TIDA-00076

Adjacent Channel Power Ratio (ACPR) and Error Vector Magnitude (%EVM) Measurements

TIDA-00076

Design files

Overview

This reference design discusses the use of the TSW3085EVM with the TSW3100 pattern generator to test adjacent channel power ratio (ACPR) and error vector magnitude (EVM) measurements of LTE baseband signals. By using the TSW3100 LTE GUI, patterns are loaded into the TSW3085EVM which is comprised of the DAC3482, TRF3705, and LMK04806.

Features
  1. Hardware reference design and Demonstration platform for a complete digital to RF transmitter
  2. A Process and setup to test performance metrics for modulated signals such as Error vector Magnitude (%EVM) and Adjacent Channel Power Ratio (ACPR) are provided
  3. Results are tabulated for external clocking of the DAC and also for using the internal PLL of the DAC
  4. An easy to use evaluation platform to make standards compliant measurements

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDR650.PDF (446 K)

Detailed schematic diagram for design layout and components

TIDR651.PDF (72 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDR652.ZIP (2276 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS622902.25MHz 1A Step-Down Converter in 2x2mm SON Package

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck converters (integrated switch)

TPS62420Dual, Adjustable, 600mA and 1000mA, 2.25MHz Step-Down Converter with 1-Wire Interface in QFN

Data sheet document-pdfAcrobat PDF open-in-new HTML
Clock buffers

CDCV304General purpose and PCI-X 1:4 LVCMOS clock buffer

Data sheet document-pdfAcrobat PDF open-in-new HTML
Clock jitter cleaners & synchronizers

LMK04806Low-noise clock jitter cleaner with dual cascaded PLLs and integrated 2.5-GHz VCO

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed DACs (>10MSPS)

DAC3482Dual-Channel, 16-Bit, 1.25-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
IQ modulators

TRF3705300MHz to 4GHz Quadrature Modulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7961-A, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A801-A, high-PSRR, ultra-low-dropout voltage regulator with low-IQ & enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
eFuses & hot swap controllers

TPS24005.5-V over voltage protection controller with 100-V input transient protection

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Hardware

Evaluation board

TSW3085EVM — TSW3085EVM

The TSW3085 Evalutaion Module is a circuit board that allows system designers to evaluate the combined performance of Texas Instruments' transmit signal chain with the LMK04806B (formally National Semiconductor) low noise clock generator/jitter cleaner. For ease of use as a complete RF transmit (...)

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Technical documentation

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Type Title Date
User guide TSW3085EVM ACPR and EVM Measurements (TIDA-00076 Reference Guide) Dec. 29, 2011

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