BPR-1 — General Rules (sf10906)

Annex C: Demonstration of compliance with radio exposure for low-power and very low-power undertakings

To demonstrate compliance with Safety Code 6, low-power and very low-power broadcasting stations must provide the following information:

  • General information on the site, such as its location and type of antenna structure.
  • A summary of the parameters of the station being considered, all broadcasting stations within 1 km and any other transmitting stations within 100 m (frequency, maximum ERP).
  • An explanation of all access controls that prevent the general public from accessing the area. A picture, sketch or diagram of the site/tower showing fencing or locked doors would be beneficial as part of the explanation. If the installation involves a free-standing tower with no fencing, indicate the anti-climbing measures installed on the tower.
  • A demonstration of compliance using either the distances in the tables below or detailed calculations using the formula described in section 8.1
  • A sentence attesting that the site is compliant with the Safety Code 6 limits.

Tables C1, C2 and C3 are based on the following assumptions:

  • The overall contribution from other radio apparatus in the vicinity is considered non-significant.
  • “Distance from antenna” is the distance from the centre of radiation of the antenna to any point 2 m above from the ground or any points accessible to the public.
Table C1: Compliance distance for the AM Broadcasting Service
AM Broadcasting Service Distance from antenna (m) Transmitter power limits (W)
Low power (electrical height below 60 degrees) 14.5 Less than 100
Low-power (electrical height 60 degrees or above) 4 Less than 100
Table C2: Compliance distance for the FM Broadcasting Service
FM Broadcasting Service Distance from antenna (m) ERP limits (W)
Low-power single polarization 5.1 50
Very low-power single polarization 2.3 10
Low-power dual polarization 7.2 50
Very Low-power dual polarization 3.2 10
Table C3: Compliance distance for the Television Broadcasting Service
Television Broadcasting Service Distance from antenna (m) ERP limits (W)
Low-power - Channel 2 to 6 (analog) 7.2 100
Low-power - Channel 7-13 (analog) 14.4 400
Low-power - Channel 14-51 (analog) 43.6 5000
Very low-power - Channel 2 to 6 (analog) 4.1 32
Very low-power - Channel 7-13 (analog) 4.1 32
Very low-power - Channel 14-51 (analog) 7.8 160
Low-power - Channel 2 to 6 (digital) 13.8 370
Low-power - Channel 7 to 13 (digital) 17.6 600
Low-power - Channel 14 to 51 (digital) 31.5 2600

Note: The distances above can also be used if more than one low-power station is on the same tower and all of the following criteria are met:

  • There is more than one station/frequency being used at the site, and they are all of the same type of broadcasting service (e.g. all FM).
  • The total power of those individual stations added together does not exceed the maximum power level allowed for one station of the same type.

Annex D: Letter of intent

This is to inform you that [company name] has applied to Innovation, Science and Economic Development Canada (ISED) and the Canadian Radio‑television and Telecommunications Commission (CRTC) for the authority to [operate a new or to modify an existing] [AM / FM / TV / DTV / /S‑DARS] station to serve [community name]. The transmitting facility, which will be located in your community, includes a [new antenna‑supporting structure at space to insert address / modification to the existing antenna‑supporting structure located at space to insert address].

This is also to inform you that requirements set out in CPC‑2‑0‑03 for the [new/modification of the] transmitting facility will be fully complied with before any construction begins. However, our project is part of the CRTC public hearing process and is dependent upon CRTC approval. Therefore, we prefer to fully implement the full consultation process only if we receive a favourable ruling from the CRTC in regards to our application. Please be advised that ISED will not issue the authority for construction until we have completed any and all consultation processes required under CPC‑2‑0‑03.

If you have further questions or comments, please contact [name], at [contact information]. [The CRTC public hearing for this application is scheduled for space to insert date].

Yours sincerely,

space to insert full name
Designated Corporate Officer or Individual Applicant

Annex E: Antenna pattern file format

The “.pat” antenna files are ASCII files that can be created or edited with any text editor or word processor. The files store a combination of angular positions and pattern attenuation values. Antenna attenuation can be given either as dB values or as relative fields. Both azimuth and elevation pattern values can be stored. In order to do a proper normalization of the antenna patterns for calculation, the angles of maximum radiation must be included. Interpolation is performed for azimuth or elevation angles that are in between angular positions given in the file.

The file format is as follows:

 'Antenna Name', GAIN, PATVAL
AZA(1), AZPAT(1)
AZA(2), AZPAT(2)
ELA(1,1), ELPAT(1,1)
ELA(1,2), ELPAT(1,2)
ELA(2,1), ELPAT(2,1)
ELA(2,2), ELPAT(2,2)

'Antenna Name': The name of the antenna, limited to a maximum of 20 characters and enclosed in single quotation marks. The name is used to uniquely identify the antenna.

GAIN: The maximum gain of the antenna in dBi. Optional value which is not used in calculations.

PATVAL: This number indicates whether the tabulated pattern data is given as relative values or in dB. PATVAL = 1 for relative field; PATVAL = 2 for dB (with negative sign).

AZA (1..N): Azimuth angles for azimuth pattern values. These need to be in ascending order in the file. Maximum azimuth increment is 45°.

AZPAT (1..N): Azimuth pattern value in relative field as a decimal fraction, or in dB, depending on the value of PATVAL.

N: Total number of azimuths listed in the file, limited to a maximum of 721 points.

999: A special code which separates the azimuth plane from the elevation plane antenna data.

NUM_ELPAT: Number of elevation pattern descriptions, limited to a maximum of 72 “sections”.

NELVAL: Number of elevation pattern values that are specified for each elevation section, limited to a maximum number of 181 points per section. Each elevation section must use the same set of angles.

ELPAT_AZ: The azimuth in degrees for which the following elevation pattern is given. The value must be between 0 and 360 degrees, inclusive.

ELA: Elevation angle of which the elevation pattern is specified. The angles must begin above the horizon (positive sign) and progress to below the horizon (negative sign).

ELPAT: Elevation pattern value in relative field as a decimal fraction, or in dB, depending on the value of PATVAL.

A sample “.pat” file is listed below. The pattern values are listed in dB (PATVAL = 2), there are 26 azimuth values given and 2 elevation sections, each having 19 elevation values. The first elevation section is for 0 degree azimuth, the second cut for 180 degree azimuth.

'Demo',31.0,2 4,-24.00007822
0,0 3,-36.00326279
1,-4.000001861 2,-16.99991797
2,-16.99991797 1,-4.000001861
3,-36.00326279 0,0
4,-24.00007822 -1,-4.000001861
5,-31.00179498 -2,-16.99991797
6,-38.99629455 -3,-36.00326279
7,-53.97940009 -4,-24.00007822
8,-46.98970004 -5,-31.00179498
9,-47.44727495 -6,-38.99629455
45,-50.0 -7,-53.97940009
90,-50.0 -8,-46.98970004
135,-50.0 -89,-47.44727495
180,-50.0 180
225,-50.0 89,-47.44727495
270,-50.0 8,-46.98970004
315,-50.0 7,-53.97940009
351,-47.44727495 6,-38.99629455
352,-46.98970004 5,-31.00179498
353,-53.97940009 4,-24.00007822
354,-38.99629455 3,-36.00326279
355,-31.00179498 2,-16.99991797
356,-24.00007822 1,-4.000001861
357,-36.00326279 0,0
358,-16.99991797 -1,-4.000001861
359,-4.000001861 -2,-16.99991797
999 -3,-36.00326279
2, 19 -4,-24.00007822
0 -5,-31.00179498
89,-47.44727495 -6,-38.99629455
8,-46.98970004 -7,-53.97940009
7,-53.97940009 -8,-46.98970004
6,-38.99629455 -89,-47.44727495