Homepage - RF Cafe
Webmaster: Kirt Blattenberger | KB3UON | Sitemap | ©1996-2014
Menu below is just a small sample of what is here!
 
Custom Search
More than 10,000 searchable pages indexed.
•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

New R&S SMW200A Digital Predistortion Option Shortens Test Time
and Simplifies Evaluation of Envelope Tracking Amplifiers




-- Rohde & Schwarz has integrated real-time digital
   predistortion into its R&S SMW200A high-end vector signal
   generator. Predistortion can extend the operating range of
   amplifiers but determining the right correction factors
   has always been a time-consuming process.



Munich, February 13, 2014 — The new R&S SMW-K541 digital predistortion option from Rohde & Schwarz allows users to import predistortion coefficient tables directly into the R&S SMW200A. The signal generator uses these delta values to adjust the baseband signal in real-time. The option greatly reduces test times since predistorted waveforms no longer have to be tediously recalculated and imported into the generator.

New R&S SMW200A Digital Predistortion Option Shortens Test Time and Simplifies Evaluation of Envelope Tracking Amplifiers - RF CafeAmplifiers are most efficient when they operate near their maximum output power, which occurs in the nonlinear range. Although more power efficient, this results in distortions at the amplifier output, which considerably diminishes the amplifier's RF performance. Developers, especially developers of envelope tracking power amplifiers for smartphones, base stations and tactical radios, use digital predistortion to counteract this problem. In envelope tracking, the supply voltage tracks the envelope of the RF signal. Envelope tracking can optimize efficiency, but is a valid design approach only when predistortion is used to compensate for nonlinear effects.

The R&S SMW-K541 digital predistortion option allows users to import an AM/AM or AM/PM table with correction factors directly into the R&S SMW200A.  The R&S SMW200A uses the table values to automatically calculate in real-time an amplitude and phase offset for each I/Q sample. The original waveform file remains unchanged. Conventional solutions require users to import a new, predistorted waveform file into the signal generator each time the level changes.

Developers can use the digital predistortion option on all communications standards supported by the R&S SMW200A as well as on their own custom waveforms. For envelope tracking tests with predistortion, the digital predistortion option can be configured and seamlessly combined with the R&S SMW-K540 envelope tracking option so that the envelope signal can be generated either from an undistorted or predistorted signal.

The new R&S SMW-K541 digital predistortion option for the R&S SMW200A is now available from Rohde & Schwarz. The test solution will be presented at the Mobile World Congress 2014 in Barcelona in hall 6, booth C40.


Rohde & Schwarz

The Rohde & Schwarz electronics group is a leading supplier of solutions in the fields of test and measurement, broadcasting, secure communications, and radiomonitoring and radiolocation. Founded 80 years ago, this independent global company has an extensive sales network and is present in more than 70 countries. It has around 9300 employees and achieved a net revenue of EUR 1.9 billion (USD 2.5 billion) in fiscal year 2012/2013 (July 2012 through June 2013). The company is headquartered in Munich, Germany.

All press releases are available on the Internet at http://www.press.rohde-schwarz.com.

R&S ® is a registered trademark of Rohde & Schwarz GmbH & Co. KG


Contacts for Readers:
Customer Support Europe, Africa, Middle East:
Phone: +49 89 4129 12345
E-mail: customersupport@rohde-schwarz.com

Customer Support North America:
Phone: +1 888 837 8772
E-mail: customer.support@rsa.rohde-schwarz.com

Customer Support Latin America:
Phone: +1 410 910 7988
E-mail: customersupport.la@rohde-schwarz.com

Customer Support Asia:
Phone: +65 65130 488
E-mail: customersupport.asia@rohde-schwarz.com

Customer Support China:
Phone: +86-800-810-8228 or +86-400-650-5896
E-mail: customersupport.china@rohde-schwarz.com




Posted  February 14, 2014
A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
Your RF Cafe Progenitor & Webmaster
Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an
                                 engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem! (Seize the Day!)

5CCG (5th MOB): My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website