SBAU467 October   2024 ADC32RF55

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Required Hardware
    2. 2.2 Required Software
  8. 3Quick Start Guide
    1. 3.1 Introduction
    2. 3.2 Hardware Setup
    3. 3.3 Software Setup
      1. 3.3.1 ADC32RF5xEVM GUI Installation
      2. 3.3.2 High Speed Data Converter Pro GUI Installation
    4. 3.4 Quick Start Procedure for Bypass Mode
      1. 3.4.1 2x Averaging in Bypass Mode
    5. 3.5 Quick Start Procedure for Complex Decimation Mode
      1. 3.5.1 8x Complex Decimation
      2. 3.5.2 128x Complex Decimation
    6. 3.6 Operating Modes
      1. 3.6.1 Input Comparison
      2. 3.6.2 Quad ADC Mode
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Related Documentation

3.5.2 128x Complex Decimation

This example uses a coherent 1.003GHz input on the channel B input with the ADC in a 2x averaging mode with dither enabled.

Procedure

  1. Under the Analog and Clock tab, toggle Dither Enable to the on position and set Dither Amplitude_1 to 3.
  2. In the Bypass Mode box, use the DDC drop-down to change to Complex Mode. Notice that the box title changes to Complex Mode to reflect the current DDC operating mode. Press the Home Button to change back to the home screen.
  3. Set Average to 2x and change ADC Mode to Dual with averaging.
  4. Use the Decimation drop-down to change the decimation to 128.
  5. Set the LMFSHd setting to 1-4-8-1-0.
  6. Set the channel INB1 NCO0 and NCO1 to 1000 (MHz).
  7. Change LMK divider from 8 to 32.
  8. Once these settings are verified and match Figure 3-10, press the Device Bringup button.
    ADC32RF55EVM, TRF1305EVM ADC32RF5xEVM GUI, 128x complex decimation, 1GHz NCO Figure 3-10 ADC32RF5xEVM GUI, 128x complex decimation, 1GHz NCO
  9. Wait until after the message Device Bringup Completed appears in the Log.
  10. In HSDC Pro, connect to the TSW14J58EVM and select ADC32RF5x_1481_1p5G-2G as the INI file shown in Figure 3-11.
    ADC32RF55EVM, TRF1305EVM ADC32RF5x_1481_1p5G-2G INI file Figure 3-11 ADC32RF5x_1481_1p5G-2G INI file
  11. Update the firmware by pressing Yes on the pop-up window and waiting for the Downloading Firmware message to finish.
  12. Open the Additional Device Parameters menu by clicking on the gear next to the ADC Output Data Rate field.
  13. Check the box labeled Enable? and then enter the parameters shown in Figure 3-12.
    ADC32RF55EVM, TRF1305EVM Additional Device Parameters , 128x Complex Decimation Figure 3-12 Additional Device Parameters , 128x Complex Decimation
  14. Once completed, press OK.
  15. Check the box labeled Auto Calculation of Coherent Frequencies to see the ADC Input Target Frequency change from 1.003G to the coherent frequency. Set the signal generator connected to the channel B input to this coherent frequency.
  16. Change the view window from Real FFT to Complex FFT and select channel 3/4.
  17. Press the Capture button and a screen similar to Figure 3-13 shows.
  18. Adjust signal generator output such that the measured fundamental power in HSDC Pro is at the user's desired level.
ADC32RF55EVM, TRF1305EVM 1003.002MHz Input, 128x Complex Decimation, 2x Averaging, Dither Amplitude 3 Figure 3-13 1003.002MHz Input, 128x Complex Decimation, 2x Averaging, Dither Amplitude 3