Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Forums Magazine USAF Radr Shop Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Thank you for visiting RF Cafe!
Innovative Power Products Passive RF Products - RF Cafe
Windfreak Technologies Frequency Synthesizers - RF Cafe
 

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

AirplanesAndRockets.com

DC-70 GHz RF Cables - RF Cafe

How to compare the PIM Level from different test freq? - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

-- Amateur Radio

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Systems

-- Test & Measurement

S7_Vulcan
 Post subject: How to compare the PIM Level from different test freq?
Posted: Tue Jan 29, 2008 5:33 pm 
 
Lieutenant

Joined: Tue Jan 29, 2008 5:22 pm

Posts: 2

I got a question about PIM test result.

PIM test is done by using two tones test. However, the frequency of the two tones are not standardized.

Let's say we have two sets of test results from two different companies and they are using different frequency setting (one for 869 MHz & 891 MHz, the other for 1100MHz & 1900 MHz). Their results have the same PIM level.

Which one will be better? and Why?

* I am assuming the one with higher freq tones will be better, because of the skin-effect, but I have a hard time to find any document to approve the relationship between testing frequency, skin-effect, and PIM level.


 
   
 
FSomma
 Post subject:
Posted: Tue May 20, 2008 4:57 pm 
Hi,

PIM means passive intermodulation, and it refers to in-band spurious tones, so you should perform the test with the tones on the frequencies on which your device normally works... if your device works form 800 to 900MHz, you should perform the test with the one with the tones inn 869 MHz & 891 MHz...

In the case that your device works from, let´s say: 600 to 2000MHz, then both measurements are ok, none of them is more characteristic than the other one, and if you need to give a product specification... provide both, explaining each test conditions.

Hope to be helpful

Bye


 
  
 
S7_Vulcan
 Post subject:
Posted: Tue May 20, 2008 5:13 pm 
 
Lieutenant

Joined: Tue Jan 29, 2008 5:22 pm

Posts: 2

Thanks, FSomma

Posted  11/12/2012


RF Cafe Visitor Comments on News, Articles, System, Design, Components, etc.

Please e-mail your comment to me (Kirt B.), and I will post it here for you - no computers involved!

1 - Your participation will be greatly appreciated. - Kirt B.

Triad RF Systems Amplifiers - RF Cafe
RF Cascade Workbook 2018 by RF Cafe
 

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free