AZ530-H, High Impedance Probe
High impedance probe can directly contact joint points or routes on printed
circuit boards to test RF interference (RFI). The probe has very high resistance
(similar to insulation resistance value of PCB) and only 2pF load to the
testing point (80Ω at 1GHz). So it can directly contact the circuit without
influence to the circuit.
It can be used to measure the effectiveness of metal shielding. The individual
pins of IC can be considered as RFI sources. This probe can be used to
trace the problem positions on PCB. With this high impedance probe, the
circuit can be connected to 50Ω input of a spectrum analyzer directly.