SNAU308A November   2024  – May 2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Setup
      1. 2.1.1 Evaluation Setup Requirement
      2. 2.1.2 Connection Diagram
    2. 2.2 Jumper Information
    3. 2.3 Power Requirements
    4. 2.4 Reference Clock
    5. 2.5 Output Connections
    6. 2.6 Test Points
  9. 3Software
    1. 3.1 Software Description
    2. 3.2 Software Installation
    3. 3.3 USB2ANY Interface
  10. 4Implementation Results
    1. 4.1 Evaluation Setup
    2. 4.2 Performance Data and Results
      1. 4.2.1 RF Output
      2. 4.2.2 VCO Calibration
        1. 4.2.2.1 No Assist Operation
        2. 4.2.2.2 Full Assist Operation
      3. 4.2.3 SYSREF
        1. 4.2.3.1 SYSREF Clock Generation
        2. 4.2.3.2 SYSREF Pulse Generation
        3. 4.2.3.3 SYSREF Repeater Mode
      4. 4.2.4 Phase Adjustment
      5. 4.2.5 Phase Synchronization
        1. 4.2.5.1 Category 1b and Category 2 SYNC
        2. 4.2.5.2 Category 3 SYNC
      6. 4.2.6 Pin Mode
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Debug Information
    2. 6.2 Trademarks
  13. 7Revision History

SYSREF Repeater Mode

There are two type of SYSREF repeater mode operations, synchronous and asynchronous repeater mode. With synchronous repeater mode, incoming SYSREF clock is re-clocking to align with the VCO, SYSREF delay control is supported. With asynchronous repeater mode, incoming SYSREF clock passes through the device and output at RFOUTB. SYSREF delay control does not apply in this mode. To put the LMX device in this mode, set RPTR_NONSYNC = 1.

LMX2624SPEVM LMX2695SEPEVM LMX2824EPEVM Synchronous Mode
                        ConfigurationFigure 4-28 Synchronous Mode Configuration
LMX2624SPEVM LMX2695SEPEVM LMX2824EPEVM Asynchronous Mode
                        ConfigurationFigure 4-29 Asynchronous Mode Configuration
LMX2624SPEVM LMX2695SEPEVM LMX2824EPEVM SYSREF Synchronous Repeater Mode Figure 4-30 SYSREF Synchronous Repeater Mode