Is there a way to get the schematic of the the 250 MHz probes that come with the 5203? I would like to use them (because they are very good probes) for use with a 50 Ohm input spectrum analyzer (not the Picoscope but a "real" one). I don't have anything else handy to do some board probing and I need a higher input impedance probe to use in a 50 Ohm system.
The documentation on the probe says it is a 10 MOhms with a 1 MOhm input (X10 setting) so how does the loading change if it's a 50 Ohm spectrum analyzer instead of a scope? Basically, I'm trying to calibrate the probe for this use so I can compare the value on the analyzer with what I'm really getting.
As an example, the analyzer has a test output at 20MHz at -10 dBm and with the probe I get -35 dBm on the analyzer. So the the "loss" is about 25 dB. Does this make sense with what is inside the probe??