Texas Instruments TSW40RF8 Series, TSW40RF80, TSW40RF82 User Manual

User's Guide

SLAU706A–January 2017–Revised September 2017

TSW40RF8x Evaluation Module

This user's guide describes the characteristics, operation, and use of the TSW40RF80 and TSW40RF82 Evaluation Module (EVM). A complete schematic diagram, printed-circuit board layouts, and bill of materials are included in this document.

Contents

1 Introduction ................................................................................................................... 2

2 Software Control ............................................................................................................. 2

3 Basic Set-Up ................................................................................................................. 3

4 Quick Start Procedure....................................................................................................... 4

5 Optional Modes and Information........................................................................................... 7

Appendix A LMK Screen Shots With Quick-Start Configuration .......................................................... 10

Appendix B DAC Screen Shots With Quick-Start Configuration .......................................................... 11

Appendix C ADC Screen Shots With Quick-Start Configuration .......................................................... 12

Appendix D HSDC Pro Screen Shots With Quick-Start Configuration ................................................... 13

List of Figures

1 EVM Block Diagram ......................................................................................................... 2

2 Test Set-Up Block Diagram ................................................................................................ 3

3 DAC Output Spectrum ...................................................................................................... 5

4 Captured Output Tone ...................................................................................................... 6

1 Configuration File Name .................................................................................................... 9

2 Configuration File Description.............................................................................................. 9

Trademarks

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List of Tables

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TSW40RF8x Evaluation Module

SysRef

CLK

SysRef

Ref

FMC Connector

LMK04828

VCXO

TSW40RF80

DAC38RF80

DAC

ADC32RF45

ADC

LMX2582

SysRef

CLK

SysRef

Ref

FMC Connector

LMK04828

VCXO

TSW40RF82

DAC38RF82

ADC32RF45

ADC

LMX2582

DAC

Introduction

1 Introduction

1.1 Overview

The TSW40RF8x EVM is a 2T2R RF sampling solution. The board includes the dual 9-GSPS DAC (DAC38RF8x) and a dual, 14-bit, 3-GSPS ADC (ADC32RF45). The TSW40RF80 uses the DAC38RF80 device with integrated balun and the TSW40RF82 uses the DAC38RF82 device with differential output. The board includes the required clocking solution needed for sampling the data converters.

1.2 EVM Block Diagram

Figure 1 shows the configuration of the EVM.

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2 Software Control

2.1 Installation Instructions

Use the following instructions to install the software:

• Open the folder named: TSW40RF8x GUI Installer

• Run Setup.exe

• Follow the on-screen instructions

Figure 1. EVM Block Diagram

TSW40RF8x Evaluation Module

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TSW14J56 TSW40RF8x

Power Supply

Power

Supply

J15

J17

5 V

USB

Spectrum Analyzer

Signal Generator

J12

ChB J4 ChA J3

ChA J9

ChB J10

10 MHz

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3 Basic Set-Up

3.1 Test Block Diagram

Figure 2 shows the test set-up for general testing of the TSW40RF8x EVM.

3.2 Test Set-Up

The following steps describe the test set-up procedures:

1. Connect the TSW40RF8x EVM to the TSW14J56 EVM

2. Connect a 5-V supply to the power supply jack

Basic Set-Up

Figure 2. Test Set-Up Block Diagram

NOTE: Set the current limit to 4.0 A. A 5-V supply with 4-A current capability is required.

3. Connect a 10-MHz signal to J12 at 10 dBm

4. Connect the USB cable to the programming computer

5. Connect an RF cable from J3 to the Spectrum Analyzer. Compensate for the cable loss in the Reference Level Offset parameter of the instrument.

6. Spectrum Analyzer set up:

• anSet center frequency to: 1960 MHz

• anSet frequency span to: 50 MHz

• anRef Level: approximately 0 dBm

• anSet Reference Level Offset: RF output cable loss

• anRBW: 300 kHz

• anVBW: 3 kHz

• anAttn: 10 dB

7. Connect the signal generator through BPF and into J9 for the RX

• anSet the frequency to: 1960 MHz

• anSet amplitude to: 10 dB

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Quick Start Procedure

4 Quick Start Procedure

4.1 Initial Configuration and DAC Output

Use the following for initial configuration and DAC output:

• Engage the 5-V supply; the initial current should be 1.6 ±0.2 A

• Launch the TSW40RF8x EVM GUI: – Go to Start → Texas Instruments → TSW40RF8x GUI

NOTE: USB connection is possible only when the power is engaged to the board.

– If needed, press the Connect FTDI? button to establish the USB connection; pressing this button

multiple times may be necessary to get it to engage

• Select the DAC38RF8x tab → Quick Start tab

• Press the LOAD DEFAULT button

NOTE: This loads the file:

2T2R_RevC_ConstInput_12xDec_18xInt_2949p12M_4915p2Gb.cfg This also loads the proper registers but does not back-fill the values to the ADC tab front

panel. To complete this task go to Low Level tab and press the Read All icon.

Read All does not back-fill the DAC NCO frequency value. If desired, manually go to the DAC38RF8x tab → DAC38RF8x tab → Digital(DAC A/B) to change NCO Frequency(MHz)

to: 1960. Read All does not load the actual ADC NCO frequency (the NCO value is loaded). To see

the frequency go to ADC32RFxx tab → ADC32RFxx tab → DDC Configuration tab. Place cursor in the numerical value and hit a space then enter; the NCO frequency is then calculated.

This file engages the DAC constant input feature to easily see an output tone without pattern generation; this must be disengaged when sending a digital pattern to the DAC.

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• Press the PLL AUTO TUNE button

• Verify: – LED D4 and D5 illuminate – 5-V supply current increases to 3.6 ±0.4 A

• Verify tone output on the spectrum analyzer exists at 1960 MHz at: – TSW40RF80: –2 ±2 dBm – TSW40RF82: 0 ±2 dBm

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Quick Start Procedure

4.2 ADC Output

Use the following to set ADC Output:

• Launch High-Speed Data Converter Pro (HSDC Pro) version 4.2, or later

• Load the ini file: ADC32RF80_LMF_8821.ini – Confirm yes to load firmware

• Change to Complex FFT

• Change to Channel 1/8

• Toggle the ADC Output Setup icon – Click Enable? and Remember for this session – Change the ADC Sampling rate to: 2949.12M – Change the ADC Input Frequency to: 1960M – Change NCO to: –1890M – Change Decimation to: 12 – Press the OK button

• Press the Capture button

• Verify that LED D4 on TSW14J56 is blinking

• Verify tone capture in HSDC Pro similar to Figure 4

Figure 3. DAC Output Spectrum

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Quick Start Procedure

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Figure 4. Captured Output Tone

TSW40RF8x Evaluation Module

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+ 14 hidden pages

Texas Instruments TSW40RF8 Series, TSW40RF80, TSW40RF82 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TSW40RF8x Evaluation Module

1 Introduction

1.1 Overview

1.2 EVM Block Diagram

2 Software Control

2.1 Installation Instructions

3 Basic Set-Up

3.1 Test Block Diagram

3.2 Test Set-Up

4 Quick Start Procedure

4.1 Initial Configuration and DAC Output

4.2 ADC Output