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SD384EVK

LMH0384 Evaluation Board

User Guide

National Semiconductor

EVK User Manual

Gary Melchior

September 11, 2009

Overview

The SD384 Evaluation Kit (EVK) enables evaluation of the LMH0384 3G/HD/SD SDI Adaptive Cable Equalizer.

Evaluation Kit (SD384EVK) Contents

The EVK contains the following parts:

• SD384EVK board assembly with the LMH0384 cable equalizer

• SD384EVK User Guide

Evaluation Board Description

Figure 1 shows the SD384 evaluation board and highlights some of its features.

Figure 1. SD384 Evaluation Board

SD384 EVK User Guide 1 of 5

Summary of content (6 pages)

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SD384EVK LMH0384 Evaluation Board User Guide National Semiconductor EVK User Manual Gary Melchior September 11, 2009 Overview The SD384 Evaluation Kit (EVK) enables evaluation of the LMH0384 3G/HD/SD SDI Adaptive Cable Equalizer. Evaluation Kit (SD384EVK) Contents The EVK contains the following parts: • SD384EVK board assembly with the LMH0384 cable equalizer • SD384EVK User Guide Evaluation Board Description Figure 1 shows the SD384 evaluation board and highlights some of its features. Figure 1.
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SDI Input and SDO Output The SDI input connector (J1) is a 75Ω BNC connector. The SDI input should conform to the SMPTE 424M, SMPTE 292M, or SMPTE 259M standards. The SDO output connectors (J2 and J3) are 50Ω SMA connectors. When using only one side of the output pair, the other side should be terminated with a 50Ω SMA termination. For example, when only using the SDO output, ¯¯¯¯ SDO should be terminated with a 50Ω SMA termination.
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BYPASS (JP7) JP7 allows control of the equalization BYPASS function. To put the device into bypass mode, set the jumper to pull BYPASS to VCC. To turn off bypass (for normal operation) set the jumper to pull BYPASS to GND. The LMH0384 BYPASS pin has an internal pulldown (to disable bypass), so JP7 may be left unconnected for normal operation. AUTO SLEEP (JP8) JP8 allows control of the AUTO SLEEP function.
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Figure 5. SD384 Output Waveform at 2.97 Gbps with 110m Belden 1694A Cable Bill of Materials Reference Designator C1, C7, C8 C2, C3, C4 C5, C6, C14, C16, C17 D1 J1 Qty 3 3 5 1 1 Description Capacitor, 4.7uF, 6.3V, X5R, 0603 Capacitor, 1uF, 6.3V, X5R, 0402 Capacitor, 0.1uF, 16V, X5R, 0402 LED, Green, 0603 BNC, Amphenol, 75-ohm, edge launch J2, J3 JP1, JP2, JP3, JP4, JP7, JP8 JP5 JP6 JP9 L1 2 6 1 1 1 1 PS1, PS2 R1, R2 R5 R4 2 2 1 1 SMA, 50-ohm, edge launch Header, 3x1, 0.1" Header, 2x1, 0.
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GND PS2 2 1 PS1 2 1 SDI J1 C1 4.7uF Z75_1 BNC_EDGE C14 0.1uF L1 5.6nH 2 C16 0.1uF C15 open R1 75 JP2 1 2 3 VCC C17 0.1uF GND C2 1uF C3 1uF BYPASS CD GND R5 37.4 Z75_2 R2 75 HDR_3 VCC GND Z75_3 Z75_4 JP3 1 2 3 HDR_3 R4 300 C5 0.1uF CD GND CD D1 JP6 1 3 5 VEE SDI SDI SPI_EN 3 VCC C4 1uF JP4 1 2 3 HDR_3 GND VCC GND GND JP7 1 2 3 HDR_3 BYPASS C6 0.
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