Understanding Channel Power

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Rohde Schwarz

Күн бұрын

Пікірлер: 10

@lucianodonghia7043 4 ай бұрын

Cristal clear! Thank you

@pauldenisowski 4 ай бұрын

Thanks!

@Tom-dn5de Жыл бұрын

@Paul Denisowski, thank you so much! But what is the purpose of the power measurement here in wireless communication?

@hadidahlan9695 3 жыл бұрын

For channel power measurement with Integrated Bandwidth method, would the RBW setting impact the resulting channel power?

@pauldenisowski 3 жыл бұрын

That's a great question. Generally speaking, you should use a RBW that is a couple of orders of magnitude smaller than the channel width. For example, for a 20 MHz wide LTE channel you would want a RBW around 100 kHz and for a 5 MHz wide WCDMA channel a RBW of about 30 kHz would be appropriate. Using a narrower RBW (slightly) increases measurement time but improves accuracy, especially if the power is not uniform (flat) across the channel. A narrower RBW will also minimize inaccuracy at the edges of the channel caused by the shape of the RBW filter. A spectrum analyzer with a channel power measurement function (like all R&S spec ans) should automatically choose an appropriate RBW based on the channel width, so in most cases you shouldn't need to worry about manually selecting a RBW. Thanks again for the great question!

@nagamanikantachama4462 Жыл бұрын

Hello, thank you for the video. How do I calculate Integrated Bandwith (IBW) power by getting the trace from the Spectrum Analyzer? Let's say I have a 20MHz BW carrier setup at 1GHz. I get the x and y axis trace from the instrument, how do I calculate the IBW power from that imported trace using for e.g MATLAB or Python?

@muhammadrifqisabari7465 2 жыл бұрын

During measure channel power using Integrated Bandwidth, shall I use trace Average or Max Hold for better calculation?

@pauldenisowski 2 жыл бұрын

The general rule of thumb is to use an RMS detector any time that you are measuring power with a spectrum analyzer. There's no reason you can't use average, max or min hold, etc. but RMS is what I would recommend. This would apply if you were measuring power in zero span mode as well.