Power RF - RF Cafe Forums

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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.

Post subject:

Posted: Fri Jun 22, 2007 8:00 am

Site Admin

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

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