Tests
- Analyze/measure crystal oscillator harmonics
- E- and H-field probing
- PCBs (printed circuit boards) E- and H-field probes
- Cables (current probes)
- Shields (surface current and 4-point probes)
- Measure bare PCB (printed circuit board) emissions
- Measure induced or conducted emissions in cables
- Shielding (and shield-effectiveness) tests (see below)
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Compact Harmonic Comb Generator Used for Shielding-Effectiveness Test
- May be put inside a product. Useful for shielding-effectiveness measurements.
- Step-recovery diode circuit produces 5 MHz harmonics from 30 to 1500 MHz.
- Powered by 9 Volt battery
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First ... Comb Generator Taped to Prototype Product
Next … Comb Generator is Measured by Itself
Finally...Shielding Effectiveness Plot is the Difference (between the above two tests)
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