Frequency Counter Timebase PCA
OCXO-based printed circuit assembly providing stable 10 MHz reference for universal frequency counters measuring signal periods. Classified HTS 9030.90.68.00 as part for electrical quantity measuring instruments. Oven-controlled crystal ensures ppm accuracy.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for radio navigation reference oscillators
Navigational aid timebases classify in heading 8526 per exclusions.
If general instrument timepieces
Standalone clock generators without measuring principal use go to Chapter 91.
If computer timing circuits
PC clock generators classify under data processing parts.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Include aging rate and temperature stability specs (e.g
• ±0.05 ppm/°C)
• Verify GPS disciplining option doesn't trigger navigation equipment classification
• Ensure oven control circuitry is integral to counter function
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