features (pre-emphasis and equalization).
The purpose of this document is to familiarize the user with the DS25CP104EVK, to
suggest test setup procedures and instrumentation to test the device optimally, and to
guide the user through some typical measurements that demonstrate the performance of
the DS25CP104 in typical applications.
Figure 1 . Photo of the DS25CP104EVK
Page 3 of 17