Directly using the input of the tinySA to probe an RF circuit may cause to much disturbance in the RF circuit due to the 50 ohm input impedance of the tinySA. In order to have less disturbance I'm using a high impedance probe that uses a FET to convert its 10MOhm, 0.5pF input to a 50 ohm output.
The combination of the probe and the tinySA is demonstrated using a tinySA prototype set up as a conventional heterodyne high IF receiver.
There are many places where you can buy such a high impedance probe, here is one: transverters-s...
More info: www.tinysa.org...
Негізгі бет tinySA using a high impedance probe
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