RSS-310 — Licence-Exempt Radio Apparatus: Category II Equipment

Issue 4

Posted on Industry Canada website: July 9, 2015


Radio Standards Specification RSS-310, Issue 4, Licence-Exempt Radio Apparatus: Category II Equipment, sets out standard requirements for licence-exempt radio apparatus used for radiocommunication (other than broadcasting) that is exempt from equipment certification.

This document will be in force 90 days after its publication on the Department's website (

List of Changes:

  1. Section 3.2, Underground Radios, has been revised.
  2. Minor editorial modifications and corrections have been made throughout.

Enquiries may be directed to the following address:

Industry Canada
Engineering, Planning and Standards Branch
235 Queen Street
Ottawa, Ontario  K1H 0H5

Attention: Regulatory Standards

All Spectrum Management and Telecommunications publications are available on the following website:


Issued under the authority of
the Minister of Industry

space to insert signature

Daniel Duguay
Director General
Engineering, Planning and Standards Branch

List of Acronyms

alternating current
Compliance Specification
decibel microvolts per metre
Interference-Causing Equipment Standard
line impedance stabilization network
public switched telephone network
radio frequency
Radio Standards Specification
technical acceptance certificate

1. Scope

This Radio Standards Specification (RSS) sets out standard requirements for licence-exempt radio apparatus used for radiocommunication (other than broadcasting) that is exempt from certification.

2. General

2.1 Purpose and Application

Category II equipment is comprised of radio apparatus for which standards have been prescribed. Pursuant to subsection 21(5) of the Radiocommunication Regulations, Category II equipment is certification- exempt and, therefore, no technical acceptance certificate (TAC) from Industry Canada or certificate from a certification body is required. Pursuant to subsection 4(3) of the Radiocommunication Act, the manufacturer, importer and/or distributor shall ensure that Category II equipment is in compliance with all applicable procedures and standards.

2.2 Test Report

Under RSS-310, the manufacturer or importer of Category II radio apparatus shall ensure that compliance with all applicable technical requirements has been demonstrated and that the results have been compiled into a proper test report. Tests shall be performed and the test report prepared in accordance with the provisions of RSS-Gen, General Requirements for Compliance of Radio Apparatus (except those provisions applicable only to certification of Category I equipment).

The test report shall be retained by the manufacturer or agent whose name appears on the equipment label for as long as the model is marketed in Canada and shall be made available to Industry Canada upon request.

2.3 Labelling Requirements

The manufacturer, importer or supplier shall meet the labelling requirements set out in this section and in Notice 2014 — DRS1003 for electronic labelling (e-labelling) for every unit:

  1. prior to marketing in Canada, for RSS-310 radio apparatus manufactured in Canada and
  2. prior to importation into Canada, for imported RSS-310 radio apparatus.

Each unit of radio apparatus (under RSS-310) shall bear a label which represents the manufacturer's or importer's Self-Declaration of Compliance (SDoC) with Industry Canada's RSS-310. This label shall be permanently affixed to the apparatus or displayed electronically and its text must be clearly legible. If the dimensions of the device are too small or if it is not practical to place the label on the apparatus and e-labelling has not been implemented, the label shall be, upon agreement with Industry Canada, placed in a prominent location in the user manual supplied with the apparatus. The user manual may be in an electronic format and must be readily available.

Industry Canada RSS-310 Compliance Label:

Manufacturer's Name or Brand Name
Model: (model number)
Canada 310

Note: The RSS-310 compliance label is not required on devices consisting of Category II radio apparatus (subject to RSS-310) that are housed together with Category I radio apparatus (e.g. a transceiver whose receiver is Category II radio apparatus and whose transmitter is Category I radio apparatus). These devices are, however, subject to the labelling requirements applicable to Category I radio apparatus, as set out in RSP-100, Certification of Radio Apparatus. That said, compliance of such Category II radio apparatus with the applicable user manual, as well as the testing and reporting requirements set out in RSS-310, is mandatory.

2.4 User Manual

Except as stated below in this section, Category II radio apparatus shall comply with the user manual requirements of RSS-Gen. For Category II transmitters, in addition to the user manual requirements of RSS-Gen, the carrier frequency and the RF output power (or field strength and measurement distance) shall be stated in the user manual. The user manual requirements of RSS-Gen do not apply to Category II receivers that are for use in licensed radiocommunication services. As indicated in Section 2.3, the user manual shall display the following notice in a conspicuous location if it is not possible to affix a physical label to the device or to display the label electronically:

This device complies with Industry Canada's RSS-310. Operation is subject to the condition that this device must not cause harmful interference and must accept any interference, including interference that may cause undesired operation of the device.

2.5 Emissions Falling Within Restricted Frequency Bands

Category II radio apparatus is required to comply with the provisions in RSS-Gen with respect to emissions falling within restricted frequency bands. These restricted frequency bands are listed in RSS-Gen.

2.6 RSS-Gen Compliance

RSS-310 shall be used in conjunction with RSS-Gen, General Requirements for Compliance of Radio Apparatus, for general specifications and information.

3. Technical Requirements

3.1 Category II Receivers

Category II receivers shall comply with the applicable requirements set out in RSS-Gen.

3.2 Underground Radios

Underground radio apparatus subject to this standard consists of base stations or repeaters (or both) and portable or mobile units located and operated completely below the surface of the earth, not freely accessible to the public such as mines.

3.2.1 User Manual and Labelling

In addition to the labelling requirements in Section 2.3, the equipment shall bear a label stating: “For underground installations only”.

In addition to the user manual requirements in Section 2.4, the user manual shall include a notice cautioning the user not to install the transmitter near any opening to above ground, and shall provide instructions to comply with the requirements set out in this section.

Underground locations are defined as locations completely below the surface of the earth that are not freely accessible to the public. As such, radio apparatus operating in underground locations, for example, subway stations, underground parking, underground retail and businesses, do not qualify for licence exemption and require certification.

Above ground base stations whose sole means of communication is via cable, are licence-exempt and do not require certification.

Radio stations that operate exclusively in underground locations, not accessible to the public, are subject to this standard and are licence-exempt. These exempt stations operate on a secondary, no-interference, no-protection basis. Should interference be caused to any above ground radio apparatus, the operator of the underground system must take immediate remedial action to eliminate the interference.

Although these radio systems are licence-exempt, users may consult the local district office of Industry Canada (RIC-66) regarding their proposed frequency selections. This would prevent the radio systems from operating on channels which may create interference with safety services and would help in the identification of systems inadvertently radiating signals above ground.

3.2.2 Technical Requirements

Licence-exempt underground radio systems are not restricted in the number of frequencies that they may use. However, the fundamental components of modulation shall not fall within the restricted frequency bands listed in the “Restricted Frequency Bands” section of RSS-Gen.

The transmitter output power should not be greater than necessary for its intended function. Under no circumstance should the power exceed 110 W.

3.2.3 Installation Requirements

At any location not defined as an underground location, the radio frequency (RF) field leakage from an underground radio system at the fundamental frequency shall not exceed the general field strength limits listed in the “Transmitter Emission Limits for Licence-Exempt Radio Apparatus” section of RSS-Gen.

3.3 Cable-Locating Equipment (Band 9-490 kHz)

Cable-locating equipment is used to locate a buried cable or pipe by coupling an RF signal onto the cable or pipe and using a receiver to detect its location. The equipment may operate on any frequency within the band 9-490 kHz, subject to the following power limits:

  1. 9-45 kHz: 10 W peak output power
  2. 45-490 kHz: 1.0 W peak output power

In addition to RSS-Gen user manual requirements, the user manual shall contain the following or equivalent notice:

Equipment is for use by trained operators only and not for general household use. Usage duration shall be as short as possible to prevent possible radio interference to authorized services, especially the 100 kHz eLORAN frequency.

3.4 Alternating Current (AC) Wire Carrier Current Devices — Intentional Radiator Type (Bands 0-535 kHz and 535 kHz-30 MHz)

These devices are intended for use inside buildings, using the building's AC wiring for RF signal propagation. The signals are generated by a transmitter unit that is electrically connected to the building wiring. The wiring intentionally radiates RF emissions containing the signals, which are intended to be picked up over the air by receiving devices within the building. These systems shall comply with the limits set out in this section.

An AC wire carrier current device of the unintentional radiator type, for which both the exciter (transmitter) and the receiver are connected to the building wiring and any radiated emissions of RF energy are unintentional, is considered to be interference-causing equipment and is regulated by Industry Canada's Interference-Causing Equipment Standard ICES-006, AC Wire Carrier Current Devices (Unintentional Radiators).

3.4.1 Conducted Limits

Note: The limits for unwanted emissions conducted onto the public utility AC power lines prescribed in RSS-Gen do not apply to AC wire carrier current devices.

(1) Band 0-535 kHz: For AC wire carrier current devices that have fundamental frequencies of 0-535 kHz, the harmonics and unwanted emission frequencies that fall within 535-1705 kHz shall not exceed 1000 µV, measured across a 50 Ω line impedance stabilization network (LISN).

The maximum output voltages for carrier current devices are listed below in Table 1, and should be measured, in turn, with 5 Ω and 50 Ω resistive loads. If the duty cycle is not determined by the manufacturer of the device (i.e. the duty cycle is system-dependent), the user manual shall provide clear instructions to the system designer about how to compute the maximum permissible output voltage of the system, based on the table below.

Table 1 — Maximum Output Voltages for Carrier Current Devices
Frequency Maximum Carrier Current Output Voltages
Below 9 kHz No limits
9-95 kHzFootnote Note 1 15.0 V pk-pk (or 5.3 V r.m.s.)
105-185 kHzFootnote Note 1 15.0 V pk-pk (or 5.3 V r.m.s.)
185-535 kHz
  1. 0.45(B/D)2 V pk-pk for devices intended for connection to 120 V AC lines, and
  2. 0.90(B/D)2 V pk-pk for devices intended for connection to 240 V AC lines
    15 V pk-pk, whichever is the lesser voltage (for 120 V AC and 240 V AC systems)

    B = −6 dB bandwidth in kHz (when B is less than 4.8 kHz, B = 4.8 may be used)
    D = duty cycle (e.g. D = 1.0 for continuous transmission)

(2) Band 535-1705 kHz: The level of the fundamental or harmonics falling within this band shall not exceed 1000 μV when measured across a 50 Ω LISN.

(3) Bands Above 1705 kHz: No conducted limits have been established.

3.4.2 Radiated Limits

An LISN shall not be used in this radiated emission test.

Emission of the fundamental frequencies from AC wire carrier current systems shall not exceed the general field strength limits in RSS-Gen, or the following:

  1. Band 1.705-10 MHz: The field strength shall not exceed 100 μV/m measured at 30 metres with an averaging meter. However, if the −6 dB bandwidth of the emission is less than 10% of the centre frequency, the field strength shall not exceed 15 microvolts/m or the bandwidth in kilohertz divided by the centre frequency in megahertz, whichever is the higher level.
  2. Band 6.765-6.795 MHz: The field strength measured at 30 metres shall not exceed the following limits:
    • 15.5 mV/m (84 dBμV/m) for emissions within the band;
    • 334 μV/m (50.5 dBμV/m) for emissions outside the band up to Fc ± 150 kHz;
    • 106 μV/m (40.5 dBμV/m) for emissions between Fc ± 150 kHz and Fc ± 450 kHz; and
    • the general field strength limits listed in RSS-Gen, except for harmonics, which shall not exceed 316 μV/m for emissions outside Fc ± 450 kHz.

      where Fc = 6.78 MHz.
  3. Band 13.553-13.567 MHz: The field strength measured at 30 metres shall not exceed the following limits:
    • 15.5 mV/m (84 dBμV/m) for emissions within the band;
    • 334 μV/m (50.5 dBμV/m) for emissions outside the band up to Fc ± 150 kHz;
    • 106 μV/m (40.5 dBμV/m) for emission between Fc ± 150 kHz and Fc ± 450 kHz; and
    • the general field strength limits listed in RSS-Gen for emissions outside Fc ± 450 kHz.

      where Fc = 13.56 MHz.
  4. Band 26.96-27.28 MHz: Section 3.8 limits shall apply.

3.5 Transmitters With Input Power of 6 nW or Less

Any transmitter that has a power consumption (total input power into the device) not exceeding 6 nW is excluded from any Industry Canada requirements and may operate on any radio frequency, including in the restricted frequency bands listed in RSS-Gen.

3.6 Band 0-9 kHz and Infrared Frequencies

Radio apparatus operating at 9 kHz or less and at infrared frequencies are excluded from any Industry Canada requirements.

3.7 Very Low-Power Devices Operating Below 490 kHz

Transmitters whose fundamental emission lies below 490 kHz and for which it is shown that all emissions are at least 40 dB below the general field strength limits listed in RSS-Gen, shall comply with the general provisions of RSS-310 and the applicable provisions of RSS-Gen.

3.8 Band 26.96-27.28 MHz

The field strength shall not exceed 10 mV/m measured at 3 metres with an average or a CISPR quasi-peak detector.

Outside this band, the general field strength limits listed in RSS-Gen shall apply.

3.9 Band 49.82-49.90 MHz

The field strength shall not exceed 10 mV/m measured at 3 metres with an average or a CISPR quasi-peak detector.

Outside this band, the general field strength limits listed in RSS-Gen shall apply.

Cordless telephones are not permitted to operate under the above provisions.

3.10 Band 24-24.25 GHz

The field strength shall not exceed 250 mV/m measured at 3 metres with an average detector.

The fundamental components of modulation shall lie within this band.

Emissions radiated outside the specified frequency band shall be attenuated by at least 50 dB below the level of the fundamental or to the general field strength limits listed in RSS-Gen, whichever is the less stringent.

The peak field strength of any emission shall not exceed the maximum permitted average limit specified above by more than 20 dB under any condition of modulation.

3.11 Data Modems

For data modems, unwanted emissions outside their intended bandwidth shall be adequately suppressed. Modems may be classified as one of two classes described below.

3.11.1 Data Modems for Connection to the Public Switched Telephone Network

Data modems intended to be connected to a public switched telephone network (PSTN) shall comply with Compliance Specification CS-03 and all applicable requirements in DC-01, Procedure for Declaration of Conformity and Registration of Terminal Equipment.

3.11.2 Data Modems for Connection to Radio Transmitter

If the data modem is a stand-alone unit (or part of a radio transmitter) and is intended for connection to the data port of a radio transmitter, the modem shall be tested to comply with Interference-Causing Equipment Standard ICES-003, Information Technology Equipment (ITE) — Limits and Methods of Measurement, as well as with the test described below. The data modem must also contain suitable audio filters or employ pulse shaping to limit the frequency spectrum, and have a level adjustment capability so that the user can set the frequency deviation of the radio transmitter. It should also have impedance that matches the radio transmitter data port. A suitable test method is given below. The objectives of the test are for the modem manufacturer to ascertain whether the pulse shaping/audio filtering, together with the appropriate frequency deviation, will limit the wanted signal bandwidth, and for the said modem manufacturer to issue proper instructions to the user to adjust the frequency deviation. Method of Measurement
Step 1:
Connect a data generator to the modem.
Step 2:
Connect the modem to the data port of any type of radio transmitter that has been certified by Industry Canada. Connect a spectrum analyzer to the RF output point of the transmitter.
Step 3:
Set the data generator rate to the maximum for which the modem is rated, with a pseudo-random pattern of at least 2047 bits.
Step 4:
The following information should be marked on the spectrum plots and kept by the manufacturer with the test report: data bit and symbol rates; input voltage to the radio transmitter data port; the manufacturer's name; as well as the model number of the data modem. Unwanted Emissions Requirement

The spectral density of unwanted emissions outside the intended passband of the radio channel shall be at least 20 dB below the in-band (or passband) spectral density as measured by a spectrum analyzer with a resolution bandwidth of approximately 1.0% of the radio transmitter's occupied bandwidth.

3.11.3 Labelling and Data Modem User Manual

Labelling shall comply with the above-mentioned DC-01 procedure, as appropriate. In addition, the data modem user manual shall contain instructions on how to adjust the frequency deviation, and shall notify the user regarding the maximum bit and symbol rates that the modem is capable of handling.

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