On Tue, Aug 4, 2020 at 05:20 PM, hwalker wrote:
Prior to the version 1.0-49 FW update a level calibration on my v0.3 tinySA would set leveloffset low to '0' which gave me a measurement error of < 1dB across the board measured against an external signal source.? With v1.0-49 a level calibration is now setting leveloffset low to '1.7' and my measurements against an external signal source are off by about that amount.? I have to manually set 'leveloff low 0' to regain my <1dB accuracy.? This using the new correction table.
Herb,
Can you check if the same is happening when you manually calibrate using the 30MHz cal output, center = 30MHz and span=10MHz and then an ACTUAL POWER set to -25?
If that gives a good result can you manually calibrate using? the 30MHz cal output, center = 30MHz and span=60MHz and then an ACTUAL POWER set to -25?
I'm most interested in the difference in calibrating powerlevel using ACTUAL POWER using a span of 10MHz versus a span of 60MHz.
