Issue 2
February 2009
Spectrum Management and Telecommunications
Radio Standards Specification
Preface
Radio Standards Specification 137, Issue 2, Location and Monitoring Service in the Band 902-928 MHz , replaces Issue 1, Revision 1 of RSS -137, dated September 25, 1999.
This document will be in force as of the publication date of Notice SMSE -003-09 in Canada Gazette, Part I. Upon publication, the public has 120 days to submit comments. The comments received will be taken into account in the preparation of the next version of the document.
Listed below are the changes:
- General reformatting and transfer of material common to most RSS to RSS-Gen.
- Section 2.1: Low-power mobile transponders with integral antennas that respond only to a received radio signal have been exempted from licensing.
- Section 3.1: The requirement that RSS-Gen be used in conjunction with this standard is stated.
- Section 6: The standard specification for transmitters has been revised to harmonize with the current standard.
Issued under the authority of the Minister of Industry
Marc Dupuis
Director General
Spectrum Engineering Branch
1. Scope
This Radio Standards Specification (RSS) sets out requirements for the certification of radio equipment for the location and monitoring service (LMS) in the band 902-928 MHz.
2. General Information
Equipment certified under this standard is classified as Category I equipment, and a technical acceptance certificate (TAC), issued by the Certification and Engineering Bureau of Industry Canada, or a certificate issued by a Certification Body (CB), is required.
2.1 Licensing Requirements
Equipment covered by this standard is subject to licensing pursuant to subsection 4(1) of the Radiocommunication Act. However, mobile transponders certified under this standard that have integral antennas, produced power lower than 3 mW, and respond only to a received radio signal shall be exempted from licensing.
2.2 Definitions
Multilateral system (M-LMS) is a system that uses several base stations to locate a mobile station by triangulation. It is primarily intended for locating vehicles, but the service may be used for other locating functions provided that vehicle locating is the primary function of the system.
Non-Multilateral system (N-LMS) is a system that uses one transmitter for its operation. It is primarily intended for the transmission of data signals to and from vehicles, such as for road toll collection.
Wideband transmitter is a transmitter that has an emission occupying more than a 50 kHz bandwidth.
3. General Requirements
3.1 RSS-Gen Compliance
RSS-137 shall be used in conjunction with RSS-Gen, General Requirements and Information for the Certification of Radiocommunication Equipment, for general specifications and information relevant to the equipment to which this standard applies.
4. Measurement Method
4.1 Transmitter Output Power
The transmitter power and unwanted emissions shall be measured in peak value.
4.2 Transmitter Unwanted Emissions
The unwanted emissions power shall be measured with a resolution bandwidth of 100 kHz; however, in the case of emission mask B in section 6.5.2, a resolution of 300 Hz shall be used for measuring centre frequencies within 1 MHz of the equipment operating sub-band edges.
5. General Standard Specifications
A detailed description of the system (base and mobile stations) shall accompany the certification application.
6. Transmitter and Receiver Standard Specifications
6.1 Frequency Band and Occupied Bandwidth
6.1.1 Multilateral LMS Systems
| Reverse Link(Footnote Note 1) | Associated Forward Link |
|---|---|
| 904-909.75 | 927.75-928 |
| 919.75-921.75 | 927.5-927.75 |
| 921.75-927.25 | 927.25-927.5 |
| Multilateral LMS Sub-band (MHz) |
Maximum Occupied Bandwidth Permitted (Footnote Note 2) (MHz) |
|---|---|
| 904-909.75 | 5.75 |
| 919.75-921.75 | 2 |
| 921.75-927.25 | 5.50 |
| 927.25-927.5 | 0.25 |
| 927.5-927.75 | 0.25 |
| 927.75-928 | 0.25 |
6.1.2 Non-Multilateral LMS Systems
| Non-Multilateral LMS Sub-band (MHz) |
Maximum Occupied Bandwidth Permitted (MHz) |
|---|---|
| 902-904 | 2 |
909.75-921.75 |
12 |
6.2 Types of Modulation
The devices may employ any type of modulation technique. The type of modulation used must be reported.
6.3 Frequency Stability
The carrier frequency shall not depart from the reference frequency in excess of ±2.5 ppm for any type of equipment unless indicated otherwise.
Fixed N-LMS transmitters with an emission bandwidth located more than 40 kHz from the band edge, intermittently operated hand-held readers and mobile transponders are exempt from meeting the frequency stability limit.
6.4 Transmitter Output Power
The output power shall be within ±1.0 dB of the manufacturer's rated value, and the e.r.p. shall not exceed 30 watts for the band 902-927.25 MHz and 300 watts for the band 927.25-928 MHz.
6.5 Transmitter Unwanted Emissions
The LMS sub-band edges for multilateral LMS systems for which unwanted emissions shall be attenuated are specified in section 6.1.1.
6.5.1 Emission Mask A – Wideband Multilateral Transmitters
Except as provided in section 6.5.4, the unwanted emission limits for wideband multilateral transmitters operating in the sub-bands 904-909.75 MHz, 919.75-921.75 MHz, and 921.75-927.25 MHz shall comply with the following:
In any 100 kHz band outside the equipment operating sub-band edge, the power of emissions shall be attenuated below the maximum permitted transmitter output power, Pmax, by the following equation:
16 + 0.4(fd - 50) + 10 log10 B dB, or 31 dB, whichever is more stringent (attenuation greater than 66 dB is not required).
Where:
- B is the occupied bandwidth in MHz; and
- fd is the magnitude of the difference between the centre frequency of the measurement bandwidth and the centre frequency of the equipment operating sub-band, expressed as a percentage of the occupied bandwidth.
6.5.2 Emission Mask B – Narrowband Multilateral Forward Link Transmitters
For narrowband multilateral forward link transmitters operating in the band 927.25-928 MHz, the power of any emission outside the equipment operating sub-band edge shall be attenuated below the maximum permitted transmitter output power, Pmax , by at least:
116 log10 ((fed+10)/6.1) dB or 50 + 10 log10 Pmax dB, or 70 dB, whichever is less stringent.
Where:
- fed is the magnitude of the difference between the centre frequency of the measurement bandwidth and the equipment operating sub-band edge, expressed as a percentage of the occupied bandwidth.
6.5.3 Emission Mask C – Other Transmitters
Except as provided in sections 6.5.1, 6.5.2 and 6.5.4, the unwanted emission of all other transmitters operating in the band 902-928 MHz shall comply with the following:
The power of any emission outside the equipment operating sub-band edge shall be attenuated below the maximum permitted output power Pmax by at least 55 + 10 log10 Pmax dB.
6.5.4 Emission Mask D – Intermittent Transmitters
In the band 902-928 MHz, mobile transponders with integral antennas (i.e. transmitters that respond only to a received radio signal) and intermittently operated hand-held transmitters shall not be required to comply with the above emission masks, provided that their 20 dB bandwidth does not exceed the maximum occupied bandwidth permitted. In addition, on any frequency distanced from the carrier frequency by more than 250% of the occupied bandwidth, the power of any emission shall be attenuated below the maximum permitted transmitter output power, Pmax, by at least 43 + 10 log10 Pmax dB, measured in a bandwidth of 100 kHz.
6.6 Receiver Spurious Emissions
Receiver spurious emissions shall comply with the limits specified in RSS-Gen.