RSS-210, Amendment 1 — Licence-Exempt, Low-Power Radio Apparatus Operating in the Television Bands

Posted on Industry Canada website:
Issue 8, Amendment 1

Preface

Low-power radio apparatus (LPA) that is operating in the television broadcasting bands — and is also used for white space (WS) technology — has been moved from Radio Standards Specification RSS-123, Licensed Low-Power Radio Apparatus, to Radio Standards Specification RSS-210, Licence-Exempt Radio Apparatus (All Frequency Bands): Category I Equipment. More specifically, LPA operating in the 54-72 MHz, 76-88 MHz, 174-216 MHz, 470-608  MHz and 614-698 MHz frequency bands has been moved to RSS-210. Note that LPA operating in other bands has remained in RSS-123 and is subject to licensing pursuant to subsection 4(1) of the Radiocommunication Act. As such, the requirements of RSS-210 now apply to this apparatus in addition to the specific requirements established herein.

Issued under the authority of
the Minister of Industry


Daniel Duguay
Director General
Engineering, Planning and Standards Branch


1. Scope

This document, Licence-Exempt, Low-Power Radio Apparatus Operating in the Television Bands, is an amendment to Radio Standards Specification RSS- 210, Issue 8, and this amendment sets out the technical requirements for the compliance of licence-exempt, Category I radio apparatus operating in the 54-72 MHz, 76- 88 MHz, 174-216 MHz, 470-608 MHz and 614-698 MHz frequency bands.


2. General

2.1 Purpose and Application

Low-power radio apparatus (LPA) refers to radio equipment that generally transmits signals at low-power levels. LPA can be divided into two categories: low-power auxiliary equipment and wireless cameras.

Low-power auxiliary equipment refers to wireless microphones, cue and control communications and synchronization of video camera signals. FM transmitters may also be included in that category, but they are restricted and may only be authorized under certain conditions described in Client Procedures Circular CPC-2-1-28, Voluntary Licensing for Licence-Exempt Low-Power Radio Apparatus in the TV Bands.

This Certification Body (CB) Notice is in force immediately and will be reflected in the next issue of RSS-210.


3. Related Documents

All Spectrum Management and Telecommunications publications are available on the following website: http://www.ic.gc.ca/spectrum, under Official Publications.

In addition to the related documents specified in RSS-Gen, General Requirements for Compliance of Radio Apparatus, the following documents should be consulted:

RIC-66Addresses and Telephone Numbers of Regional and District Offices

SAB-001-10Low-power Licensed Radiocommunication Devices, Including Wireless Microphones, in the Band 698-806 MHz

CPC-2-1-11Licensed Low-power Radio Apparatus

CPC-2-1-28Voluntary Licensing for Licence-Exempt Low-Power Radio Apparatus in the TV Bands


4. User Manual

The following text shall be included in the equipment’s user manual:

  • This device operates on a no-protection no-interference basis. Should the user seek to obtain protection from other radio services operating in the same TV bands, a radio licence is required. Please consult Industry Canada's document CPC-2-1-28, Optional Licensing for Low-Power Radio Apparatus in the TV Bands, for details.

5. Measurement Method

5.1 Low-Power Auxiliary Equipment

The transmit power shall be measured in average value (PMEAN) as a conducted emission over any period of continuous transmission.

5.2 Wireless Cameras

In the case of wireless cameras, the transmit power shall be measured in average value (PMEAN) as a radiated emission over any period of continuous transmission for wireless cameras employing FM or a digital modulation.

For any National Television System Committee (NTSC) equipment, measurement shall be carried out as a radiated emission in terms of the peak envelope transmitter power (PPEAK) over a period of continuous transmission. The aural (audio) carrier shall be unmodulated and the visual carrier shall be modulated with normal blanking level synchronizing signals.

5.3 Additional Measurement Method Requirements

In addition to the measurement requirements of sections 5.1 and 5.2, the following measurement requirements shall apply, if the modulation scheme addressed herein is used.

5.3.1 Amplitude Modulation

In conjunction with the measurement method described in RSS-Gen for the measurement of the output power, the transmitter shall be operated at the manufacturer’s rated power and modulated with signals as follows:

  • A test signal at an audio frequency of 1250 Hz shall be applied to the transmitter. Its level shall first be adjusted to obtain a modulation depth of 60%. The test signal’s level shall then be adjusted to 20 dB above the level required to obtain a modulation depth of 60%.

5.3.2 Frequency Modulation

In conjunction with the measurement method described in RSS-Gen for the measurement of the output power, the transmitter shall be operated at the manufacturer’s rated power and modulated with signals as follows:

  • Modulate the transmitter with a 2.5 kHz tone at a level 16 dB higher than that required to produce a frequency deviation of ± 75 kHz, or to produce 50% of the manufacturer’s rated deviation, whichever is less.

5.3.3 Other Modulation Schemes

In conjunction with the measurement method described in RSS-Gen for the measurement of the output power, the transmitter shall be operated at the manufacturer’s rated power and modulated with signals as follows:

  • For transmitters employing neither AM nor FM, a signal typical of those encountered in a real operating system should be used. However, if the transmission is not continuous, this must be indicated in the test report.

6. Transmitter and Receiver Standard Specifications

6.1 Frequency Band Allocations

All the bands in Table 1 may be used for low-power auxiliary equipment, one- or two-way communication. Table 2 lists the frequency bands for wireless cameras.

Table 1: Low-Power Auxiliary Equipment Limits
Frequency Bands (MHz) Transmit Power PMEAN(mW) Authorized Bandwidth (kHz) Frequency Stability (ppm)
54-72
76-88
174-216
50 200 ± 50
470-608
614-698
250 200 ± 50
Table 2: Wireless Cameras
Frequency Bands (MHz) Effective Radiated Power (W) Authorized Bandwidth (MHz) Frequency Stability (ppm)
54-72
76-88
174-216
470-608
614-698
1Footnote * 6 ± 30

6.2 Occupied Bandwidth

The occupied bandwidth as defined in RSS-Gen shall not exceed the authorized bandwidth specified in Table 1 and Table 2 for low-power auxiliary and wireless cameras, respectively.

6.3 Transmitter Frequency Stability

The frequency stability of low-power auxiliary equipment and wireless cameras shall comply with the limits specified in Table 1 and Table 2, respectively, when tested under the frequency stability testing condition specified in RSS-Gen.

6.4 Transmitter Unwanted Emissions

6.4.1 Low-Power Auxiliary Equipment

The power of unwanted emissions (measured with a resolution bandwidth of 1% of the authorized bandwidth) shall be attenuated below the mean output power, PMEAN in dBW, of the transmitter, as follows:

  • at least 25 dB on any frequency that is removed from the operating frequency by more than 50%, up to and including 100% of the authorized bandwidth; and
  • at least 35 dB on any frequency that is removed from the operating frequency by more than 100%, up to and including 250% of the authorized bandwidth.

The power of unwanted emissions (measured with a resolution bandwidth of 30 kHz) shall be attenuated below the mean output power, PMEAN in dBW, of the transmitter, as follows:

  • at least 55 + 10log10 (pMEAN in Watts) dB on any frequency removed from the operating frequency by more than 250% of the authorized bandwidth.

6.4.2 Wireless Cameras

For NTSC equipment, the power spectral density of intermodulation products at –4.5 MHz and +9.0 MHz with respect to the visual carrier shall not exceed −36 dBW/4 kHz. Elsewhere, the power spectral density outside of the channel bandwidth shall not exceed −46 dBW/4 kHz.

For FM and digital modulation, the power spectral density outside of the channel bandwidth shall not exceed –46 dBW/4 kHz.

6.5 Receiver Spurious Emissions

The receiver-spurious emissions shall comply with the limits specified in RSS-Gen.

6.6 Modulation

The devices may employ any type of modulation. The type of modulation used shall be reported in the test report.

6.6.1 Amplitude Modulation

In addition to the measurement method of Section 5.3.1, the following measurement procedure shall be followed:

  • The frequency of the test signal shall then be varied between 50 Hz and 10 kHz and the modulation depth measured. The modulation depth shall be measured using any appropriate measurement equipment capable of measuring amplitude modulation depth, i.e. modulation analyzer, spectrum analyzer, etc.

For low-power auxiliary equipment employing amplitude modulation (AM), the modulation shall not exceed 100% on positive or negative peaks.

6.6.2 Frequency Modulation

In conjunction with the measurement method described in RSS-Gen for the measurement of the output power, the transmitter shall be operated at the manufacturer’s rated power and modulated with signals as follows:

  • A test signal at an audio frequency of 1 kHz shall be applied to the transmitter. Its level shall first be adjusted to obtain a frequency deviation of ±45 kHz. The test signal’s level shall then be adjusted to 20 dB above the level required to obtain a frequency deviation of ±45 kHz. The frequency of the test signal shall then be varied between 50 Hz and 15 kHz. If ±45 kHz is unobtainable, then the maximum deviation shall be used. The maximum deviation shall be measured using any appropriate measurement equipment capable of measuring frequency deviation (i.e. modulation analyzer, spectrum analyzer, etc.).

Low-power auxiliary equipment using FM may employ a frequency deviation up to a maximum of ±75 kHz.

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