C/N

[trungvoi]

hi everybody

I research how to measure C/N (carrier to noise) with CATV and using a microcontroller or anything. I searched and read some documents and i see that spectrum analyzer uesed normally to measure this ration. But i dont see any project imply about spectrum analyzer with RF frequency (about 50-900MHz). But i feel there is a way simpler than spectrum analyzer. So, i want to ask every in this 4rum for guide, supporting and help me.

[Tim_W.]

Hi trungvoi,

As a starting point I would suggest checking out some of NI's resources for RF:

RF & Communications Resources

RF Demos & Tutorials

Spectral Analysis Fundamentals

Tim W.

Applications Engineering

National Instruments

http://www.ni.com/support 

[trungvoi]

Thank you,Tim W. I will read article that you suggest.

I want to ask a queston: Can i measure C/N but dont use spectrum analyzer?

[Tim_W.]

From what I've researched, determining C/N depends on signal characteristics that are typically found by using a spectrum analyzer (SA). It might be possible to measure C/N without a SA, but you would have to implement the functionality of the SA in some capacity (performing FFTs, sweeps, etc.) to get your signal characteristics. The process of designing such a back-end might end up being more difficult than simply using a SA in the first place.

Tim W.

Applications Engineering

National Instruments

http://www.ni.com/support  

[trungvoi]

Thank a lot.

Do you know module support measure carrier to noise (C/N)?

[Tim_W.]

National Instruments offers a variety of RF equipment. For our selection of Signal Analyzers, visit the following page:

RF Signal Analyzers

Links to other RF hardware can be found on the left-hand side of that page.

Tim W.

Applications Engineering

National Instruments

http://www.ni.com/support