ISED RSS-247

RSS-247 is an Innovation, Science and Economic Development Canada (ISED) Radio Standards Specification for licence-exempt digital transmission systems (DTS), frequency-hopping systems (FHS) and local area network devices (LE-LAN). The current edition is Issue 4, published on July 24, 2025.

Scope and Frequency Bands

RSS-247 applies to equipment operating in:

• 902–928 MHz;

• 2400–2483.5 MHz; and

• the 5150–5350 MHz and 5470–5895 MHz ranges, subject to the individual 5 GHz sub-band rules.

The applicable requirements depend on the system type, band and operating mode. They cover parameters such as output power, channel occupancy, bandwidth, unwanted emissions and, where applicable, Dynamic Frequency Selection (DFS) and Transmit Power Control (TPC).

Selected Requirements for 2.4 GHz Frequency-Hopping Systems

Frequency-hopping systems in the 2400–2483.5 MHz band must use at least 15 hopping channels. The channel count determines the permitted conducted output power:

• 75 or more hopping channels: up to 1 W;

• 15 to 74 hopping channels: up to 0.125 W.

The maximum e.i.r.p. is 4 W, subject to the antenna and system conditions specified in RSS-247. Other system types and frequency bands have their own limits and measurement requirements.

Bandwidth and Unwanted Emissions

RSS-247 defines system- and band-specific bandwidth, power spectral density and unwanted-emission requirements. The general provisions and measurement framework in RSS-Gen also apply. Compliance must therefore be assessed using the clauses relevant to the product’s operating bands and transmission modes.

Certification and Compliance

Equipment subject to RSS-247 is Category I radio apparatus and requires a certificate issued by an ISED-recognized certification body (CB). Certification documentation must cover the applicable radio parameters, including output power, bandwidth, unwanted emissions and DFS behaviour where required.

The product must carry the required ISED certification information and comply with the administrative, labelling and user-information provisions in RSS-Gen.

RSS-247 Issue 4 was published on July 24, 2025. Its six-month transition period ended on January 24, 2026; Issue 4 is now the applicable edition.