Innovation, Science and Economic Development Canada (ISED) has published SRSP-321.2, Issue 1, which sets out the minimum technical requirements for fixed point-to-point radio systems operating in the expanded 21.2-23.6 GHz band. This new standard replaces the previous SRSP-321.8 and reflects recent spectrum policy decisions by extending the frequency range and updating the radio frequency (RF) channel arrangements.

Key changes include the addition of new RF channel bandwidths (60 MHz, 80 MHz, and 100 MHz), removal of narrower bandwidths (2.5 MHz, 5 MHz, and 7.5 MHz), and revised antenna radiation pattern requirements for different congestion areas. The standard also introduces updated channel selection criteria, encourages the use of co-channel dual polarization (CCDP) technology, and mandates a minimum spectral efficiency of 2.4 bit/s/Hz for digital systems.

The transmitter power is limited to 10 Watts per RF channel, and the maximum equivalent isotropically radiated power (e.i.r.p.) is capped at +55 dBW per channel. Detailed channel center frequencies and arrangements are provided for all supported bandwidths, ensuring efficient spectrum utilization and coordination.

All new fixed point-to-point radio systems in this band must comply with both SRSP-321.2 and the general requirements of SRSP-300-Gen, with SRSP-321.2 taking precedence in case of conflict. Existing systems licensed under the previous standard may continue to operate, but any modifications will be reviewed on a case-by-case basis.

This update is classified as High Impact.

Key reasons for high impact:

• The regulation is final and mandatory for all new fixed point-to-point radio systems in the 21.2-23.6 GHz band.
• It expands the frequency range, introduces new channel bandwidths, and removes obsolete ones, directly affecting equipment design, approval, and deployment.
• Revised antenna requirements and spectral efficiency mandates require technical adjustments by manufacturers and operators.
• The changes affect spectrum planning, coordination, and compliance for a broad range of stakeholders.

Who is affected?

Equipment manufacturers, telecom operators, network planners, spectrum managers, and regulatory compliance teams.

Conclusion:

All stakeholders involved in the design, deployment, and operation of fixed microwave radio systems in Canada must review and adapt to the new requirements to ensure continued market access and regulatory compliance.