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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:
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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]]
 
[[File:hprobe_xmega.jpg|400px]]
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== Trace Comparison ==
 
== Trace Comparison ==
  
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The following shows the power traces measured using the shunt resistor:
  
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[[File:htest_shuntresistor.png|800px]]
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And the same board (but with a higher amplifier setting) using H-Field probe:
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[[File:htest_hprobe_raw.png|800px]]
  
 
[[Category: Tips]]
 
[[Category: Tips]]

Latest revision as of 17:41, 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:

Hprobe xmega.jpg

Video Example

Trace Comparison

The following shows the power traces measured using the shunt resistor:

Htest shuntresistor.png

And the same board (but with a higher amplifier setting) using H-Field probe:

Htest hprobe raw.png