Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums Thank you for visiting RF Cafe!

How to Compare the PIM Level from Different Test Freq? - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | 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 Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !

height-line