EMC EMI Pre Compliance Emissions Testing, FCC and CISPR Pre Check

If you are building a product and want to reduce surprises before official compliance testing, Ampere Engineering offers home based EMC EMI emissions pre screening for small builders, makers, and early stage hardware teams. This service helps identify likely failure frequencies, dominant harmonics, and noisy subsystems so you can fix problems earlier, before paying for lab time.

This is pre check testing, not certification. We perform practical emissions screening to help you answer:

• What frequency bands are noisy
• What signals look like switching noise, clocks, or harmonics
• Which cable, port, or subsystem is likely coupling energy
• What mitigation direction makes sense before an accredited lab visit

• Small manufacturers and builders preparing for FCC emissions testing
• Startups validating prototypes before formal compliance
• DIY and maker projects that need a reality check before scaling
• Teams that want engineering feedback, not just pass fail results

We are limited to emissions screening for devices up to 26.5 GHz. This is intended for small devices and early stage builds, not major certification programs.

Important limitations

• This is home pre screening only, not an accredited test lab
• No FCC certification, no grant support, no official compliance report
• No chamber based radiated compliance measurement
• Results are for engineering guidance, not legal proof of compliance

What you can expect from pre screening

• Practical detection of dominant noise sources and harmonics
• Identification of likely problem bands before official testing
• Recommendations for next steps, grounding, shielding, filtering, layout, cabling, and enclosure changes

• Radiated emissions screening in a practical environment
• Conducted noise indicators and cable coupling red flags
• Switching regulator noise, clock harmonics, data line radiation, and cable antenna behavior
• Quick validation after changes, ferrites, filters, shielding, grounding, and routing updates

You will receive:

• Observed frequency bands of concern
• Notes on likely coupling paths, enclosure seams, cable exits, ports, grounding issues
• Mitigation recommendations prioritized by effort and impact
• Optional retest guidance after changes, so you can verify improvement before sending to a lab

To get meaningful results, bring or send:

• The device, accessories, and the cables used in real operation
• Power supplies, chargers, adapters, and common peripheral connections
• A short description of symptoms, operating modes, and worst case use
• Any known target standard direction, example FCC Part 15, CISPR intent, or lab requirements

1. Intake and goals
   You tell us what you are building, what problems you suspect, and what official testing you plan to use.
2. Pre screening session
   We run emissions screening and identify noise signatures and likely sources.
3. Action plan
   You get prioritized mitigation recommendations and next step options.
4. Verify improvements
   Optional follow up screening after changes to confirm progress before official testing.