SRSP-507 — Technical Requirements for Line-of-Sight Radio Systems Operating in the Fixed Service in the Bands 932.5-935 MHz and 941.5-944 MHz

Technical Requirements for Line-of-Sight Radio Systems Operating in the Fixed Service in the Bands 932.5 - 935 MHz and 941.5 - 944 MHz
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Issue 2
Effective date: December 9, 1995

Spectrum Management
Standard Radio System Plan

1. Intent

1.1 This Standard Radio System Plan (SRSP) states the minimum technical requirements to operate fixed, single or multi-hop point-to-point communication systems in the bands 932.5-935 MHz and 941.5-944 MHz. Fixed point-to-point systems operating in these bands may be one-way or two-way, very low capacity, employing analogue or digital modulation techniques.

1.2 This SRSP is intended to be employed in the design and specification of radio systems and equipment and in the evaluation of technical applications for new radio facilities or of modification to existing radio facilities submitted in accordance with the current issue of Radio Standards Procedure (RSP) 101.

1.3 This SRSP specifies equipment characteristics relating to efficient spectrum usage only and is not to be regarded as a comprehensive specification for equipment design and/or selection. Equipment having a necessary bandwidth less than or equal to 16 kHz requires certification as per Radio Standards Procedure (RSP) 100.

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2. General

2.1 This Standard replaces SRSP-507 Issue 1. Revision of this SRSP will be made as required.

2.2 Radio systems conforming to these technical requirements will be given priority in licensing over non-standard radio systems operating in these bands. Preference will be afforded to agencies and Government providing safety of life and protection of property and natural resources. Other Government services will be authorized on the same priority basis as public access systems (ones which provide service to subscribers, in other words service to the public) rather than private systems whose use is limited to their own group of users.

2.3 The arrangements for non-standard systems are outlined in SP-GEN, General Information Related to Spectrum Utilization and Radio System Policies.

2.4 Although a radio system conforms with the requirements of this SRSP, modifications may be required to the system whenever harmful interferenceFootnote 1 is caused, except when such interference is due to inadequate receiver selectivity as dealt with under 2.5.

2.5 Industry Canada will provide protection to licensed radio receivers only to the extent of their necessary bandwidth. Licensees and/or applicants should use receiver selectivity characteristics or filters that provide rejection of harmful interference.

2.6 When potential conflict between radio systems cannot be resolved by the parties concerned, Industry Canada should be advised and after consultation with the parties concerned, will determine the necessary modifications and schedule of modifications to resolve the conflict.

2.7 Where a high demand for use of this band is expected, Industry Canada may require system changes to ensure efficient use of the spectrum.

2.8 As the bands specified in this standard are shared with the United States in the border area, prior coordination between Canada and the United States will be required to avoid harmful interference and to ensure equal access by both countries.

2.9 It should be noted that the fixed terrestrial services share this band with other services in accordance with the Table of Frequency Allocations 9 kHz to 275 GHz.

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3. Related Documents

3.1 The current issues of the following documents are applicable:

3.1.1 Spectrum Utilization Policy GEN (SP-GEN) - General Information Related to Spectrum Utilization and Radio Systems Policies.

3.1.2 Spectrum Utilization Policy (SP) 896 MHz - Spectrum Utilization Policy for the Fixed, Mobile, Radiolocation and Amateur Services in the Band 896960 MHz.

3.1.3 Radio Standards Procedure (RSP) 100 - Certification of Radio Equipment.

3.1.4 Radio Standards Procedure (RSP) 101 - Application Procedure for Planned Radio Stations Operating on Frequencies below 960 MHz.

3.1.5 Telecommunications Regulation Circular (TRC) 43 - Notes Regarding Designation of Emissions (Including Necessary Bandwidth and Classification), Class of Station and Nature of Service.

3.1.6 Radio Standards Specification (RSS) 119 - Land and Mobiles Stations, 27.41-960 MHz, 20-30 kHz Channelling.

3.1.7 Radio Standards Specification (RSS) 122 - Land and Mobile Stations, 400-960 MHz, 12.5 kHz Channelling.

3.2 The above documents are available on request from Industry Canada Headquarters in Ottawa or from Regional Offices of the Department located in Vancouver, Winnipeg, Toronto, Montreal and Moncton.

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4. Radio Frequency Channel Arrangement Description

4.1 Radio Frequency Channel Arrangements

The radio frequency channel arrangements defined in this Standard provides for 5 different RF channel bandwidths. Channel pairs are provided with a common transmit/receive separation of 9 MHz.

Channel bandwidths:
12.5 kHz
25 kHz
50 kHz
100 kHz
200 kHz

4.2 Radio Frequency Channel Centre Frequencies

4.2.1 The centre frequencies of the 200 paired channels which allow RF channel bandwidths of 12.5 kHz are expressed by the following relationships:

Lower half of the band An = 932.49375 + 0.0125n for n = 1 to 200
Upper half of the band A'n = 941.49375 + 0.0125n for n = 1 to 200

where n is the channel number and An and A'n are the centre frequencies in MHz of the paired channels.

4.2.2 The centre frequencies of the 100 paired channels which allow RF channel bandwidths of 25 kHz are expressed by the following relationships:

Lower half of the band Bn = 932.4875 + 0.025n for n = 1 to 100
Upper half of the band B' n = 941.4875 + 0.025n for n = 1 to 100

where n is the channel number and Bn and B'n are the centre frequencies in MHz of the paired channels.

4.2.3 The centre frequencies of the 50 paired channels which allow RF channel bandwidths of 50 kHz are expressed by the following relationships:

Lower half of the band Cn = 932.475 + 0.05n for n = 1 to 50
Upper half of the band C' n = 941.475 + 0.05n for n = 1 to 50

where n is the channel number and C and C' are the centre frequencies in MHz of the paired channels.

4.2.4 The centre frequencies of the 25 paired channels which allow RF channel bandwidths of 100 kHz are expressed by the following relationships:

Lower half of the band Dn = 932.45 + 0.1n for n = 1 to 25
Upper half of the band D' n = 941.45 + 0.1n for n = 1 to 25

where n is the channel number and Dn and D'n are the centre frequencies in MHz of the paired channels.

4.2.5 The centre frequencies of the 12 paired channels which allow RF channel bandwidths of 200 kHz are expressed by the following relationships:

Lower half of the band En = 932.4 + 0.2n for n = 1 to 12
Upper half of the band E' n = 941.4 + 0.2n for n = 1 to 12

where n is the channel number, and En and E'n are the centre frequencies in MHz of the paired channels.

4.3 Assignment of Frequencies

New radio systems in this band employing 12.5 or 25 kHz channels should use the lowest available frequency channel that can be successfully coordinated. New radio systems employing 100 or 200 kHz channels should use the highest available frequency channel that can be successfully coordinated. Finally, new radio systems employing 50 kHz channels should use mid-band channels starting at C25/C'25.

4.4 Spectral Efficiency

Digital systems submitted for licensing and using channels larger than 12.5 kHz shall have a minimum spectral efficiency of 0.6 bit/s/Hz of the RF channel bandwidth on a single polarization.

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5. Transmitter Characteristics

5.1 The centre frequency of the emission shall be maintained within ±0.00025% of the assigned frequency.

5.2 Maximum Equivalent Isotropically Radiated Power

5.2.1 The maximum Equivalent Isotropically Radiated Power (EIRP) from the antenna shall not exceed 40 dBW. Further, the maximum cumulative EIRP from the antenna over any given 200 kHz bandwidth channels as defined in Section 4.1 shall not exceed 40 dBW. An increase in EIRP over the above specified limits may be permitted where adequate justification is provided.

5.2.2 As per the Canada/United States Arrangements, the maximum Equivalent Isotropically Radiated Power (EIRP) from the antenna shall not exceed 30 dBW in the border area.

5.2.3 For stations operating within the boundaries of metropolitan areas and transmitting to rural areas, the band 932.5-935 MHz should be used as the transmit with 941.5-944 MHz used as the receive band.

5.2.4 Should it be necessary for stations within the boundaries of metropolitan areas to transmit in the band 941.5-944 MHz, the following EIRP limits would apply:

EIRP Limits
Frequency Band (MHz) EIRP (dBW)
941.5-942.5 30
942.5-943.5 20
943.5-944.0 15

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6. Antenna Characteristics

6.1 Within the Canada-United States coordination zoneFootnote 2, stations must employ antennas that meet the performance standards for Category A, except that, subject to frequency coordination, antennas meeting standards for Category B may be employed. Note, however, that the use of high performance antennas (Category A or better) will be required where interference problems can be resolved by the use of such antennas.

6.2 Outside the Canada-United States coordination zone, and subject to frequency coordination, antennas meeting standards for Category C may be used.

Antenna Characteristics
Antenna Type Beamwidth to 3 dB Maximum points Minimum radiation suppression to angle in degrees from centerline of main beam in decibels
(included angle in degrees) 5° to 10° 10° to 15° 15° to 20° 20° to 30° 30° to 40° 40° to 100° 100° to 140° 140° to 180°
Category A 14 - 6 11 14 17 17 20 24
Category B 20 - - 6 10 13 13 15 20
Category C 20 - - 6 8 10 13 15 20

Issued under the authority of the Minister of Industry Canada

G.R. Begley
Director General
Spectrum Engineering

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Footnotes

Footnote 1

For the purpose of this SRSP, harmful interference means interference which endangers the functioning of a radionavigation service or of other safety services or seriously degrades, obstructs, or repeatedly interrupts a radiocommunication service operating in accordance with regulations and technical requirements laid down by Industry Canada under the Radiocommunication Act.

Return to footnote 1 referrer

Footnote 2

For a station the antenna of which looks within the 200° sector toward the Canada-United States borders, that area in each country within 120 km of the borders; and

For a station the antenna of which looks within the 160° sector away from the Canada-UnitedStates borders, that area in each country within 60 km of the borders.

Return to footnote 2 referrer

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