Frequency hopping versus digital modulation: prepare the RF operating-mode evidence
The acquired § 15.247 distinguishes frequency-hopping and digitally modulated systems, with band-specific channel, bandwidth and power provisions. Identify the supported modes and actual RF characteristics before defining the applicable assessment; a Wi-Fi or Bluetooth label alone cannot supply those values.
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 § 15.247 / XML P[1]
(a) Operation under the provisions of this Section is limited to frequency hopping and digitally modulated intentional radiators that comply with the following provisions: [1]
Compare this exact dated paragraph, its stated conditions and the linked provisions with the supplied configuration evidence.
title 47 / section § 15.247 / XML P[2]
(1) Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400-2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. The system receivers shall have input bandwidths that match the hopping channel bandwidths of their corresponding transmitters and shall shift frequencies in synchronization with the transmitted signals. [2]
Compare this exact dated paragraph, its stated conditions and the linked provisions with the supplied configuration evidence.
title 47 / section § 15.247 / XML P[6]
(2) Systems using digital modulation techniques may operate in the 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz bands. The minimum 6 dB bandwidth shall be at least 500 kHz. [3]
Compare this exact dated paragraph, its stated conditions and the linked provisions with the supplied configuration evidence.
title 47 / section § 15.247 / XML P[7]
(b) The maximum peak conducted output power of the intentional radiator shall not exceed the following: [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.
Map bands and modulation modes
List actual operating bands, channel arrangements, hopping and digital modes, including enabled/disabled regional configurations.
Useful evidence: Radio specifications and mode/channel matrix.
Provide measured/design inputs
Collect bandwidth, hopping/occupancy and maximum power/antenna evidence relevant to the proposed assessment; do not infer it from a technology name.
Useful evidence: Controlled RF inputs and original supporting measurements.
Agree the worst-case scope
Ask the lab to justify selected configurations and the complete applicable current provisions, including linked limits not reproduced here.
Useful evidence: Justified test/configuration plan and supported exclusions.
Work packages and dependencies
Conditional: Frequency hopping versus digital modulation: prepare the RF operating-mode evidence — 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 Frequency hopping versus digital modulation: prepare the RF operating-mode evidence?
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.
