SRSP-511— Technical Requirements for Land Mobile Radio Services Operating in the Bands 768–776 MHz and 798–806 MHz

Issue 2
Published: April 2010
Revised: December 2017

Editor's note

Sections 6.4, 6.5 and annex D have been removed, as the material is related to the DTV transition, which is no longer relevant. A PDF version including this material can be obtained by email.

1. Intent

This Standard radio system plan (SRSP) states the minimum technical requirements for the purpose of efficient spectrum utilization for land mobile and fixed point‑to‑point systems operating in the public safety bands 768-776 MHz and 798-806 MHz.

Radio systems conforming to the requirements contained in this SRSP will take priority in licensing and coordination over non-standard systems proposed for operation in these bands. However, the use of more spectrally efficient technologies is strongly encouraged and different channelization from what is described herein may be considered if it results in increased spectrum efficiency. Such systems would be authorized on a standard basis.


2. General

Equipment used for land mobile systems operating in the bands 768-776 MHz and 798-806 MHz must comply with Radio Standard Specification RSS-119, Land Mobile and Fixed Equipment Operating in the Frequency Range 27.41-960 MHz.

Although a radio system conforms to the requirements of this SRSP, the Department may require modifications to the system whenever harmful interferenceFootnote 1 is caused to other radio sites or systems, except when such interference is due to inadequate receiver selectivity as dealt with under the next paragraph.

The Department reserves the right to limit protection to licensed radio receivers only to the extent of the bandwidth of the transmitters whose emissions they are licensed to receive. Licensees and/or applicants should use receiver selectivity characteristics or filters that reject harmful interference.

Auxiliary base stations (often referred to as control stations) can transmit on either base or mobile transmit frequencies.

In the paired frequency blocks, simplex frequency operation using the base/repeater and mobile transmit frequency (known as repeater talk around) may be permitted within the authorized service area at the discretion of the system operator and will be on a no‑interference, no‑protection basis.Footnote 2 Such operations may be licensed on a case‑by‑case basis beyond the service area of a duplex frequency system as an adjunct to operations. The public safety interoperability channels are exempt from this restriction.

Very low capacity fixed systems may be authorized in these bands on a secondary no‑interference, no‑protection basis in accordance with the appropriate radio systems policies (RPs) and should be in accordance with applicable technical provisions of this SRSP.


3. Related documents

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

Acronyms
Acronyms
CPC Client procedures circular
GL Guidelines
RP Radio systems policy
RSP Radio standards procedure
RSS Radio standards specification
SP Spectrum utilization policy
SRSP Standard radio system plan
TRAA Terrestrial radiocommunication agreements and arrangements

Editor's note

In March 2012, Industry Canada released SMSE-002-12, Policy and Technical Framework — Mobile Broadband Services (MBS) – 700 MHz Band – Broadband Radio Service (BRS) – 2500 MHz Band, in which the upper 700 MHz band plan was adopted.

Editor's note

In October 2013, Industry Canada released the Spectrum advisory bulletin SAB-001-13, Public Safety Operations in the Band 775-776 MHz, which noted that public safety stations deployed in the band 775-776 MHz may experience an increased level of interference from commercial mobile broadband operations. Although licensed public safety mobile systems will be protected from each other, public safety stations deployed in the band 775-776 MHz will not be protected from mobile broadband systems operating in conformance with the transmitter unwanted emission limits defined in RSS-130, Mobile Broadband Services (MBS) Equipment Operating in the Frequency Bands 698-756 MHz and 777-787 MHz in the band 777-787 MHz.


4. General guidelines

4.1 Channel assignments for the bands 768-776 MHz and 798-806 MHz

Frequency assignments shall be in accordance with tables A1, A2, A3 and A4 of annex A.

The bands 768-775 MHz and 798-805 MHz are to be used on the basis of a two‑frequency (duplex) channelling plan. For land mobile service operations, the base station transmitters will normally operate in the 768-775 MHz band and the mobile station transmitters will normally operate in the 798-805 MHz band. A mobile station may also transmit on its associated base station frequency when operating in a simplex mode. Base station‑to‑base station transmissions may occur in either frequency band 768-775 MHz or 798-805 MHz (see blocks A and B in figure 1).Footnote 3

The bands 775-776 MHz and 805-806 MHz are to be used on the basis of a single (simplex) channelling plan (see blocks C and D in figure 1).

Blocks A and D will be assigned first. Blocks B and CFootnote 4 will be assigned, on an exceptional basis, at the discretion of the regional office.

Figure 1 — Frequency blocks

Figure 1 - Frequency Blocks
Description of figure 1

This figure shows the band plan for assignment of frequencies to land mobile services in the frequency bands 768 to 776 MHz and 798–806 MHz.

The bands 769–775 MHz, paired with 799 to 805 MHz (Block A), and 768 to 769 MHz, paired with 798 to 799 MHz (Block B), are to be used for duplex operations. For duplex operations, the base station transmitting frequencies are in the band 768 to 775 MHz while the corresponding mobile station transmitting frequencies are in the band 798 to 805 MHz, respectively.

The bands 775 to 776 MHz (Block C) and 805 to 806 MHz (Block D) are reserved for simplex operations.

The bands 768-776 MHz and 798-806 MHz will be channelized into 6.25 kHz wide channels. Up to eight of these narrowband channels can be combined to create 12.5 kHz, 25 kHz or 50 kHz wide channels, but they must meet a minimum spectrum efficiency standard data rate of 4.8 kbps per 6.25 kHz bandwidth or at least one voice channel per 12.5 kHz of bandwidth. The frequencies corresponding to the channel number are defined by the formulas in tables 1, 2, 3 and 4 below, where n is the channel number and series A, B, C and D are designated for the channels of bandwidth 6.25 kHz, 12.5 kHz, 25 kHz and 50 kHz respectively.

Table 1—Channel series for 768-769 MHz and 798-799 MHz (Block B in figure 1)
Lower edge (MHz) Centre frequency (MHz) Upper edge (MHz)
Base BAn = 768.0 + (0.00625)*(n-1)
where n = 1 to 160
BBn = 768.0 + (0.0125)*(n-1)
where n = 1 to 80
BCn = 768.0 + (0.025)*(n-1)
where n = 1 to 40
BDn = 768.0 + (0.05)*(n-1)
where n = 1 to 20
BAn = 768.003125 + (0.00625)*(n-1)
where n = 1 to 160
BBn = 768.00625 + (0.0125)*(n-1)
where n = 1 to 80
BCn = 768.0125 + (0.025)*(n-1)
where n = 1 to 40
BDn = 768.025 + (0.05)*(n-1)
where n = 1 to 20
BAn = 768.0 + (0.00625)*(n)
where n = 1 to 160
BBn = 768.0 + (0.0125)*(n)
where n = 1 to 80
BCn = 768.0 + (0.025)*(n)
where n = 1 to 40
BDn = 768.0 + (0.05)*(n)
where n = 1 to 20
Mobile BAn = 798.0 + (0.00625)*(n-161)
where n = 161 to 320
BBn = 798.0 + (0.0125)*(n-81)
where n = 81 to 160
BCn = 798.0 + (0.025)*(n-41)
where n = 41 to 80
BDn = 798.0 + (0.05)*(n-21)
where n = 21 to 40
BAn = 798.003125 + (0.00625)*(n-161)
where n = 161 to 320
BBn = 798.00625 + (0.0125)*(n-81)
where n = 81 to 160
BCn = 798.0125 + (0.025)*(n-41)
where n = 41 to 80
BDn = 798.025 + (0.05)*(n-21)
where n = 21 to 40
BAn = 798.0 + (0.00625)*(n-160)
where n = 161 to 320
BBn = 798.0 + (0.0125)*(n-80)
where n = 81 to 160
BCn = 798.0 + (0.025)*(n-40)
where n = 41 to 80
BDn = 798.0 + (0.05)*(n-20)
where n = 21 to 40
Table 2—Channel series for 769-775 MHz and 799-805 MHz (Block A in figure 1)
Lower edge (MHz) Centre frequency (MHz) Upper edge (MHz)
Base AAn = 769.0 + (0.00625)*(n-1)
where n = 1 to 960
ABn = 769.0 + (0.0125)*(n-1)
where n = 1 to 480
ACn = 769.0 + (0.025)*(n-1)
where n = 1 to 240
ADn = 769.0 + (0.05)*(n-1)
where n = 1 to 120
AAn = 769.003125 + (0.00625)*(n-1)
where n = 1 to 960
ABn = 769.00625 + (0.0125)*(n-1)
where n = 1 to 480
ACn = 769.0125 + (0.025)*(n-1)
where n = 1 to 240
ADn = 769.025 + (0.05)*(n-1)
where n = 1 to 120
AAn = 769.0 + (0.00625)*(n)
where n = 1 to 960
ABn = 769.0 + (0.0125)*(n)
where n = 1 to 480
ACn = 769.0 + (0.025)*(n)
where n = 1 to 240
ADn = 769.0 + (0.05)*(n)
where n = 1 to 120
Mobile AAn = 799.0 + (0.00625)*(n-961)
where n = 961 to 1920
ABn = 799.0 + (0.0125)*(n-481)
where n = 481 to 960
ACn = 799.0 + (0.025)*(n-241)
where n = 241 to 480
ADn = 799.0 + (0.05)*(n-121)
where n = 121 to 240
AAn = 799.003125 +(0.00625)*(n-961)
where n = 961 to 1920
ABn = 799.00625 + (0.0125)*(n-481)
where n = 481 to 960
ACn = 799.0125 + (0.025)*(n-241)
where n = 241 to 480
ADn = 799.025 + (0.05)*(n-121)
where n = 121 to 240
AAn = 799.0 + (0.00625)*(n-960)
where n = 961 to 1920
ABn = 799.0 + (0.0125)*(n-480)
where n = 481 to 960
ACn = 799.0 + (0.025)*(n-240)
where n = 241 to 480
ADn = 799.0 + (0.05)*(n-120)
where n = 121 to 240
Table 3—Channel series for 775-776 MHz (Block C in figure 1)
Lower edge (MHz) Centre frequency (MHz) Upper edge (MHz)
Base and mobile CAn = 775.0 + (0.00625)*(n-1)
where n = 1 to 160
CBn = 775.0 + (0.0125)*(n-1)
where n = 1 to 80
CCn = 775.0 + (0.025)*(n-1)
where n = 1 to 40
CDn = 775.0 + (0.05)*(n-1)
where n = 1 to 20
CAn = 775.003125 + (0.00625)*(n-1)
where n = 1 to 160
CBn = 775.00625 + (0.0125)*(n-1)
where n = 1 to 80
CCn = 775.0125 + (0.025)*(n-1)
where n = 1 to 40
CDn = 775.025 + (0.05)*(n-1)
where n = 1 to 20
CAn = 775.0 + (0.00625)*(n)
where n = 1 to 160
CBn = 775.0 + (0.0125)*(n)
where n = 1 to 80
CCn = 775.0 + (0.025)*(n)
where n = 1 to 40
CDn = 775.0 + (0.05)*(n)
where n = 1 to 20
Table 4—Channel series for 805-806 MHz (Block D in figure 1)
Lower Edge (MHz) Centre Frequency (MHz) Upper Edge (MHz)
Base and mobile DAn = 805.0 + (0.00625)*(n-1)
where n = 1 to 160
DBn = 805.0 + (0.0125)*(n-1)
where n = 1 to 80
DCn = 805.0 + (0.025)*(n-1)
where n = 1 to 40
DDn = 805.0 + (0.05)*(n-1)
where n = 1 to 20
DAn = 805.003125 + (0.00625)*(n-1)
where n = 1 to 160
DBn = 805.00625 + (0.0125)*(n-1)
where n = 1 to 80
DCn = 805.0125 + (0.025)*(n-1)
where n = 1 to 40
DDn = 805.025 + (0.05)*(n-1)
where n = 1 to 20
CAn = 805.0 + (0.00625)*(n)
where n = 1 to 160
CBn = 805.0 + (0.0125)*(n)
where n = 1 to 80
CCn = 805.0 + (0.025)*(n)
where n = 1 to 40
CDn = 805.0 + (0.05)*(n)
where n = 1 to 20

The channel spacing between associated mobile and base station centre frequencies is 30 MHz.

Normally, to improve spectrum efficiency, frequency reuse is required in systems or networks where many frequencies may be licensed to one licensee. Preference will be given to more spectrally efficient systems.

Frequencies designated for duplex operation may be assigned for simplex operation where conditions warrant.

Assignment of channels for different bandwidths will begin at the channels shown in table 5. For example, in the frequency band 768-769 MHz, the assignment of 12.5 kHz licences will begin at channel 1 and subsequent assignments will be made upwards (channels 2, 3, etc.); the assignment of 50 kHz licences will begin at channel 20 and subsequent assignments will be made downwards (channels 19, 18, etc.). Figure 2 provides an illustration of this process.

Table 5—Assignment of channels based on channel bandwidth
Channel numberFootnote * and direction
Base band (MHz) 768-769 MHz 769-775 MHz 775-776 MHz 805-806 MHz
6.25 kHz 1 up 13 up 160 down 160 down
12.5 kHz 1 up 7 up 80 down 80 down
25 kHz 40 down 237 down 1 up 1 up
50 kHz 20 down 117 down 1 up 1 up

Return to footnote * referrer  Channel numbers correspond to the A, B, C and D‑series channel numbers in tables A1, A2, A3 and A4.

Figure 2 — Assignment of channels based on channel bandwidth

Figure 2 - Assignment of channels based on channel bandwidth
Description of figure 2

This chart shows how assignment of channels for different bandwidths will be determined. For Block A, from 769 to 775 MHz, and Block B, from 768 to 769 MHz, assignments of 6.25 kHz and 12.5 kHz channels will begin at the lower band edges, i.e. at 769 MHz for Block A and at 768 MHz for Block B. Conversely, assignments of 25 kHz and 50 kHz channels will begin at the upper band edges, i.e. at 775 MHz for Block A and at 769 MHz for Block B. For Block C, from 775 to 776 MHz, and Block D from 805 to 806 MHz, assignments of 25 kHz and 50 kHz channels will begin at the lower band edges, i.e. at 775 MHz for Block C and at 805 MHz for Block D. Conversely, assignments of 6.25 kHz and 12.5 kHz channels will begin at the upper band edges, i.e. at 776 MHz for Block C and at 806 MHz for Block D.

Channels of 25 kHz or 50 kHz will not be assigned where they would overlap with the interoperability channels shown in table 6 or the low power channels shown in section 5.1.

Normally, 25 kHz or 50 kHz channels will not be assigned where they would overlap the trunking groups shown in table A7 of annex A.

4.2 Conventional mobile radio systems

Assignments for conventional systemsFootnote 5 can be made from the available spectrum in a given area. In general, assignments will be made commencing at the upper end of the band and working downwards.

4.3 Trunked radio systems

Any system using more than three channels at one site shall be configured as a trunked system. The interoperability channels listed in section 5.1 will not be counted as channels with respect to trunked systems.

As outlined in table A7 of annex A, the Department has listed, as a guideline, trunking groups for system deployments in this band, including two groups of interoperability channels. Within the Canada‑United States border area, the number of trunking groups varies depending on the number of channels available (see annex B). Trunking groups are identified by the first channel number.  The centre frequencies for each channel within the group are separated by 250 kHz which is equivalent to 40 channels of 6.25 kHz. Expansion of trunked systems to more channels per group is to be from other trunked system groups.

Interoperability channels used for trunking systems are on a secondary, no‑interference, no‑protection basis to conventional interoperability operations. If interoperability channels are used in a trunking system, they must immediately be released when they are needed for conventional interoperability purposes.

The calling and mobile data channels (see table 6) should not normally be included in a trunking system.

All channel usage in the Canada‑United States border areaFootnote 6 will be assigned based on the technical and operational requirements outlined in annex B and at the discretion of the regional director, depending on local requirements.

4.4 Public Safety — Hierarchy of safety service users

For the identification of public safety service providers, the Department recognizes the hierarchy of safety service providers as stated in section 4.1 of SRSP-502, Technical Requirements for Land Mobile and Fixed Radio Services Operating in the Bands 806-821/851-866 MHz and 821-824/866-869 MHz.


5. Spectrum availability and sub‑allocation plan

5.1 Interoperability channels in the bands 769-775 MHz and 799-805 MHz

The following channels are available as public safety interoperability channels. These channels are available for use in all areas and are to be used only for coordination of tactical communications between different public safety agencies or for other similar emergency communications. Usage of these channels in the coordination zone may be locally coordinated in accordance with the interoperability requirements of Canadian and U.S. licensees.

Table 6—Interoperability channelsFootnote *
(base/mobile) To (base/mobile) Designation
23 / 983 to 24 / 984 I/O (Interoperability)
39 / 999 to 40 / 1000 I/O CallingFootnote **
63 / 1023 to 64 / 1024 I/O
79 / 1039 to 80 / 1040 I/O
103 / 1063 to 104 / 1064 I/O
119 / 1079 to 120 / 1080 I/O
143 / 1103 to 144 / 1104 I/O
159 / 1119 to 160 / 1120 I/O
183 / 1143 to 184 / 1144 I/O
199 / 1159 to 200 / 1160 I/O
223 / 1183 to 224 / 1184 I/O
239 / 1199 to 240 / 1200 I/O
263 / 1223 to 264 / 1224 I/O
279 / 1239 to 280 / 1240 I/O mobile dataFootnote ***
303 / 1263 to 304 / 1264 I/O
319 / 1279 to 320 / 1280 I/O
641 / 1601 to 642 / 1602 I/O
657 / 1617 to 658 / 1618 I/O
681 / 1641 to 682 / 1642 I/O Calling
697 / 1657 to 698 / 1658 I/O
721 / 1681 to 722 / 1682 I/O
737 / 1697 to 738 / 1698 I/O
761 / 1721 to 762 / 1722 I/O
777 / 1737 to 778 / 1738 I/O
801 / 1761 to 802 / 1762 I/O
817 / 1777 to 818 / 1778 I/O
841 / 1801 to 842 / 1802 I/O
857 / 1817 to 858 / 1818 I/O
881 / 1841 to 882 / 1842 I/O
897 / 1857 to 898 / 1858 I/O
921 / 1881 to 922 / 1882 I/O mobile data
937 / 1897 to 938 / 1898 I/O

Return to footnote * referrer Channel numbers correspond to the AA‑series 6.25 kHz channels in tables A3 and A4.

Return to footnote ** referrer Calling channels are used to establish contact between public safety entities in order for the parties to move to an interoperability channel. These channels are not used as traffic channels.

Return to footnote *** referrer Mobile data channels are generally for transmission of data.

RSS-119 specifies that transmitters operating on the interoperability channels in the bands 769-775 MHz and 799-805 MHz shall conform to the following technical standards:

Transmitters designed for voice operation on the interoperability channels shall include a 12.5 kHz bandwidth mode of operation that conforms to the following standards, which are incorporated by reference:

  • Project 25—FDMA Common Air Interface – New Technology Standards Project – Digital Radio Technical Standards, Telecommunications Industry Association, TIA/EIA-102.BAAA and
  • Project 25—Vocoder description, Telecommunications Industry Association, TIA/EIA-102.BABA

Transmitters designed for data transmission on narrowband interoperability channels shall include a 12.5 kHz bandwidth mode of operation that conforms to the following standards, which are incorporated by reference:

  • Project 25 Data Overview – New Technology Standards Project – Digital Radio Technical Standards, Telecommunications Industry Association, TIA/EIA-102.BAEA
  • Project 25 Packet Data Specification – New Technology Standards Project – Digital Radio Technical Standards, Telecommunications Industry Association, TIA/EIA-102.BAEB
  • Project 25 Radio Control Protocol (RCP) – New Technology Standards Project – Digital Radio Technical Standards, Telecommunications Industry Association, TIA/EIA-102.BAEE and
  • Project 25 FDMA Common Air Interface – New Technology Standards Project – Digital Radio Technical Standards, Telecommunications Industry Association, TIA/EIA-102.BAAA

Mobile and portable transmitters operating on narrowband channels in the bands 769-775 MHz and 799-805 MHz must be capable of operating on all of the designated nationwide narrowband interoperability channels pursuant to the technical standards as specified above.Footnote 7

Mobile and portable transmitters that are designed to operate only in the data mode, with the exception of the 25 kHz and 50 kHz bandwidth systems, must be capable of operation on the data interoperability channels specified in table 6, but need not be capable of voice operation on other interoperability channels.

Mobile and portable transmitters that are designed to operate only in the voice mode do not have to operate on the data interoperability channels specified in table 6.

5.2 Low-power channels in the bands 769-775 MHz and 799-805 MHz

ChannelsFootnote 8 1 to 12, 949 to 972 and 1909 to 1920 are available for narrowband low power use. These channels will be available for mobile operations only. No fixed station will be allowed on these channels. These channels are available on an unprotected basis. Operation on these low power channels is limited to a maximum effective radiated power (ERP) of 2 watts.

5.3 National radio systems in the bands 769-775 MHz and 799-805 MHz

As shown in table 7 below, 68 paired narrowband channels are sub‑allocated for national land mobile radio systems.

A national land mobile frequency assignment will be considered if the operational function satisfies the following requirements:

  1. operational necessity for the mobile and/or portable radio equipment to travel and be used on a regular basis, normally within all regions of the country, AND operational necessity for the mobile and/or portable radio equipment to operate on the same frequency(ies) at all operating locations OR
  2. to provide response to unpredictable emergencies of national geographic scope and concern. National systems can be conventional or trunked type.

As a guide, the national channels are set out in trunking groups as shown in table 7. Variations and combinations of these trunking groups can be assigned at the discretion of the regional office.

Table 7—National channels/trunking groupsFootnote *
GroupFootnote ** National trunking channels
309 309 349 389 429 469 509 549 589 629
310 310 350 390 430 470 510 550 590 630
315 315 355 395 435 475 515 555 595 635
316 316 356 396 436 476 516 556 596 636
363 363 403 443 483 523 563 603 643
364 364 404 444 484 524 564 604 644
371 371 411 451 491 531 571 611 651
372 372 412 452 492 532 572 612 652

Return to footnote * referrer Channel numbers correspond to the AA‑series 6.25 kHz channels in tables A3 and A4 and paired mobile station channels are 30 MHz higher.

Return to footnote ** referrer The group number is given by the first channel of the group.

Assignment of the national channels will begin with trunking groups 309, 310, 363 and 364.

Trunking groups 315, 316, 371 and 372 will be available for national assignments until August 31, 2016. If they have not been assigned by this date, they will be available for local use at the discretion of the regional office.

In areas where there is spectrum congestion, national channels may be assigned for local use at the discretion of the Regional Office. These assignments will begin with trunking groups 315, 316, 371 and 372.

5.4 Conventional channels in the bands 769-775 MHz and 799-805 MHz

As outlined below, 148 paired 6.25 kHz channels are sub‑allocated as conventional channels.

Table 8—Conventional channelsFootnote *
Base/mobile To Base/mobile Base/mobile To Base/mobile
31/991 to 38/998 517/1477 to 520/1480
71/1031 to 78/1038 557/1517 to 560/1520
111/1071 to 118/1078 597/1557 to 600/1560
151/1111 to 158/1118 637/1597 to 640/1600
195/1151 to 198/1158 671/1631 to 680/1640
235/1191 to 238/1198 711/1671 to 720/1680
275/1231 to 278/1238 751/1711 to 760/1720
317/1277 to 318/1278 791/1751 to 800/1760
357/1317 to 360/1320 831/1791 to 840/1800
397/1357 to 400/1360 871/1831 to 880/1840
437/1397 to 440/1400 911/1871 to 920/1880
477/1437 to 480/1440

Return to footnote * referrer Channel numbers correspond to the AA-series 6.25 kHz channels in tables A3 and A4.

In areas where there is spectrum congestion, conventional channels may be combined to create trunking groups at the discretion of the regional office.

5.5 Trunking channels in the bands 769-775 MHz and 799-805 MHz

The remaining 656 paired 6.25 kHz channels that are not sub-allocated in sections 5.1-5.4 will be sub‑allocated as trunked channels (see table A7).

Variations and combinations of the trunking groups in table A7 can be assigned at the discretion of the regional office.


6. Technical criteria

6.1 Channel sharing

The assignment of a frequency or frequencies to a holder of a radio authorization does not confer a monopoly on the use of the frequency or frequencies, nor shall a radio authorization be construed as conferring any right of continued tenure in respect of the frequency or frequencies (see Section 40 of the Radiocommunication Regulations).

6.2 Loading guidelines

The Department will apply the guidelines found in GL-04, Channel Loading Guidelines, in determining the loading of communications channels, and thus, of radio channels.

In the frequency assignment process, these guidelines may be used in conjunction with current observed channel occupancy data (obtained with automatic occupancy measuring equipment) to determine whether additional channels are required. Such observations will also be used to assess the general loading criteria and the inherent trade‑off between sound spectrum management and acceptable grades of service.

The Department is using this approach to make frequency assignments, but may also take into account other considerations when assessing the number of radio channels to be assigned to a system. Applicants should provide as much traffic‑related data as possible with their application.

6.3 Technical requirements

6.3.1 Limits and co-channel assignments

The ERP shall be limited to that necessary (typically a 125 W maximum) to provide the required service as determined by the system requirements, and will be subject to the limitations in tables B4 and B5 of annex B.

Normally, in urban areas and areas of intensive mobile use, the minimum geographic separation between co‑channel base stations of different networks will be calculated based on a non-overlap of the 40 dBμV/m protected contour of the existing station and the 22 dBμV/m interference contour of the proposed station. This criterion is not applicable to systems operating on the same channel at different times (vertical loading).

The protected contour of the existing station is calculated based on a probability of service of 50% of the time for 50% of the locations at the edge of the contour.

The interference contour is calculated using the probability that the interfering signal level used is not exceeded more than 10% of the time for 50% of the locations at the edge of the contour (i.e. 90% of the time it is below the threshold for 50% of the locations).

Editor's note

Sections 6.4 and 6.5 have been removed, as the material is related to the DTV transition, which is no longer relevant. A PDF version with these sections can be obtained by email.

Issued under the authority of the
Minister of Industry

Marc Dupuis
Director General
Engineering, Planning and Standards Branch

Date modified: