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Difference between revisions of "H Probe Usage"
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| + | The [[CW505 Planar H-Field 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]] | ||
| + | |||
| + | == Video Example == | ||
| + | |||
| + | {{#evt: | ||
| + | service=youtube | ||
| + | |id=https://www.youtube.com/watch?v=zmGKZw_txJc&hd=1 | ||
| + | |dimensions=1000 | ||
| + | }} | ||
| + | |||
| + | == 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]] | [[Category: Tips]] | ||
Latest revision as of 16:41, 9 April 2017
The CW505 Planar H-Field 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:
Video Example
Trace Comparison
The following shows the power traces measured using the shunt resistor:
And the same board (but with a higher amplifier setting) using H-Field probe:
