SBOU266B september   2021  – august 2023 TRF1208

 

  1.   1
  2.    TRF1208 Evaluation Module
  3.   Trademarks
  4. 1Description
    1. 1.1 Features
    2. 1.2 General Usage Information
  5. 2EVM Overview
    1. 2.1 Schematic
    2. 2.2 PCB Layers
    3. 2.3 TRF1208 EVM Bill of Material
    4. 2.4 Stack-Up and Material
  6. 3Test Setup Diagrams
    1. 3.1 S-Parameter Test Setup
    2. 3.2 Noise Figure Test Setup
    3. 3.3 Two-Tone OIP3 Test Setup
  7. 4Related Documentation
  8. 5Revision History

3.2 Noise Figure Test Setup

GUID-20210809-CA0I-NT82-ZTGX-PNRVT94J8PLB-low.svgFigure 3-3 Noise Figure Test Setup

Use the following guidelines for Noise Figure (NF) measurement:

  1. As Figure 3-3 shows, the traditional Y-factor method can be used for the NF measurement using a Noise Diode and a spectrum analyzer (or a Noise Figure Analyzer).
  2. While doing the measurement, take into account any RF cable losses to the EVM board. Any external input attenuator added for matching will result in proportional NF degradation and must be calibrated out in the measurement.
  3. Also, onboard losses of the input traces at the device input pin must be factored into the NF measurement.
  4. If the loss after the device output is significant, it is important to factor the output loss into the NF measurement. Use the Friis equation to calculate the Noise Figure of the device from the total measured NF.