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Deep-dive articles on specific certification topics. Each article belongs to a certification guide.
EMC Testing: The Complete Guide
EMC vs EMI Testing: What's the Difference?
EMC vs EMI testing explained -- electromagnetic compatibility covers both emissions and immunity, while EMI focuses on interference. Here's what each means for your product.
14 min readHow to Choose an EMC Test Lab: A Buyer's Guide
How to evaluate and select the right EMC test lab for your product — accreditation, capabilities, pricing structures, turnaround, red flags, and what to ask before signing a quote.
19 min readEMC Pre-Compliance Testing: Save Money Before the Lab
How pre-compliance EMC testing catches radiated and conducted emissions failures early, what equipment you need, common failure modes, and cost comparison vs formal lab retests.
13 min readCE Marking: The Complete Guide
How to Get CE Marking for Electronics: Step-by-Step
The complete CE marking process for electronics — from identifying directives through testing, documentation, Declaration of Conformity, and affixing the CE mark
23 min readCE Marking Cost: What to Budget for Electronics Compliance
CE marking costs broken down by directive — EMC testing, safety certification, RED compliance, documentation, and EU representative fees for electronics products
17 min readUKCA Marking Guide: Post-Brexit Compliance for Electronics
UKCA marking explained — how the UK's product compliance system works after Brexit, how it compares to CE marking, and what electronics manufacturers need to do
14 min readFCC Certification: The Complete Guide
FCC KDB Publications: The Engineer's Guide to FCC Guidance Documents
FCC Knowledge Database (KDB) publications explained — the essential guidance documents that fill gaps between FCC rules and real-world certification, with the most important KDBs every engineer should know
16 min readFCC Equipment Authorization: Certification, SDoC, and How to Choose
A practical guide to FCC equipment authorization — the two paths (Certification and SDoC), when each applies, how the TCB system works, FCC ID structure, step-by-step filing process, fees, and timelines.
16 min readFCC Permissive Changes: When You Can Modify a Certified Product
FCC permissive changes explained for hardware engineers — Class I vs Class II vs Class III, what triggers full recertification, firmware update rules, and how to file changes under 47 CFR 2.1043.
14 min readFCC Module Certification: Full vs Limited Modular Approval Under 15.212
How FCC modular transmitter certification works under 47 CFR 15.212 — the 8 requirements for full modular approval, limited vs split module paths, and when to certify your own module vs use a pre-certified one.
12 min readFCC Part 15 Guide: What Hardware Engineers Need to Know
FCC Part 15 for hardware engineers: subparts, device classification, emission limits, authorization paths, and what it takes to get your product through compliance testing.
16 min readSAR Testing Requirements: When Your Device Needs It and What to Expect
When FCC SAR testing is required, how it works, what it costs, and how it differs from MPE evaluation. A practical guide for hardware teams building wireless devices used near the body.
13 min readFCC Certification Cost (2026): $1,500 to $200K+ by Device Type
SDoC costs $1,500–$5K. Pre-certified WiFi/BLE modules: $3K–$10K. Custom RF: $8K–$200K+. Full breakdown of lab fees, TCB review, and how to cut costs.
9 min readFCC Testing Timeline: What to Expect from Lab to Approval
Realistic timeline breakdown for FCC certification — from pre-compliance testing through lab booking, formal testing, TCB review, and grant issuance. What causes delays and how to accelerate the process.
12 min readSDoC vs Certification: Which FCC Path Is Right for Your Product?
How to choose between Supplier's Declaration of Conformity (SDoC) and full FCC Certification. Covers Part 15 subparts, decision criteria, cost and timeline differences, and common mistakes.
10 min readDo You Need FCC Certification?
How to determine whether your product needs an FCC ID, SDoC self-declaration, or nothing at all. Covers intentional vs unintentional radiators, exemptions, and the decision process.
7 min readFCC Label Requirements
Physical label rules, electronic labeling (e-labeling), FCC ID format, compliance statements, and label placement for certified devices.
7 min readPre-Certified Modules & Host Device Testing
How pre-certified RF modules like ESP32 and nRF52 reduce your certification burden, what host-level testing you still need, and when a module is not enough.
7 min read