Hi,
How much signal are you applying from that antenna? I need attenuators on the input to my SAs with any antenna. Almost always benefit from attenuators ahead of the communication receivers too and for the same reasons.
73,
Bill ?KU8H
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On Oct 14, 2023, at 1:37 AM, ronaldo martins <ram.ufrn@...> wrote:
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Friends. Good morning. I have a doubt about tinSA measurement error (probably mine). Every radio frequency emission has the fundamental and harmonics. In a broadcast from a commercial FM station we have the main frequency (94.3 MHz, for example). The second harmonic will be at 188.6 MHz = (94.3 x 2). Choose the station (or signal generated by you) of your preference. Do it on your tinySA with an input at 85 MHz and a stop at 200 MHz and tune in to your station/signal, with the small antenna and input at Low or a direct cable. The international standard states that this second harmonic must be between 75-80 bB below the main one. Centering the marker on these two values we have practically the same value measured in
- dBm (top left of the display). Which is an inconsistency. If anyone has any guidance, I would appreciate it.
AT
RAMartins
