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I don't even know what the switch is. I do have a hot air station and basic skills (THT). Which part is the switch on the board?

This confirms the input switch has too low impedance. It is possible to replace the switch -- For more info on the tinySA go to https://tinysa.org/wiki/

TinySA @-7dB is ~780mVpp measured by the scope (high impedance, direct cable, 1X). Same is 300mVpp with a 50ohm BNC terminator. R44: ~80-90mVpp C98: ~75-85mVpp

If the input switch acts as a low impedance load the level measured at the input drops Please measure the output level of the tinySA when set to -7dB. This should be twice 280mVpp -- For more info on

It is 120mVpp at the entry point too, before anything else, so that is what the scope is measuring. I used that as a "reference".

My mistake Input level at -7 dBm should be 280mVpp Input switch seems broken -- For more info on the tinySA go to https://tinysa.org/wiki/

Also measure either side of R44, close to the mixer -- For more info on the tinySA go to https://tinysa.org/wiki/

The input switch seems ok Lift the large shield between the two sma connectors Set LEVEL/ATTENTION to zero With same input signal measure the level at either side of C98 -- For more info on the

Hello, thank you for the response. At 10MHz@-7dBm output from tinySA, I get the following data: - level indicated by Ultra: -17dBm - input pin ~120mVpp - C58 ~120mVpp - C24 ~100mVpp

Do you have a scope? If yes, can you input a 10MHz signal between -20dBm and 0dBm (such that it is well visible on your scope), you can use the tinySA to generate such a signal Remove carefully the

Hello, I've got a tinySA Ultra in December 2022 and all was good (tests & calibration at least). I also have a tinySA non-ultra. Yesterday while playing around, I've noticed that the signal level

John, Thanks for the idea for that inexpensive signal generator. I saw Tony Albus demo one last year, but thought it wouldn't be accurate enough. You'd mentioned getting rid of that 0 ohm resistor.

Using the 10Mhz cal output and one of the cheap Chinese MAX2870 PLL's sold at the different places (Amazon link only to show the model) modified to accept an external clock of 10Mhz gives me a 5.34Ghz

Are you in the dialout group? The error suggests you haven't got permissions to the device... Good Luck! Paul

Hi Erik and Kurt Thanks for the more 'manual' level calib. Certainly brings back memories of 'old time...' Will try it (ie.? play with) tomorrow. Be safe???? Joe

Hi Joe One detail I forgot to mention. In config set repeat to X10 to stabilized the marker level fluctuation Kind regards Kurt Fra: [email protected] <[email protected]> P? vegne af josephlevy

Hi Joe You already got an answer from Eric, as the frequency must be 5.34GHz within 1KHz. However, the predefined harmonic offset is after a firmware update set to 10.5 and is not far away to what is

I've updated this page: https://tinysa.org/wiki/pmwiki.php?n=TinySA4.Harmonic to include a manual method to calibrate the harmonic jump in case you have a generator at 5.34GHz with lesser frequency

Hi Erik, I missed that one part in the tinysa.org wiki. Thanks. Unfortunately, I don't have an accurate 5.34GHz source. I can work with just the initial calibration and lower frequencies

Thanks Erik Jeff