Checking tinySA input and output levels

Using simple equipment, such as a level adjustable signal generator and an oscilloscope, it is possible to verify the measured and generated levels of the tinySA. The requirements for the signal generator and the oscilloscope that are used in the verification are explained and all the steps are demonstrated.
For more information on the tinySA go to: www.tinysa.org/wiki

[@JAKOB1977]

Interresting, thx for the video.+1.. keep em comming Erik

[@RaimundPopp]

hi Erik, can i produce a 100 MHz square signal output to trigger a fast mosfet?

[@ErikKaashoek]

See spec on wiki for what frequenties in sine wave and what in square wave are possible

[@davidbrowne1588]

Hi great videos thanks for all of the information, My tinySA Is in spec as a spectrum analyser but the built in signal generator is about 7dbm low output power, Can you please tell me how can I do a calibration of the signal generator output level as the output is about 7dbm low, I HAVE Also tested it with a hp spectrum analyser, When testing the 30mhz cal the level is reading 25dbm like on your videos, I do not think this is a clone model as I have done the other tests that you show, Thanks for your help Dave 2E0DMB

[@felixangel470]

Thanks for your videos. They are very interesting and are a great help to learn how to use the TinySA. I´ve done this test (LOW OUTPUT MODE) but in my measurements everything is correct between -7dBm and -35dbm. However, when I change to -36dbm, on the oscilloscope and another RF meter it gives me a reading of -41dBm (-36dBm -> 41dBm, -37dBm -> 42dBm, ... etc). This happens at all frequencies measured in low output mode. Could you try take these measurements? Thanks.

[@ErikKaashoek]

See tinysa.org/wiki/pmwiki.php?n=Main.USBInterface and the command leveloffset switch This command is used to correct the linearity when stepping from -35dBm to -36dBm. This stip is influenced by device variations but should be stable after correcting

[@jeff-73]

When using the tinySA to connect to the oscilloscope, do you need the 50 0hm tee adapter?

[@ErikKaashoek]

For correct levels you need the 50 ohm tee, without the 50 ohm you get twice the voltages

[@erikas6874]

What is the input impedance on the LOW and HIGH input on the tinySA? 50 ohms? I ask because I wonder if I need to use a dummy load attached at the tinySA, as on the scope.

[@ErikKaashoek]

Both tinySA inputs are 50 ohm. No need to add 50 ohm as with the scope.

[@erikas6874]

@@ErikKaashoek Thank you so very much for a fast answer.

[@chryseus1331]

@@ErikKaashoek The high input does not maintain 50 Ohm, so unless you know the impedance of the high port at that specific frequency it'll be off a bit.

[@rolandoleiva3269]

Sadly in the high port can trust on the rf levels generated...