Digital emissions scope: compare Class A/B contexts and measurement conditions
The acquired § 15.109 has different Class A and other-device emission tables and measurement conditions, with related measurement provisions and special cases. Ask the lab to justify the actual device/environment category and measurement scope; this page does not supply a universal limit or pass/fail checker.
Evidence retrieved 2026-10-06. Source versions and topic-specific limits are listed below.
Sourced criteria · US
What changes the service scope?
Decision or task
What the source describes
What to prepare
title 47 / section § 15.109 / XML P[1]
(a) Except for Class A digital devices, the field strength of radiated emissions from unintentional radiators at a distance of 3 meters shall not exceed the following values: [1]
Compare this exact dated paragraph, its stated conditions and the linked provisions with the supplied configuration evidence.
title 47 / section § 15.109 / XML P[2]
(b) The field strength of radiated emissions from a Class A digital device, as determined at a distance of 10 meters, shall not exceed the following: [2]
Compare this exact dated paragraph, its stated conditions and the linked provisions with the supplied configuration evidence.
title 47 / section § 15.109 / XML P[3]
(c) In the emission tables above, the tighter limit applies at the band edges. Sections 15.33 and 15.35 which specify the frequency range over which radiated emissions are to be measured and the detector functions and other measurement standards apply. [3]
Compare this exact dated paragraph, its stated conditions and the linked provisions with the supplied configuration evidence.
title 47 / section § 15.109 / XML P[6]
(f) For a receiver which employs terminals for the connection of an external receiving antenna, the receiver shall be tested to demonstrate compliance with the provisions of this section with an antenna connected to the antenna terminals unless the antenna conducted power is measured as specified in § 15.111(a). If a permanently attached receiving antenna is used, the receiver shall be tested to demonstrate compliance with the provisions of this section. [4]
Compare this exact dated paragraph, its stated conditions and the linked provisions with the supplied configuration evidence.
This is a focused preparation guide, not the complete rule set or a product-specific legal determination. Current related rules, amendments/effective dates, grant conditions and deciding buyer facts remain unresolved. No scope, exemption, certification, emission limit or test-panel result is automatically assigned.
Prepare the RF configuration evidence
Use this checklist to gather your business or product details before speaking with a specialist. The items below explain what to record and suggest useful supporting documents. You can add your own answers in the editable project brief.
Describe the intended environment
Document intended users, installation environments and marketed equipment configurations before agreeing the Class A/B assessment.
Useful evidence: Intended environment, equipment description and current classification rationale.
Specify the measurement arrangement
Ask the lab to identify applicable range, detector, distance and configuration requirements from the complete current rules.
Useful evidence: Reviewed test plan, cables/peripherals, antenna and operating modes.
Preserve the result context
Require reports that identify the tested configuration and applicable limit basis; a result under one context does not prove another.
Useful evidence: Original report, photographs, setup/mode list and deviations.
Work packages and dependencies
Conditional: Digital emissions scope: compare Class A/B contexts and measurement conditions — Review the documented configurations and current complete provisions; agree the justified evidence/testing scope and its exclusions.
Questions for providers
Which exact configuration facts and current provisions justify the proposed scope for Digital emissions scope: compare Class A/B contexts and measurement conditions?
Which supplied-source and grant conditions remain unresolved, and how will you investigate them?
Which operating modes/configurations, evidence deliverables and exclusions are included in the quotation?
Sources and data dates
Read the official document in context. The audit details identify the precise locators and preserved versions used for this page.
