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The [[CW505_Planar_HCW505 Planar H-Field_ProbeField Probe]] (or another H-field probe) can be used to perform side-channel power analysis on a target without inserting a series shunt resistor. In practice this is very simple, it ends up requiring you to (reliably) hold the probe over the chip, for example as shown here:
[[File:hprobe_xmega.jpg|400px]]
== Trace Comparison ==
The following shows the power traces measured using the shunt resistor:
[[File:htest_shuntresistor.png|800px]]
And the same board (but with a higher amplifier setting) using H-Field probe:
[[File:htest_hprobe_raw.png|800px]]
[[Category: Tips]]