SRSP-302.0 — Technical Requirements for Fixed Line-of-Sight Radio Systems Operating in the Bands 2025-2110 MHz and 2200-2285 MHz

SRSP-302.0
Issue 1
July 8, 2000

Spectrum Management and Telecommunications Policy
Standard Radio System Plan

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1. Intent

1.1 This Standard Radio System Plan (SRSP) states the minimum technical requirements for the efficient use of the frequency bands 2025-2110 MHz and 2200-2285 MHz by medium, low and very low capacity digital line-of-sight radio systems and TV pick-up systems in the fixed service.

1.2 This SRSP is intended to be employed in the design and specification of radio systems and in the technical evaluation of applications for new radio facilities or modification to radio systems submitted in accordance with the current issue of Radio Standards Procedure 113 (RSP-113), Application Procedures for Planned Radio Stations Above 960 MHz in the Fixed Service.

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.

2. General

2.1 This Standard replaces SRSP-301.9 Issue 2. 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 this band.

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

2.4 Existing systems operating in the bands 2025-2110 MHz and 2200-2285 MHz and licensed in accordance with SRSP-301.9 Issue 2, are subject to the rules of SP GEN. Existing systems operating in the same band but licensed in accordance with GL-49 are considered as standard.

2.5 The Geographical Differences Policy (GDP) guideline applies in this frequency band. Existing and new fixed systems in uncongested areas, as defined by the GDP, may operate as standard provided they meet the SP and SRSP or have received approval from Industry Canada regarding exemption from certain SP and/or SRSP provisions. In areas of normal congestion, standard systems are expected to comply with the SP and SRSP. In areas designated as moderately congested, existing systems will be considered as standard if they meet the provisions of the SP and SRSP; new systems will also be expected to meet the enhanced provisions of the SP and SRSP (see section 8). In highly congested areas all new systems and those originally licensed for more than fifteen years must comply with the provisions and enhanced provisions of the SP and SRSP. More information on the GDP can be found in (SP 1-20 GHz), Revisions to Microwave Spectrum Utilization Policies in the Range of 1-20 GHz.

2.6 TV pick-ups share the 2025 to 2110 MHz band with point-to-point systems on an urban/rural basis, as outlined in paragraph 4.4.

2.7 In uncongested rural or remote areas, subscriber radio systems may be authorized under the GDP guideline.

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

2.9 Although a radio system conforms to the requirements of this SRSP, modifications may be required to the system whenever harmful interference1 is caused to other radio stations or systems.

2.10 Industry Canada may require the licensees and/or applicants to use receiver selectivity characteristics that provide rejection of harmful interference.

2.11 For point-to-point applications, Industry Canada encourages whenever possible the use of a two-frequency plan. Where reasonable economic or technical justification is provided (e.g. where siting prevents adequate antenna discrimination), extra frequencies may be used to resolve the problem.

3. Related Documents

3.1 The current issues of the following documents are applicable. Unless otherwise stated, they are available on the Internet at Industry Canada's Web site: http://www.ic.gc.ca/spectrum.

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

3.1.2 Spectrum Utilization Policies 1 - 20 GHz (SP 1 - 20 GHz) - Revisions to Microwave Spectrum Utilization Policies in the Range of 1-20 GHz.

3.1.3 Spectrum Utilization Policies 1 - 3 GHz (SP 1 - 3 GHz) - Amendments to the Microwave Spectrum Utilization Policies in the 1-3 GHz Frequency Range.

3.1.4 Radio Standards Procedure 113 (RSP-113) - Application Procedures for Planned Radio Stations Above 960 MHz in the Fixed Service.

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

3.1.6 Canadian Table of Frequency Allocations 9 kHz to 275 GHz.

3.1.7 Client Procedures Circular 2-0-03 (CPC-2-0-03) - Environmental Process, Radiofrequency Fields and Land-Use Consultation.

3.1.8 Safety Code 6 - Limits of Human Exposure to Radiofrequency Electromagnetic Fields in the Frequency Range from 3 kHz to 300 GHz, available on the Internet at Health Canada's Web site: http://www.hc-sc.gc.ca

4. Radio Frequency Channel Arrangement

4.1 Channel Plan for Medium Capacity Systems (See Table 2)

The preferred channel arrangement defined in this Standard provides for the development of multi-hop radio systems transmitting up to eight two-way RF channels. The frequency separation between Go and Return RF channels is 175 MHz.

Lower half of the band A(n) = 2022.5 + 10n
Upper half of the band A'(n) = 2197.5 + 10n

where: n = 1 to 8 , and A(n), A'(n) are the centre frequencies of the paired channels.

4.1.1 If it can be demonstrated that an incremental channel is needed for growth, a 20 MHz channel comprised of two adjacent 10 MHz channels, may be permitted on a case-by-case basis, subject to the availability of assignments and frequency congestion.

4.2 Channel Plan for Low Capacity Systems (See Table 2)

4.2.1 7.5 MHz Channels

The preferred channel arrangement defined in this Standard provides for the development of multi-hop radio systems transmitting up to eleven two-way RF channels. The frequency separation between Go and Return RF channels is 175 MHz.

Lower half of the band B(n) = 2022.5 + 7.5n
Upper half of the band B'(n) = 2197.5 + 7.5n

where: n = 1 to 11, and B(n), B'(n) are the centre frequencies of the paired channels.

4.2.2 5.0 MHz Channels

The preferred channel arrangement defined in this Standard provides for the development of multi-hop radio systems transmitting up to sixteen two-way RF channels. The frequency separation between Go and Return RF channels is 175 MHz.

Lower half of the band C(n) = 2025 + 5n
Upper half of the band C'(n) = 2200 + 5n

where: n = 1 to 16 , and C(n), C'(n) are the centre frequencies of the paired channels.

4.2.3 2.5 MHz Channels

The preferred channel arrangement defined in this Standard provides for the development of multi-hop radio systems transmitting up to thirty-three two-way RF channels. The frequency separation between Go and Return RF channels is 175 MHz.

Lower half of the band D(n) = 2025 + 2.5n
Upper half of the band D'(n) = 2200 + 2.5n

where: n = 1 to 33, and D(n), D'(n) are the centre frequencies of the paired channels.

4.2.4 1.25 MHz Channels

The preferred channel arrangement defined in this Standard provides for the development of multi-hop radio systems transmitting up to sixty-six two-way RF channels. The frequency separation between Go and Return RF channels is 175 MHz.

Lower half of the band E(n) = 2025 + 1.25n
Upper half of the band E'(n) = 2200 + 1.25n

where: n = 1 to 66 , and E(n), E'(n) are the centre frequencies of the paired channels.

4.3 Channel Plan for Very Low Capacity Systems

4.3.1 50 kHz Channels

The preferred channel arrangement defined in this Standard provides for the development of radio systems transmitting up to two hundred two-way RF channels. The frequency separation between Go and Return RF channels is 175 MHz.

Lower half of the band F(n) = 2025.975 + 0.05n
Upper half of the band F'(n) = 2200.975 + 0.05n

where: n = 1 to 200 , and F(n), F'(n) are the centre frequencies of the paired channels.

4.4 TV Pick-Up Channel Assignments (See Table 3)

The preferred channel arrangement defined in this Standard provides for the development of TV pick-up systems transmitting up to seven 12 MHz one-way RF channels in the 2025 to 2110 MHz band. In the major metropolitan areas of greater Toronto, Montreal and Vancouver, preference will be given to TV pick-ups. Elsewhere, the level of priority access given to TV pick-ups will be at the discretion of the regional offices. To the extent possible, TV pick-up usage should avoid the spectrum designated for very low capacity systems.

Lower half of the band G(n) = 2019.5 + 12n

where: n = 1 to 7, and G(n) is the centre frequency of the channel.

Due to the large area affected by helicopter usage of TV Pick-ups, some restrictions on the number of TV Pick-up channels available for this application may be applied by the regional offices. These restrictions may be based on consideration of factors such as frequency assignment re-use, availability of assignments in other TV Pick-up bands and co-existence with point-to-point systems.

Note: The TV Pick-up channel plan is harmonized with US, and may be changed in accordance with the future changes and availability of equipment.

4.5 Branching or Spur Route Channels

The frequencies assigned to a main route system should be re-used on the branching or spur routes where possible. At the discretion of Industry Canada, the branching or spur routes may use, within the hop associated with the junction or break-out point, frequencies in the bands 2025-2110 MHz and 2200-2285 MHz other than those employed on the associated main route, if route conditions do not allow the re-use of the same frequencies. In such cases, these branching or spur routes should revert to the frequencies employed on the main route as soon as technically possible after the junction or break-out point.

4.6 Closed Loops

Systems must be designed so that any closed loop will comprise an even number of hops.

4.7 Growth Pattern

New medium capacity systems in this band should use the highest available frequency pair that can be successfully coordinated starting at channels A8 and A8'. New low capacity systems in this band should use the lowest available frequency pair that can be successfully coordinated starting at channels B2 & B2', C3 & C3', D4 & D4', or E7 & E7'.

4.8 Spectral Efficiency

Digital systems submitted for licensing must have the capability of achieving a spectral efficiency of at least 2.4 bits/s/Hz within the allocated RF channel bandwidth for medium capacity systems and at least 0.6 bit/s/Hz for low and very low capacity systems on a single polarization.

4.9 Protection Channels

Protection channels are not permitted in this band; however, frequency plus space diversity applications will be considered on a case-by-case basis to solve special problems.

5. Transmitter Characteristics

5.1 Use of automatic transmit power control (ATPC) is encouraged in this band. The nominal transmitter power should be a minimum of 10dB below the maximum rated transmitter power.

5.2 The transmitter power delivered to the antenna input shall not exceed the limits per RF channel shown in Table 1 below.

Table 1

Bandwidth (MHz) Power Limit Watts (dBW)
10 10.0 (+10)
7 10.0 (+10)
5 5.0 (+7)
2.5 2.0 (+3)
1.25 1.0 (0)
0.05 1.0 (0)

5.3 An increase in transmitter power over the above-specified limit may be permitted if technical justification is provided. In no event will the power delivered to the antenna input be permitted to exceed 20 watts (+13dBW) per channel.

5.4 The centre frequency of the emission shall be maintained within ± 0.001% of the assigned frequency.

5.5 Digital Transmission Spectrum Control

5.5.1 Medium Capacity Systems

In any 4 kHz band, the centre frequency of which is removed from the assigned frequency by more than 50% up to and including 250% of the authorized bandwidth, the mean power of emission shall be attenuated below the mean output power of the transmitter in accordance with the following equation:

A = 35 + 0.8 (P - 50) + 10 log10B

where:
A = Attenuation (in dB) below the mean output power level
P = Percent removed from the centre frequency of the assigned RF channel
B = Authorized bandwidth (in MHz)

Note:

  1. Attenuation shall always be greater than or equal to 50 dB.
  2. Attenuation greater than 80 dB is not necessary.

In any 4 kHz band, the centre frequency of which is removed from the assigned frequency by more than 250% of the authorized bandwidth, the mean power of emission shall be attenuated by 43 + 10 log10 (mean output power in watts) dB, or 80 dB, whichever is the lesser attenuation.

5.5.2 Other Systems

For LC, VLC and TV pick-up systems, at least 99% of the power from the transmitter shall be contained within the licensed bandwidth.

6. Antenna Characteristics

6.1 For medium capacity systems, the co-polarized radiation pattern envelope in the horizontal plane of the antenna must remain within envelope B shown in Figure 1 for both vertical and horizontal polarizations.

6.2 For low capacity systems, the co-polarized radiation pattern envelope in the horizontal plane of the antenna must remain within envelope C shown in Figure 1 for both vertical and horizontal polarizations.

6.3 For very low capacity systems, the co-polarized radiation pattern envelope in the horizontal plane of the antenna must remain within envelope D shown in Figure 1 for both vertical and horizontal polarizations.

6.4 For TV pick-up systems, the use of highly directive antenna systems is encouraged.

6.5 As guidance, to protect against geostationary-satellite space station emissions2, users of fixed service station receive antennas in the band 2025-2110 MHz should take into consideration the following specific locations on the geostationary-satellite orbit: 16.4°E, 21.5°E, 160°E, 177.5°E, 16°W, 32°W, 41°W, 44°W, 46°W, 49°W, 62°W, 139°W, 160°W, 170°W, 171°W, and 174°W.

7. Maximum Equivalent Isotropically Radiated Power (EIRP)

7.1 As far as practicable, new sites for transmitting stations in the fixed service, operating in the band 2200-2285 MHz, should avoid radiating at an EIRP density greater than +8 dBW/MHz towards the geostationary-satellite orbit locations listed in paragraph 6.5, taking into account the effect of atmospheric refraction. This restriction may be exceeded up to 0.1% of the time by FS stations employing ATPC.

7.2 Those fixed service transmit stations which do not employ ATPC and are unable to comply with paragraph 7.1 should operate in the lower part of the band 2200-2285 MHz, if channels are available.

7.3 The maximum EIRP from the antenna must not in any case exceed +55 dBW per RF channel.

8. Enhanced Technical Requirements for Moderately Congested and Highly Congested Areas

8.1 For low and medium capacity systems, the co-polarized radiation pattern envelope in the horizontal plane of the antenna must remain within envelope A shown in Figure 1 for both vertical and horizontal polarizations.

Issued under the authority of
the Minister of Industry

R.W. McCaughern
Director General
Spectrum Engineering Branch

Figure 1. Minimum Antenna Characteristic

Table 2. Upper 2 GHz Medium and Low Capacity Frequency Plan

Table 2. Upper 2 GHz Medium and Low Capacity Frequency Plan

Table 3. Upper 2 GHz TV Pick-Up Frequency Plan

Pick-Up Channels
G1 2031.50
G2 2043.50
G3 2055.50
G4 2067.50
G5 2079.50
G6 2091.50
G7 2103.50

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.

2 It should be noted that, as a condition for bandsharing with terrestrial services, the power flux-density limits of RR S21 apply to the space science services in the bands 2025-2110 MHz and 2200-2285 MHz, these limits being:

-154 dB (W/m2) in any 4 kHz band for angles of arrival between 0 and 5 degrees above the horizontal plane; -154 + 0.5(ä -5) dB (W/m2) in any 4 kHz band for angles of arrival (in degrees) between 5 and 25 degrees above the horizontal plane; -144 dB (W/m2) in any 4 kHz band for angles of arrival between 25 and 90 degrees above the horizontal plane.