SLAA871 January   2019 AFE7422 , AFE7444

 

  1.   AFE74xx as a single-chip wideband repeater using loopback mode
    1.     Trademarks
    2. 1 Introduction
    3. 2 Repeater Mode (RX-TX Loopback With SerDes Bypassed)
      1. 2.1 Overview of the AFE74xx Repeater Mode
      2. 2.2 Configuration of the AFE74xx as a Repeater
      3. 2.3 Programming the Repeater Mode
        1. 2.3.1 Hardware Setup
        2. 2.3.2 Software Setup and GUI Configuration
    4. 3 130-MHz Digital Repeater System Overview
      1. 3.1 Key System Specifications
    5. 4 System Overview
      1. 4.1 Block Diagram
      2. 4.2 Design Considerations
      3. 4.3 Highlighted Products
        1. 4.3.1 LMK04828
      4. 4.4 System Design Theory
    6. 5 Hardware and Testing
      1. 5.1 Measured Latency and Gain
        1. 5.1.1 Hardware
        2. 5.1.2 Test Setup and Results
      2. 5.2 Measured Linearity Performance
        1. 5.2.1 Hardware and Test Setup
        2. 5.2.2 Test Results
      3. 5.3 Measured Selectivity (Out-of-Band Jammer)
        1. 5.3.1 Hardware and Test Setup
        2. 5.3.2 Test Results
    7. 6 Terminology

5.3.1 Hardware and Test Setup

A DAC38RF82 is used to generate two 20-MHz LTE carriers spaced at 100 MHz and centered at 1870 MHz. The LTE carriers simulate a 120-MHz wideband signal. A jammer signal is simulated by a CW tone produced by a SMA Rhode and Schwartz signal generator. A 350-MHz to 6-GHz, mini-circuits power splitter combines the wideband signal and CW tone to the input of the repeater. Figure 18 shows a block diagram of the setup.

slaa871-hardware-setup-for-jammer-simulation.gifFigure 18. Hardware Setup for Jammer Simulation