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Re: Brand new to both TinySA AND Spectrum Analyzers


 

DO NOT dump your 1-watt HT directly into the TInySA or any of the NANOVNAs!! ? 1-watt is +30 dBm.? The designer strongly recommends a maximum input of -26 dBm for a faithful measurement/rendition of the input signal.? That would require a total of 30 + 25 dB of attenuation, 55 dB of total attenuation.? For safety, I would not assume the internal attenuator could handle a full+30 dBm, or 1-watt.

Dave - W?LEV?


On Mon, Jan 20, 2025 at 5:32?PM Joe Tomasone via <joe=[email protected]> wrote:
I just received the TinySA Ultra.? ?As a first practical use, I want to measure spurious emissions from my various transmitters.? ?However, I understand that there is a maximum of -25dbm on the low input, and a maximum 30dbm internal attenuator.? By my calculations, this falls far short of even a 1w transmitter.??
?
Am I correct in assuming that connecting a 1w transmitter (an HT, say) to the TinySA via SMA cable to the low input will be definition require a minimum of a 25dbm attenuator plus the internal 30dbm attenuator to get a 1w signal under the -25dbm low input threshold?
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--
Dave - W?LEV


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