SRSP-307.7 — Technical Requirements for Fixed Line–of–Sight Radio Systems Operating in the Band 7725–8275 MHz

Issue 6
December 2006

Spectrum Management and Telecommunications
Standard Radio System Plan

Preface

Issue 6 of SRSP–307.7 has been released to incorporate refinements to the minimum antenna characteristics and emission limits. This SRSP replaces SRSP–307.7, Issue 5.

Issued under the authority of the Minister of Industry

space to insert signature
R.W. McCaughern
Director General
Spectrum Engineering Branch

Contents

  1. Intent
  2. General
  3. Related Documents
  4. Radio Frequency Channel Arrangement Description
  5. Transmitter Characteristics
  6. Antenna Characteristics
  7. Maximum Equivalent Isotropically Radiated Power
  8. Avoidance of the Geostationary–satellite Orbit

1. Intent

1.1 This Standard Radio System Plan (SRSP) states the minimum technical requirements for the efficient use of the band 7725–8275 MHz by low, medium and high–capacity (LC, MC and HC) point–to–point radio systems in the fixed service using digital modulation.

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 modification to radio systems submitted in accordance with the current issue of Radio Standards Procedure 113, Application Procedures for Planned Radio Stations Above 960 MHz in the Fixed Service (RSP–113).

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–307.7, Issue 5. 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 Spectrum Utilization Policy, General Information Related to Spectrum Utilization and Radio Systems Policies (SP Gen).

2.4 The Geographical Differences Policy (GDP) guideline applies in this frequency band. More information on the GDP can be found in SP 1–20 GHz.Footnote 1

2.5 Although a radio system may conform to the requirements of this SRSP, modifications may be required to that system whenever harmful interferenceFootnote 2 is caused.

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

2.7 The Department may require licensees and/or applicants to use receiver selectivity characteristics that provide rejection of harmful interference.

2.8 The use of a two–frequency plan is required. 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, subject to the provisions of Section 2.4.

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

3. Related Documents

The current issues of the following documents are applicable and available on the Spectrum Management and Telecommunications website at: http://www.ic.gc.ca/spectrum .

SP 3–30 GHz
Revisions to Spectrum Utilization Policies in the 3–30 GHz Frequency Range and Further Consultation
SP 1–20 GHz
Revisions to Microwave Spectrum Utilization Policies in the Range of 1–20 GHz
SP Gen
General Information Related to Spectrum Utilization and Radio Systems Policies
RSP–113
Application Procedures for Planned Radio Stations Above 960 MHz in the Fixed Service
TRC–43
Notes Regarding Designation of Emission (Including Necessary Bandwidth and Classification), Class of Station and Nature of Service

Canadian Table of Frequency Allocations 9 kHz to 275 GHz

CPC–2–0–03
Environmental Process, Radiofrequency Fields and Land–Use Consultation

space to insert signature
CPC - Client Procedures Circular
RSP - Radio Standards Procedure
SP - Spectrum Utilization Policy
TRC -Telecommunications Regulation Circular

4. Radio Frequency Channel Arrangement Description

The radio frequency channel arrangements defined in this Standard provide for six different RF channel bandwidths. Channel pairs are provided with a common transmit/receive separation of 300 MHz. See Table 3 for RF channel frequencies.

4.1 High–capacity (HC) Radio Frequency Channel Arrangements

4.1.1 30 MHz

The centre frequencies of the 8 paired channels which allow RF channel bandwidths of 30 MHz are expressed by the following relationships:

Lower half of the band An = 7710 + 30n for n = 1 to 8
Upper half of the band A'n = 8010 + 30n for n = 1 to 8

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

4.1.2 20 MHz

The centre frequencies of the 12 paired channels which allow RF channel bandwidths of 20 MHz are expressed by the following relationships:

Lower half of the band Bn = 7715 + 20n for n = 1 to 12
Upper half of the band B'n = 8015 + 20n for n = 1 to 12

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

4.2 Medium–capacity (MC) Radio Frequency Channel Arrangements

4.2.1 10 MHz

The centre frequencies of the 25 paired channels which allow RF channel bandwidths of 10 MHz are expressed by the following relationships:

Lower half of the band Cn = 7720 + 10n for n = 1 to 25
Upper half of the band C'n = 8020 + 10n for n = 1 to 25

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

4.3 Low–capacity (LC) Radio Frequency Channel Arrangements

4.3.1 5.0 MHz

The centre frequencies of the 50 paired channels which allow RF channel bandwidths of 5 MHz are expressed by the following relationships:

Lower half of the band Dn = 7722.50 + 5.0 n for n = 1 to 50
Upper half of the band D'n = 8022.50 + 5.0 n for n = 1 to 50

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

4.3.2 2.5 MHz

The centre frequencies of the 100 paired channels which allow RF channel bandwidths of 2.5 MHz are expressed by the following relationships:

Lower half of the band En = 7723.75 + 2.5 n for n = 1 to 100
Upper half of the band E'n = 8023.75 + 2.5 n for n = 1 to 100

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

4.3.3 1.25 MHz

The centre frequencies of the 200 paired channels which allow RF channel bandwidths of 1.25 MHz are expressed by the following relationships:

Lower half of the band Fn = 7725.0 + 1.25 n for n = 1 to 200
Upper half of the band F'n = 8025.0 + 1.25 n for n = 1 to 200

Where n is the channel number and Fn and F'n are the centre frequencies in MHz of the paired channels.

4.4 Branching or Spur Route Channels

The frequencies assigned to a main route system should be re–used where possible on the branching or spur routes. The siting of repeater stations should be planned with this requirement in view, in order that sufficient antenna discrimination is obtained at the branch–off angle.

4.5 Closed Loops

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

4.6 Assignment of Frequencies

New systems using 10 MHz or smaller channel plans should use the lowest available frequency pair that can be successfully coordinated. New systems using the 20 MHz or 30 MHz channel plans should use the highest available frequency pair that can be successfully coordinated.

4.7 Spectral Efficiency

4.7.1 High and medium–capacity digital systems submitted for licensing shall have a minimum spectral efficiency of 4.4 bits/s/Hz of the RF channel bandwidth on a single polarization.

4.7.2 Low–capacity digital systems submitted for licensing shall have a minimum spectral efficiency of 2.4 bits/s/Hz of the RF channel bandwidth on a single polarization.

4.8 Protection Channels

4.8.1 One protection channel will normally be permitted for systems with more than one working channel.

4.8.2 Quad–path diversity applications will be considered on a hop–by–hop basis to solve special propagation problems.

5. Transmitter Characteristics

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

Table 1
Bandwidth
(MHz)
Power Limit
(watts) (dBW)
30 10 10
20 10 10
10 7.5 8.8
5 5 7
2.5 2 3
1.25 1 0

5.2 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 (+13 dBW) per channel.

5.3 The centre frequency of the emission shall be maintained within ±0.002% of the assigned frequency.

5.4 Emission Limits

5.4.1 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 B 50) + 10 log10 B (dB)

Where:
A = attenuation (dB) below the mean output power level
P = percent removed from the carrier frequency
B = authorized bandwidth (MHz)

Note:
1. In no case shall the attenuation be less than 50 dB.
2. Attenuation greater than 80 dB or to an absolute power of less than –13 dBm/MHz is not necessary.

5.4.2 In any 1 MHz 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.

6. Antenna Characteristics

6.1 The co–polarized radiation pattern envelope in the horizontal plane of the antenna must remain within Envelope A defined in Table 2 and shown in Figure 1, for both vertical and horizontal polarizations.

6.2 In uncongested areas, the co–polarized radiation pattern envelope in the horizontal plane of the antenna must remain within Envelope B defined in Table 2 and shown in Figure 1, for both vertical and horizontal polarizations.

Table 2: Antenna Standards
Envelope Minimum Radiation Suppression to Angle in Degrees from Centreline of Main Beam (dB)

to
1.1°
1.1°
to

to
10°
10°
to
15°
15°
to
20°
20°
to
30°
30°
to
100°
100°
to
140°
140°
to
180°
A 0 3 25 29 33 36 42 55 55
B 0 3 21 25 29 32 35 39 45

7. Maximum Equivalent Isotropically Radiated Power

The maximum equivalent isotropically radiated power (e.i.r.p.) from the antenna must not in any case exceed +55 dBW per RF channel.

8. Avoidance of the Geostationary–satellite Orbit

Where practicable, sites for transmitting terrestrial stations in the fixed service, and employing maximum values of e.i.r.p. exceeding +35 dBW in the frequency band 7725–8275 MHz, should be selected so that the direction of maximum radiation of an antenna will be at least 2° away from the geostationary–satellite orbit, taking into account the effect of atmospheric refraction.

Line graph illustrating the antenna radiation pattern limits from Table 2

Table 3: Channel Identification and Carrier Frequencies for High, Medium and Low–capacity Radio Systems in the Lower 8 GHz Band
Channel Frequency GO (RETURN) Channels Channel Frequency RETURN (GO) Channels
30 MHz 20 MHz 10 MHz 5 MHz 2.5 MHz 1.25 MHz 30 MHz 20 MHz 10 MHz 5 MHz 2.5 MHz 1.25 MHz
7725.00             8025.00            
7726.25         E1 F1 8026.25         E1' F1'
7727.50       D1   F2 8027.50       D1'   F2'
7728.75         E2 F3 8028.75         E2' F3'
7730.00     C1     F4 8030.00     C1'     F4'
7731.25         E3 F5 8031.25         E3' F5'
7732.50       D2   F6 8032.50       D2'   F6'
7733.75         E4 F7 8033.75         E4' F7'
7735.00   B1       F8 8035.00   B1'       F8'
7736.25         E5 F9 8036.25         E5' F9'
7737.50       D3   F10 8037.50       D3'   F10'
7738.75         E6 F11 8038.75         E6' F11'
7740.00 A1   C2     F12 8040.00 A1'   C2'     F12'
7741.25         E7 F13 8041.25         E7' F13'
7742.50       D4   F14 8042.50       D4'   F14'
7743.75         E8 F15 8043.75         E8' F15'
7745.00           F16 8045.00           F16'
7746.25         E9 F17 8046.25         E9' F17'
7747.50       D5   F18 8047.50       D5'   F18'
7748.75         E10 F19 8048.75         E10' F19'
7750.00     C3     F20 8050.00     C3'     F20'
7751.25         E11 F21 8051.25         E11' F21'
7752.50       D6   F22 8052.50       D6'   F22'
7753.75         E12 F23 8053.75         E12' F23'
7755.00   B2       F24 8055.00   B2'       F24'
7756.25         E13 F25 8056.25         E13' F25'
7757.50       D7   F26 8057.50       D7'   F26'
7758.75         E14 F27 8058.75         E14' F27'
7760.00     C4     F28 8060.00     C4'     F28'
7761.25< /td>         E15 F29 8061.25         E15' F29'
7762.50       D8   F30 8062.50       D8'   F30'
7763.75         E16 F31 8063.75         E16' F31'
7765.00           F32 8065.00           F32'
7766.25         E17 F33 8066.25         E17' F33'
7767.50       D9   F34 8067.50       D9'   F34'
7768.75         E18 F35 8068.75         E18' F35'
7770.00 A2   C5     F36 8070.00 A2'   C5'     F36'
7771.25         E19 F37 8071.25         E19' F37'
7772.50       D10   F38 8072.50       D10'   F38'
7773.75         E20 F39 8073.75         E20' F39'
7775.00   B3       F40 8075.00   B3'       F40'
7776.25         E21 F41 8076.25         E21' F41'
7777.50       D11   F42 8077.50       D11'   F42'
7778.75         E22 F43 8078.75         E22' F43'
7780.00     C6     F44 8080.00     C6'     F44'
7781.25         E23 F45 8081.25         E23' F45'
7782.50       D12   F46 8082.50       D12'   F46'
7783.75         E24 F47 8083.75         E24' F47'
7785.00           F48 8085.00           F48'
7786.25         E25 F49 8086.25         E25' F49'
7787.50       D13   F50 8087.50       D13'   F50'
7788.75         E26 F51 8088.75         E26' F51'
7790.00     C7     F52 8090.00     C7'     F52'
7791.25         E27 F53 8091.25         E27' F53'
7792.50       D14   F54 8092.50       D14'   F54'
7793.75         E28 F55 8093.75         E28' F55'
7795.00   B4       F56 8095.00   B4'       F56'
7796.25         E29 F57 8096.25         E29' F57'
7797.50       D15   F58 8097.50       D15'   F58'
7798.75         E30 F59 8098.75         E30' F59'
7800.00 A3   C8     F60 8100.00 A3'   C8'     F60'
7801.25         E31 F61 8101.25         E31' F61'
7802.50       D16   F62 8102.50       D16'   F62'
7803.75         E32 F63 8103.75         E32' F63'
7805.00           F64 8105.00           F64'
7806.25         E33 F65 8106.25         E33' F65'
7807.50       D17   F66 8107.50       D17'   F66'
7808.75         E34 F67 8108.75         E34' F67'
7810.00     C9     F68 8110.00     C9'     F68'
7811.25         E35 F69 8111.25         E35' F69'
7812.50       D18   F70 8112.50       D18'   F70'
7813.75         E36 F71 8113.75         E36' F71'
7815.00   B5       F72 8115.00   B5'       F72'
7816.25         E37 F73 8116.25         E37' F73'
7817.50       D19   F74 8117.50       D19'   F74'
7818.75         E38 F75 8118.75         E38' F75'
7820.00     C10     F76 8120.00     C10'     F76'
7821.25         E39 F77 8121.25         E39' F77'
7822.50       D20   F78 8122.50       D20'   F78'
7823.75         E40 F79 8123.75         E40' F79'
7825.00           F80 8125.00           F80'
7826.25         E41 F81 8126.25         E41' F81'
7827.50       D21   F82 8127.50       D21'   F82'
7828.75         E42 F83 8128.75         E42' F83'
7830.00 A4   C11     F84 8130.00 A4'   C11'     F84'
7831.25         E43 F85 8131.25         E43' F85'
7832.50       D22   F86 8132.50       D22'   F86'
7833.75         E44 F87 8133.75         E44' F87'
7835.00   B6       F88 8135.00   B6'       F88'
7836.25         E45 F89 8136.25         E45' F89'
7837.50       D23   F90 8137.50       D23'   F90'
7838.75         E46 F91 8138.75         E46' F91'
7840.00     C12     F92 8140.00     C12'     F92'
7841.25         E47 F93 8141.25         E47' F93'
7842.50       D24   F94 8142.50       D24'   F94'
7843.75         E48 F95 8143.75         E48' F95'
7845.00           F96 8145.00           F96'
7846.25         E49 F97 8146.25         E49' F97'
7847.50       D25   F98 8147.50       D25'   F98'
7848.75         E50 F99 8148.75         E50' F99'
7850.00     C13     F100 8150.00     C13'     F100'
7851.25         E51 F101 8151.25         E51' F101'
7852.50       D26   F102 8152.50       D26'   F102'
7853.75         E52 F103 8153.75         E52' F103'
7855.00   B7       F104 8155.00   B7'       F104'
7856.25         E53 F105 8156.25         E53' F105'
7857.50       D27   F106 8157.50       D27'   F106'
7858.75         E54 F107 8158.75         E54' F107'
7860.00 A5   C14     F108 8160.00 A5'   C14'     F108'
7861.25         E55 F109 8161.25         E55' F109'
7862.50       D28   F110 8162.50       D28'   F110'
7863.75         E56 F111 8163.75         E56' F111'
7865.00           F112 8165.00           F112'
7866.25         E57 F113 8166.25         E57' F113'
7867.50       D29   F114 8167.50       D29'   F114'
7868.75         E58 F115 8168.75         E58' F115'
7870.00     C15     F116 8170.00     C15'     F116'
7871.25         E59 F117 8171.25         E59' F117'
7872.50       D30   F118 8172.50       D30'   F118'
7873.75         E60 F119 8173.75         E60' F119'
7875.00   B8       F120 8175.00   B8'       F120'
7876.25         E61 F121 8176.25         E61' F121'
7877.50       D31   F122 8177.50       D31'   F122'
7878.75         E62 F123 8178.75         E62' F123'
7880.00     C16     F124 8180.00     C16'     F124'
7881.25         E63 F125 8181.25         E63' F125'
7882.50       D32   F126 8182.50       D32'   F126'
7883.75         E64 F127 8183.75         E64' F127'
7885.00           F128 8185.00           F128'
7886.25         E65 F129 8186.25         E65' F129'
7887.50       D33   F130 8187.50       D33'   F130'
7888.75         E66 F131 8188.75         E66' F131'
7890.00 A6   C17     F132 8190.00 A6'   C17'     F132'
7891.25         E67 F133 8191.25         E67' F133'
7892.50       D34   F134 8192.50       D34'   F134'
7893.75         E68 F135 8193.75         E68' F135'
7895.00   B9       F136 8195.00   B9'       F136'
7896.25         E69 F137 8196.25         E69' F137'
7897.50       D35   F138 8197.50       D35'   F138'
7898.75         E70 F139 8198.75         E70' F139'
7900.00     C18     F140 8200.00     C18'     F140'
7901.25         E71 F141 8201.25         E71' F141'
7902.50       D36   F142 8202.50       D36'   F142'
7903.75         E72 F143 8203.75         E72' F143'
7905.00           F144 8205.00           F144'
7906.25         E73 F145 8206.25         E73' F145'
7907.50       D37   F146 8207.50       D37'   F146'
7908.75         E74 F147 8208.75         E74' F147'
7910.00     C19     F148 8210.00     C19'     F148'
7911.25         E75 F149 8211.25         E75' F149'
7912.50       D38   F150 8212.50       D38'   F150'
7913.75         E76 F151 8213.75         E76' F151'
7915.00   B10       F152 8215.00   B10'       F152'
7916.25         E77 F153 8216.25         E77' F153'
7917.50       D39   F154 8217.50       D39'   F154'
7918.75         E78 F155 8218.75         E78' F155'
7920.00 A7   C20     F156 8220.00 A7'   C20'     F156'
7921.25         E79 F157 8221.25         E79' F157'
7922.50       D40   F158 8222.50       D40'   F158'
7923.75         E80 F159 8223.75         E80' F159'
7925.00           F160 8225.00           F160'
7926.25         E81 F161 8226.25         E81' F161'
7927.50       D41   F162 8227.50       D41'   F162'
7928.75         E82 F163 8228.75         E82' F163'
7930.00     C21     F164 8230.00     C21'     F164'
7931.25         E83 F165 8231.25         E83' F165'
7932.50       D42   F166 8232.50       D42'   F166'
7933.75         E84 F167 8233.75         E84' F167'
7935.00   B11       F168 8235.00   B11'       F168'
7936.25         E85 F169 8236.25         E85' F169'
7937.50       D43   F170 8237.50       D43'   F170'
7938.75         E86 F171 8238.75         E86' F171'
7940.00     C22     F172 8240.00     C22'     F172'
7941.25         E87 F173 8241.25         E87' F173'
7942.50       D44   F174 8242.50       D44'   F174'
7943.75         E88 F175 8243.75         E88' F175'
7945.00           F176 8245.00           F176'
7946.25         E89 F177 8246.25         E89' F177'
7947.50       D45   F178 8247.50       D45'   F178'
7948.75         E90 F179 8248.75         E90' F179'
7950.00 A8   C23     F180 8250.00 A8'   C23'     F180'
7951.25         E91 F181 8251.25         E91' F181'
7952.50       D46   F182 8252.50       D46'   F182'
7953.75         E92 F183 8253.75         E92' F183'
7955.00   B12       F184 8255.00   B12'       F184'
7956.25         E93 F185 8256.25         E93' F185'
7957.50       D47   F186 8257.50       D47'   F186'
7958.75         E94 F187 8258.75         E94' F187'
7960.00     C24     F188 8260.00     C24'     F188'
7961.25         E95 F189 8261.25         E95' F189'
7962.50       D48   F190 8262.50       D48'   F190'
7963.75         E96 F191 8263.75         E96' F191'
7965.00           F192 8265.00           F192'
7966.25         E97 F193 8266.25         E97' F193'
7967.50       D49   F194 8267.50       D49'   F194'
7968.75         E98 F195 8268.75         E98' F195'
7970.00     C25     F196 8270.00     C25'     F196'
7971.25         E99 F197 8271.25         E99' F197'
7972.50       D50   F198 8272.50       D50'   F198'
7973.75         E100 F199 8273.75         E100' F199'
7975.00           F200 8275.00           F200'

Footnotes

Footnote 1

Spectrum Utilization Policy 1–20 GHz, Revisions to Microwave Spectrum Utilization Policies in the Range of 1–20 GHz (SP 1–20 GHz), January 1995, contains spectrum utilization principles including the Geographical Differences Policy guideline. This information will be incorporated into a revision of SP Gen.

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Footnote 2

For the purpose of this SRSP, "harmful interference" means interference that endangers the functioning of a radionavigation service or 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.

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