Thank you for visiting RF Cafe! 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 RF Cafe Homepage Thank you for visiting RF Cafe!

FM/PM/AM Accuracy - 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

 Post subject: FM/PM/AM accuracy
Posted: Tue Sep 21, 2010 4:16 am 

Joined: Fri Nov 20, 2009 3:11 am
Posts: 1
:smt102 Dear distinguished guests of the forum,

With reference to the 8902A specifications especially the FM/PM and AM accuracy published in the document , i would be obliged if anyone here can point out the differences in the said specs compared to the ones published by some accredited calibration labs using the same instruments.

For an example , the Freq Modulation accuracy(as stated in the 8902A spec sheet) is given as +2% of reading + 1 digit at freqs ranges 250kHz - 10MHz at rates 20 Hz -10kHz at deviation less than 40kHz peak.
But Agilent in its scope states it at 0.024FM +10Hz peak?
But using the same instruments , the accuracy should be 2% + 1 digit ,agreed?
Can i rewrite the accuracy as 0.02FM + 10 Hz peak?

How about Amplitude Modulation accuracy then?
The 8902A specs state +2% of reading + 1 digit at freq range 150kHz -10MHz at rates 50Hz - 10kHz and depths 5%-99% but again Agilent scope states it at 0.025 AM + 0.14 %......
Should it not be 0.02AM + 0.1% only?

I hope someone can help explain this difference?


 Post subject: Re: FM/PM/AM accuracy
Posted: Wed Sep 22, 2010 9:17 am 

Joined: Sun Jan 11, 2004 4:44 pm
Posts: 18
I've seen the difference in semantics on a lot of certificates from cal labs. Pick a cal lab from a Google Search and call them to ask. You might even try calling Agilent and asking them. Agilent soaks you for products, but is usually pretty good about getting answers.

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 Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Kirt Blattenberger,

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:

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