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

3.1 S-Parameter Test Setup

GUID-20210809-CA0I-0XNS-860B-PL3NKTSMFVBB-low.svg Figure 3-1 S-Parameter Test Setup

Use the following guidelines for S-parameter measurement:

  1. As Figure 3-1 shows, the S-parameter measurement is typically done using a Vector Network Analyzer (VNA). For measuring the TRF1208 EVM, a 3-port VNA is recommended which can generate single-ended and receive differential signals at the input and output ports of EVM respectively.
  2. Before connecting the RF coax cables to the EVM, you must calibrate the VNA along with the cables using a calibration kit.
  3. Make sure the frequency sweep and output power level from the VNA is set within the linear operating range of the TRF1208 devices. The resolution bandwidth (RBW) and dynamic range of the VNA can be adjusted to give optimum sweep time for the measurement.
  4. Account for board trace losses at the input and output side of the device during gain measurements. Figure 3-2 gives typical input and output trace losses measured on the EVM.
GUID-20210812-SS0I-VCNK-SLC0-DLGJKVL0L3QT-low.svgFigure 3-2 PCB Trace Loss vs Frequency