Jack,
Based on what you are telling us, yes, there is something off with your TinySA Ultra.? Even the base numbers do not add up.? ?Going from 66 dB to 112 dB in external attenuation should decrease the fundamental (main) signal by 46 dBm.? The TinySA readings are not correct.??
I have tried to duplicate the readings on my setup.? I saw no harmonics when I set up the TinySA to measure harmonics.? All are on the noise floor at?
The above is at 22 watts with a total of 70dB external attenuation and 6 dB internal per the screen.
If I do the math, 22 watts = 43.42 dBm?
43.42 - 70 = -26.58 (the 6dBm internal is figured into the calculation for the displayed value)??
All are within the accuracy stated for the TinySA of +/-1dBm.
I tried other bands, and they all seem to work out.? I also do not see any harmonics on any band other than 10 meters where the second is down -53dBc.
The above are on my V3.
73
Evan
AC9TU
