SNAU218A November   2018  – August 2022

 

  1.   LMX2615EVM-CVAL Wideband 15-GHz Synthesizer
  2.   Trademarks
  3. 1 Evaluation Board Setup and Description
  4. 2 Setting Up the Software
  5. 3 Bringing LMX2615 to a Lock State
  6. 4 Current Loop Filter Configuration
  7. 5 Typical Phase Noise
  8. 6 Schematic
  9. 7 Bill of Materials
  10. 8 PCB Specifications
  11. 9 Proper Jumper and Switch Positions
    1. 9.1 Reference Pro Board
  12. 10Revision History

1 Evaluation Board Setup and Description

GUID-999025D6-D051-4EA3-932F-1FAD77BED184-low.gifFigure 1-1 LMX2615EVM Setup and Description
  1. Power:
    1. Set power supply to 3.3 V with 600-mA current limit and connect to VCC SMA.
  2. Input Signal
    1. The EVM is designed for a 100-MHz input reference that should be connected to the OSCin SMA. Some of the options for this could be a signal generator, the 100 MHz output from the Reference Pro board, or a very clean signal source such as the Wenzel 501-4623G ultra-low phase noise 100 MHz reference
  3. Programming Interface:
    • Reference Pro will provide SPI interface to program LMX2615. If using this, Connect USB cable from laptop or PC to USB port in Reference Pro. This provides power to Reference Pro Board and communication with TICS GUI
    • The other option is to use the dip switch on the board to use Pin mode.
  4. Output:
    1. Connect RFoutAP to a phase noise analyzer and connect a 50-Ω terminator to RFoutAM.