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TIDA-00076

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

Design files

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
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Design files & products

Design files

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

download Bill of materials (BOM) — TIDA-00076
TIDR651.PDF (73 KB)

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

download PCB layout — TIDA-00076
TIDR652.ZIP (2276 KB)

PCB layer plot file used for generating PCB design layout

download Schematic — TIDA-00076
TIDR650.PDF (447 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Clock buffers

CDCV304 — General purpose and PCI-X 1:4 LVCMOS clock buffer

Data sheet: PDF | HTML
DC/DC converters

TPS62290 — 2.25MHz 1A Step-Down Converter in 2x2mm SON Package

Data sheet: PDF | HTML
Clock jitter cleaners

LMK04806 — Low-noise clock jitter cleaner with dual cascaded PLLs and integrated 2.5-GHz VCO

Data sheet: PDF | HTML
Hot-swap controllers

TPS2400 — 5.5-V over voltage protection controller with 100-V input transient protection

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7A80 — 1-A, high-PSRR, ultra-low-dropout voltage regulator with low-IQ & enable

Data sheet: PDF | HTML
DC/DC converters

TPS62420 — Dual, Adjustable, 600mA and 1000mA, 2.25MHz Step-Down Converter with 1-Wire Interface in QFN

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS796 — 1-A, low-dropout voltage regulator with enable

Data sheet: PDF | HTML
IQ modulators

TRF3705 — 300MHz to 4GHz Quadrature Modulator

Data sheet: PDF | HTML
High-speed DACs (>10 MSPS)

DAC3482 — Dual-Channel, 16-Bit, 1.25-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)

Data sheet: PDF | HTML

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Hardware development

Evaluation board

TSW3085EVM — Wideband Transmit Signal Chain Evaluation Board and Reference Design

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 (...)

EVM user’s guide: PDF
Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIDA-00076 — Adjacent Channel Power Ratio (ACPR) and Error Vector Magnitude (%EVM) Measurements
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TSW3085EVM — Wideband Transmit Signal Chain Evaluation Board and Reference Design

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TIDA-00076 — Adjacent Channel Power Ratio (ACPR) and Error Vector Magnitude (%EVM) Measurements
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Technical documentation

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

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