SNAU303A May   2024  – September 2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
  7. 2Hardware
    1. 2.1 Setup
      1. 2.1.1 Default Configuration of the LMH1239EVM
      2. 2.1.2 Hardware and Software: Description and Setup
        1. 2.1.2.1 SDI_IN1 Selected
        2. 2.1.2.2 SMBus/I2C Secondary Mode Configuration for the LMH1239EVM GUI
        3. 2.1.2.3 High Level Page for the LMH1239EVM GUI
        4. 2.1.2.4 Eye Monitor for the LMH1239EVM GUI
          1. 2.1.2.4.1 Register Map for the LMH1239EVM GUI
        5. 2.1.2.5 Scripting for the LMH1239EVM GUI
  8. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layout
    3. 3.3 Bill of Materials (BOM)
  9. 4Additional Information
    1. 4.1 Trademarks
  10. 5Related Documentation
  11. 6Revision History

1.1 Introduction

The LMH1239EVM is an evaluation module designed for high-speed performance and functional evaluation of the Texas Instruments LMH1239 12G UHD long reach cable equalizer with integrated reclocker and input mux.

With this kit, users can quickly evaluate the cable reach and output signal integrity supported by the LMH1239. High performance edge mount BNC connectors are used at the 75Ω port for the SDI_IN and SDI_OUT signals, while 100Ω differential output ports are routed to edge mount SMA connectors. These connectors facilitate connection to lab equipment or user systems for performance evaluation.

An onboard MSP430 MCU is included to support an optional SMBus or SPI serial control interface when configuring the LMH1239 operating modes.

  • LMH1239 features:
    • Dual adaptive cable equalizer at 75Ω single-ended input ports SDI_IN± and SDI_IN1±
    • Dual 100Ω output driver with de-emphasis output port OUT0± and OUT1±
    • Line-side reclocked 75Ω loop-through output on port SDI_OUT±