Electronics > RF, Microwave, Ham Radio

Performing RF power measurement with SSA3021X+

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antenna:

--- Quote from: xrunner on March 21, 2023, 12:52:05 am ---I'll answer this one. The max input looking at the front connector is +30 dBm. 15W is +41.8 dBm so you would need 41.8 - 30 = 11.8 dB attenuation (or more). A 20 dB attenuator (20 W dissipation) would be a good choice.

--- End quote ---
If it's anything like the SVA1032x, it will start beeping and flashing warnings with 5dBm or above input. I'd go with 40dB attenuation.  Accuracy isn't perfect when hitting it with the maximum signal level.

tlu:
Thanks for the advice on this.

pdenisowski:

--- Quote from: antenna on March 31, 2023, 05:14:56 am ---Accuracy isn't perfect when hitting it with the maximum signal level.

--- End quote ---

Measured level accuracy of any spectrum analyzer is going to be slightly low at maximum safe input level due to compression.  The question is really "how low?"  It's not difficult to measure this (assuming a good source) and the analyzer's P1dB specification can also provide some clues.

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