Measuring power received from antenna
Measuring power received from antenna
Hello,
What is the best way to measure power coming down to the SDR from the receiving antenna? Would a simple multimeter be sufficient?
I've read that RSP can only tolerate 0dBm (1mW).
I want to measure exactly how far the transmitting antenna needs to be not to damage my RSP DUO. I am not looking for any relay/switching products at this time.
Thank you
Pete
What is the best way to measure power coming down to the SDR from the receiving antenna? Would a simple multimeter be sufficient?
I've read that RSP can only tolerate 0dBm (1mW).
I want to measure exactly how far the transmitting antenna needs to be not to damage my RSP DUO. I am not looking for any relay/switching products at this time.
Thank you
Pete
Last edited by PeteSDR on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason
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Re: Measuring power received from antenna
Hello PeterSDR,
The best system to measure the power coming from the antenna to the RSPduo......is the RSPduo itself equipped with a suitable attenuator. As an example, consider (a very, very worst case) that your receive antenna outputs 1 W (+30 dBm): inserting an 80 dB attenuator between antenna and RSPduo, the RSPduo will precisely measure a power level of: +30 -80 = -50 dBm.
Now reverse the line of reasoning: you have an 80 dB attenuator between antenna and RSPduo and the RSPduo shows a level of -85 dBm: then the power coming from the antenna will be: -85+80 = -5 dBm = 0.3 W. You can find attenuator build data and dBm/power conversion tables in the two references below. If you really expect high power, you can build the attenuators with resistors rated 1W or more.
https://www.sdrplay.com/community/viewt ... 2&start=50
https://www.sdrplay.com/community/viewt ... 3&start=10
The best system to measure the power coming from the antenna to the RSPduo......is the RSPduo itself equipped with a suitable attenuator. As an example, consider (a very, very worst case) that your receive antenna outputs 1 W (+30 dBm): inserting an 80 dB attenuator between antenna and RSPduo, the RSPduo will precisely measure a power level of: +30 -80 = -50 dBm.
Now reverse the line of reasoning: you have an 80 dB attenuator between antenna and RSPduo and the RSPduo shows a level of -85 dBm: then the power coming from the antenna will be: -85+80 = -5 dBm = 0.3 W. You can find attenuator build data and dBm/power conversion tables in the two references below. If you really expect high power, you can build the attenuators with resistors rated 1W or more.
https://www.sdrplay.com/community/viewt ... 2&start=50
https://www.sdrplay.com/community/viewt ... 3&start=10
Reason: No reason
Re: Measuring power received from antenna
Thank you glovisol. Exactly what I was looking for.
Last edited by PeteSDR on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason
Reason: No reason