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


Design files


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.

  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.

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


Includes TI products in the design and potential alternatives.

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Clock buffers

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Clock jitter cleaners & synchronizers

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

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High-speed DACs (>10 MSPS)

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

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IQ modulators

TRF3705300MHz to 4GHz Quadrature Modulator

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Linear & low-dropout (LDO) regulators

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Linear & low-dropout (LDO) regulators

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

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eFuses & hot swap controllers

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

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Evaluation board

TSW3085EVM — Wideband Transmit Signal Chain Evaluation Board and Reference Design

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 (...)

User guide: PDF
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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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