Left Border Content - RF Cafe
Anatech Electronics (RF Filters) - RF Cafe
Windfreak Technologies
 

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

Header Region - RF Cafe
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 App Notes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Homepage Thank you for visiting RF Cafe!
Sub-Header - RF Cafe Innovative Power Products Resistors

Power RF - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues - primarily having to spend time purging garbage posts from the board. At some point I might start the RF Cafe Forums again if the phpBB software gets better at filtering spam. Note: The RF Cafe Forums were reconstituted in April 2021!

Below are the old forum threads, including responses to the original posts.

-- Amateur Radio
-- Anecdotes, Gripes & Humor
-- Antennas
-- CAE, CAD, & Software
-- Circuits & Components
-- Employment & Interviews
-- Miscellany
-- Swap Shop
-- Systems
-- Test & Measurement
-- Webmaster

badseeds
 Post subject: Power RF
Posted: Mon May 21, 2007 2:36 am 
 
Lieutenant

Joined: Mon May 21, 2007 2:19 am
Posts: 2
Hi,
I have a RF cable with 8 signals at 42 dBm (modulation GMSK). I would like to know the total power (average and peak) and how can I calculate it ?
Thanks for your help.


 
   
 
IR
 Post subject:
Posted: Fri Jun 22, 2007 8:00 am 
 
Site Admin
User avatar

Joined: Mon Jun 27, 2005 2:02 pm
Posts: 392
Location: Germany
Hello,

Each multiplication of the signal level adds 3dB, so for example if you have 2 signals at +42dBm level eahc, the composite level will be +45dBm, If other 2 signals further increas by 2 the previous level (+45dBm) then the level now will be +48dBm and so on.

I am not sure about the PAR of GMSK modulation, but I think that is hould be lower than 3dB. If you measure the power with output power meter (Average) then just add the PAR value and you will get the peak power.




Posted  11/12/2012
Footer - RF Cafe high frequency PCB of PCBONLINE
Right Border Content - RF Cafe
PCB Directory (Assembly)
LOTUS Communications Systems Modular RF Component Building Blocks - RF Cafe
 

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

These Are Available for Free