Understanding CAN CSA CISPR 32-17: Emission Requirements for Multimedia Equipment in Canada

CAN CSA CISPR 32-17 is the Canadian adoption of the international standard CISPR 32 (Edition 2.0: 2015-03), titled Electromagnetic Compatibility of Multimedia Equipment – Emission Requirements. Published by the Canadian Standards Association (CSA) in 2017, this standard consolidates and replaces the earlier emission limits for information technology equipment (ITE) and audio/video equipment, which were previously governed by CISPR 22 and CISPR 13, respectively. The standard establishes uniform emission limits for multimedia equipment (MME) to prevent harmful interference to radio services in the frequency range from 9 kHz to 400 GHz.

Scope of CAN CSA CISPR 32-17

CAN CSA CISPR 32-17 applies to multimedia equipment (MME), defined as any device that integrates multiple functions, including but not limited to:

Information technology equipment (computers, servers, network equipment)
Audio/video equipment (televisions, DVD players, audio amplifiers)
Broadcast reception equipment (TV and radio receivers)
Multi-function peripherals (printers, scanners, copiers)

The standard covers equipment intended for use in residential, commercial, and light-industrial environments. It specifies both conducted and radiated emission limits at all designated ports, including mains, signal, telecommunication, and antenna ports. The standard does not cover immunity requirements, which are addressed in separate standards (e.g., CISPR 35 or IEC 61326 series).

Tip: CAN CSA CISPR 32-17 is harmonized with CISPR 32, meaning any product compliant with the international version generally meets the Canadian requirements. However, always verify national deviations if any.

Technical Requirements

Classification of Equipment

The standard divides MME into two classes based on the intended environment:

Class A: Equipment intended for use in commercial, industrial, or business environments (e.g., office equipment, servers). Emissions limits are less stringent, but interference must still be mitigated.
Class B: Equipment intended for use in residential environments (e.g., home computers, televisions). These limits are more stringent to protect domestic radio reception.

Emission Limits

Conducted emissions are measured at the mains port in the range 150 kHz to 30 MHz. Table 1 summarizes the quasi-peak and average limits for Class A and Class B equipment.

Table 1 — Conducted Disturbance Limits at the Mains Port (dBµV)
Frequency Range (MHz)	Class A – Quasi-Peak	Class A – Average	Class B – Quasi-Peak	Class B – Average
0.15 – 0.50	79	66	66 – 56 *	56 – 46 *
0.50 – 5	73	60	56	46
5 – 30	73	60	60	50

* Limit decreases linearly with the logarithm of the frequency.

Radiated emission limits are specified for frequencies from 30 MHz to 6 GHz. Table 2 provides the limits at a measurement distance of 10 m for Class A and Class B equipment. Alternative distances (3 m) may be used with appropriate corrections.

Table 2 — Radiated Emission Limits at 10 m (dBµV/m)
Frequency Range (MHz)	Class A	Class B
30 – 230	40	30
230 – 1000	47	37
1000 – 3000	56**	50**
3000 – 6000	60**	54**

** Limits at 3 m measurement distance; for other distances apply the inverse-distance correction.

Measurement Methods

The standard requires emissions to be measured using defined methods on a representative sample of final production equipment. Key aspects include:

Conducted emissions: Using a line impedance stabilization network (LISN) and a measurement receiver with quasi-peak and average detectors.
Radiated emissions: In a fully anechoic room (FAR) or on an open-area test site (OATS) with specified antenna heights and polarization.
Port configuration: Each port (signal, telecom, antenna) must be terminated with typical impedances and monitored for emissions as required.

Warning: Test setups must closely replicate the equipment’s intended installation. Cable routing and bundling can significantly affect measured levels and lead to false failures.

Implementation Highlights

For manufacturers transitioning from CISPR 22 or CISPR 13 to CAN CSA CISPR 32-17, the following points are critical:

Wider scope: Products that previously fell under separate standards must now be tested comprehensively as MME, often requiring additional port testing.
Stability of limits: In most cases, the limits for ITE and AV equipment remain similar, but the classification rules have been refined. A device previously Class A under CISPR 22 may remain Class A under CISPR 32.
Above 1 GHz testing: The standard introduces mandatory radiated emission limits above 1 GHz (up to 6 GHz) for products that generate or utilize frequencies above 1 GHz, such as digital interfaces and wireless modules.
Compliance paths: Self-declaration of conformity is possible when testing is performed by an accredited laboratory. The standard is referenced by regulatory bodies (e.g., ISED) to demonstrate compliance with Canadian EMC requirements.

Compliance and Certification in Canada

CAN CSA CISPR 32-17 is a voluntary standard in itself, but it is widely recognized by Innovation, Science and Economic Development Canada (ISED) as a technical basis for demonstrating conformity to the Canadian Interference-Causing Equipment Regulations. Manufacturers must:

Obtain an accredited EMC test report according to CISPR 32 methods.
Ensure that the product labeling includes compliance marks (e.g., CSA logo or ICES marking) as required.
Maintain a technical construction file (TCF) containing test results, photos, and design details.

Success: Compliance with CAN CSA CISPR 32-17 facilitates market access not only in Canada but also in other regions that have adopted CISPR 32, including the European Union and many Asian markets.

Danger: Non-compliant products may be subject to enforcement actions such as market restrictions, recalls, or fines by ISED. It is essential to test early in the design cycle.

Frequently Asked Questions

Q: What is multimedia equipment (MME) under CAN CSA CISPR 32-17?
A: MME includes any device that performs one or more functions of information technology, audio/video processing, broadcast reception, or telecommunication – for example, a smart TV (display, tuner, network interface) or a networked printer (printing, scanning, wireless).

Q: What is the difference between Class A and Class B equipment?
A: Class A equipment is intended for commercial, industrial, or business environments and has higher permissible emission levels. Class B equipment is intended for residential environments and has stricter limits to protect household radio reception. Manufacturers must declare the class based on the product’s intended use.

Q: How does CAN CSA CISPR 32-17 relate to international CISPR 32?
A: CAN CSA CISPR 32-17 is an identical adoption of CISPR 32 with no national deviations. Therefore, a product that meets the international standard technically meets the Canadian version. However, manufacturers must follow Canadian marking and certification procedures (e.g., ICES requirements) separately.

Q: Is compliance with CAN CSA CISPR 32-17 mandatory in Canada?
A: The standard itself is voluntary, but it is the primary technical reference used by ISED to enforce the Interference-Causing Equipment Regulations. Practical compliance with the regulation effectively requires meeting the emission limits and test methods of CAN CSA CISPR 32-17.

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