BPR-4 — Application Procedures and Rules for Television Broadcasting Undertakings

Appendix 5 - Distance Versus Depression Angle (For various antenna heights)

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Appendix 6 - Procedure to Determine Interference Zone

On an appropriately scaled map plot the transmitter sites and do the following:

1. Plot the protected service contour for the assignment or allotment to be protected, based on the maximum or other permissible parameters, as shown in Section C-1.2.
2. Plot the interfering contour for the proposed assignment or allotment based on its proposed parameters in accordance with the interfering signal levels as shown in Section C-1.4.
3. Mark the two points where the contours intersect.
4. Repeat steps 1, 2 and 3 except increase the value of each contour while maintaining the same protection ratio until the protected and interfering contours are tangential.
5. Draw a line joining the intersection points obtained above. The area contained within this line and the protected service contour drawn in step 1 defines the interference zone.

Example

The following example shows the interference zone between an existing UHF Class B station and a proposed Class A station which are short-spaced and on co-channels.

1. The protected service contour from Section C-1.2 is 64 dBu which extends to 45 km.
2. The interfering contour from Section C-1.4 is 46 dBu (the extent of this contour will vary depending on the proposed operating facilities).
3. Mark the two points where the contours intersect.
4. Plot the 66 dBu service contour and the 48 dBu interfering contour and mark the two points of intersection. Continue to increase the value of the contours, plot them, and mark the intersection points until the contours are tangent.
5. Draw a line joining the intersection points obtained above. The area contained within this line and the protected service contour drawn in step 1 defines the interference zone. This area is shown cross-hatched in the drawing.

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Appendix 7 - Ghost Delay Versus Ghost Level for a Given Picture Grade

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Appendix 8 - Table 1: UHF Protection Criteria for Assignments with Operating Parameters

Greater than 1000 kW ERP and/or 300 Metres EHAAT

Channel Separations	Protection Criteria
± 1	The maximum permissible F(50,10) signal at the protected Grade B contour is equal to 100 dBu
± 2, ± 3	No overlap of 100 dBu contours calculated with F(50,50) curves
± 4	Protected site outside of proposed 74 dBu F(50,50) contours
± 7	No overlap of 74 dBu contours calculated with F(50,50) curves
± 14	The maximum permissible F(50,10) signal at the protected Grade B contour is equal to 110 dBu
± 15	The maximum permissible F(50,10) signal at the protected Grade B contour is equal to 92 dBu

For international protection criteria, refer to the International Agreement.

Appendix 8 - Table 2: Adjacent Channel VHF Separations

For VHF allotments or assignments, where the separation is less than 96 km, the maximum permissible interfering signal at the adjacent channel's protected Grade B signal contour of a domestic assignment shall not exceed that shown in the table below using F(50,50) propagation curves:

Channels 2-6

Separation between TX Sites (km)	Interfering Signal (dBu)	D/U Protection Ratio (dB)
Between 95 and less than 96	96	-49
Between 93 and less than 95	84	-37
Between 92 and less than 93	77	-30
Less than 92	72	-25

Channels 7-13

Separation between TX Sites (km)	Interfering Signal (dBu)	D/U Protection Ratio (dB)
Between 95 and less than 96	93	-37
Between 93 and less than 95	89	-33
Between 90 and less than 93	87	-31
Between 87 and less than 90	84	-28
Between 84 and less than 87	82	-26
Less than 84	81	-25

Appendix 8 - Table 3a: Standard Separation Distances in Kilometres Required Between Canadian Classes of UHF Television Allotments and Assignments

Class of Allotment/ Assignment		Channel separation r, number of channels above (+) or below (-) the reference channel n
		0 Co-channel		± 1 Adjacent D/U = -16 dB at D = 74 dBu F(50,50) or D/U = -36 dB at D = 64 dBu F(50,50)	± 2, ± 3 IM No overlap of D = 100 dBu F(50, 50) U = 100 dBu F(50,50)	+ 4 Adjacent Locate Outside D = 74 dBu F(50,50)	- 4 Adjacent Locate Outside D = 74 dBu F(50,50)
Channel Accorded Protection n Desired (D)	Potential Interfering Channel n + r Undesired (U)	Non-offset	Offset
		D/U = 35 dB D = 64 dBu F(50,50) U = 29 dBu F(50,10)	D/U = 18 dB D = 64 dBu F(50,50) U = 46 dBu F(50,10)
C C C B B B A A A	C B A C B A C B A	353 328* 308* 328 248 228* 308 228* 163	250 225* 205* 225 153 133* 205 133 85	88 77 73 77* 52 48 73* 48 28	36 25 21 25 14 10 21 10 6	53 53 53 30 30 30 15 15 15	53 30 15 53 30 15 53 30 15

* Protection Provided at Potential Interfering Channel 64 or 74 dBu Contour.

Appendix 8 - Table 3b: Standard Separation Distances in Kilometres Required Between Canadian Classes of UHF Television Allotments and Assignments

Class of Allotment Assignment		Channel separation r, number of channels above (± ) or below (-) the reference channel n
		± 7 Oscillator No overlap of D = 74 dBu F(50,50) U = 74 dBu F(50,50)	± 14 Sound image D/U = -46 dB at D = 64 dBu F(50,50) U = 110 dBu F(50,50)	± 15 Picture image D/U = -28 dB at D = 64 dBu F(50,50) U = 92 dBu F(50,50)	- 14 Sound image* D/U = -46 dB at D = 64 dBu F(50,50) U = 110 dBu F(50,50)	- 15 Picture image* D/U = -28 dB at D = 64 dBu F(50,50) U = 92 dBu F(50,50)
Channel Accorded Protection n Desired (D)	Potential Interfering Channel n ± r Undesired (U)
C C C B B B A A A	C B A C B A C B A	106 83 68 83 60 45 68 45 30	80 74 72 55 49 47 35 29 27	99 82 75 74 57 50 54 37 30	80 55 35 74 49 29 72 47 27	99 74 54 82 57 37 75 50 30

* Protection Provided at Potential Interfering Channel 64 or 74 dBu Contour.

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Appendix 9 - Table 1: Minimum Distance Separations in Kilometres Required Between Low-Power (LP) VHF and Other VHF Television Allotments and Assignments

Class of Station/System		Channels 2-6			Channels 7-13
		Channel separation r, number of channels above (+) or below (-) the reference channel (n)
		0 Co-channel		± 1 Adjacent	0 Co-channel		± 1 Adjacent
Channel accorded protection (n) Desired (D)	Channel applied for (n + r) Undesired (U)	Non-offset	Offset	D/U = -16 dB D = 47 dBu F(50,50) U = 63 dBu F(50,10)	Non-offset	Offset	D/U = -16 dB D = 56 dBu F(50,50) U = 72 dBu F(50,10)
		D/U = 35 dB D = 47 dBu F(50,50) U = 12 dBu F(50,10)	D/U = 25 dB D = 47 dBu F(50,50) U = 22 dBu F(50,10)		D/U = 35 dB D = 56 dBu F(50,50) U = 21 dBu F(50,10)	D/U = 25 dB D = 56 dBu F(50,50) U = 31 dBu F(50,10)
Regular	LP	209	159	94	158	123	85
LP	LP	132	82	17*	88	53	11*

Note 1: Distances are based on VHF low-power operations having 100 watts ERP and 30 m EHAAT and regular stations operating with the maximum values given in C-1.1.9. For other low-power parameters, the desired-to-undesired (D/U) ratios in the Table must be satisfied.

Note 2: The Grade B contour is 12 kilometres and and 8 kilometres respectively for channel 2-6 and 7-13.

Note 3: In principle, those distances marked with as asterisk (*) may be eliminated if stations are co-sited.

Note 4: Offset operations require a frequency stability of ± 1000 Hz.

Appendix 9 - Table 2: Distance Separations in Kilometres Required to Assure Minimum Interference Within the Grade B Service Area of Low-Power VHF Television Broadcasting Stations from Other Classes of VHF Television Allotments or Assignments

Class of Station/System		Channels 2-6			Channels 7-13
		Channel separation r, number of channels above (+) or below (-) the reference channel (n)
		0 Co-channel		± 1 Adjacent	0 Co-channel		± 1 Adjacent
Channel accorded protection (n) Desired (D)	Channel applied for (n + r) Undesired (U)	Non-offset	Offset	D/U = -16 dB D = 47 dBu F(50,50) U = 63 dBu F(50,10)	Non-offset	Offset	D/U = -16 dB D = 56 dBu F(50,50) U = 72 dBu F(50,10)
		D/U = 35 dB D = 47 dBu F(50,50) U = 12 dBu F(50,10)	D/U = 25 dB D = 47 dBu F(50,50) U = 22 dBu F(50,10)		D/U = 35 dB D = 56 dBu F(50,50) U = 21 dBu F(50,10)	D/U = 25 dB D = 56 dBu F(50,50) U = 31 dBu F(50,10)
LP	Regular	367	290	90	323	258	78
LP	LP	132	82	17*	88	53	11*

Note 1: Distances are based on VHF low-power operations having 100 watts ERP and 30 m EHAAT and regular stations operating with the maximum values given in C-1.1.9. For other low-power parameters, the desired-to-undesired (D/U) ratios in the Table must be satisfied.

Note 2: The Grade B contour is 12 kilometres and and 8 kilometres respectively for channel 2-6 and 7-13.

Note 3: In principle, those distances marked with as asterisk (*) may be eliminated if stations are co-sited.

Note 4: Offset operations require a frequency stability of ± 1000 Hz.

Appendix 9 - Table 3: Minimum Distance Separations in Kilometres Required Between a Low-Power UHF Television Station and Other Classes of UHF Television Allotments or Assignments

Class of Station/System		Channel separation r, number of channels above (+) or below (-) the reference channel n
		0 Co-channel		± 1 Adjacent D/U = -16 dB D = 64 dBu F(50,50) U = 80 dBu F(50,10)	± 2, ± 3, ± 4 Intermodulation D/U = 0 dB D = 100 dBu F(50,50) U = 100 dBu F(50,50)	- 7 Oscillator Radiation D/U = 0 dB D = 74 dBu F(50,50) U = 74 dBu F(50,50)	± 14 Sound Image D/U =-28 dB D = 64 dBu F(50,50) U = 92 dBu F(50,10)	± 15 Picture Image D/U = -10 dB D = 64 dBu F(50,50) U = 74 dBu F(50,10)
Channel accorded protection (n) Desired (D)	Channel applied for (n + r) Undesired (U)	Non-offset	Offset
		D/U = 28 dB D = 64 dBu F(50,50) U = 36 dBu F(50,10)	D/U = 18 dB D = 64 dBu F(50,50) U = 46 dBu F(50,10)
C	LP	140	107	75	20	60	72	77
B	LP	115	82	50	9	37	47	52
A	LP	95	62	30	5	22	27	32
LP	LP	82	49	17*	3*	14	14*	19

Note 1: Distances are based on a UHF low-power operating at 5 kW ERP and 30 metres EHAAT (with a Grade B contour of 12 kilometres) and other UHF stations operating with parameters according to the class designations shown in Section C-1.1.9. For other low-power parameters the desired-to-undesired (D/U) ratios in the Table must be satisfied at the desired contour.

Note 2: In principle, those distances marked with an asterisk (*) may be eliminated if stations are co-sited.

Note 3: Offset operations require a frequency stability of ± 1000 Hz.

Appendix 9 - Table 4: Distance Separations in Kilometres Required to Assure Minimum Interference Within the Grade B (64 dBu) Service Area of Low-Power UHF Television Broadcasting Stations from Other Classes of UHF Television Allotments and Assignments

Class of Station/System		Channel separation r, number of channels above (+) or below (-) the reference channel n
		0 Co-channel		± 1 Adjacent D/U = -16 dB D = 64 dBu F(50,50) U = 80 dBu F(50,10)	± 2, ± 3, ± 4 Intermodulation D/U = 0 dB D = 100 dBu F(50,50) U = 100 dBu F(50,50)	- 7 Oscillator Radiation D/U = 0 dB D = 74 dBu F(50,50) U = 74 dBu F(50,50)	+ 14 Sound Image D/U =-28 dB D = 64 dBu F(50,50) U = 92 dBu F(50,10)	+ 15 Picture Image D/U = -10 dB D = 64 dBu F(50,50) U = 74 dBu F(50,10)
Channel accorded protection (n) Desired (D)	Channel applied for (n + r) Undesired (U)	Non-offset	Offset
		D/U = 28 dB D = 64 dBu F(50,50) U = 36 dBu F(50,10)	D/U = 18 dB D = 64 dBu F(50,50) U = 46 dBu F(50,10)
LP	C	252	192	62	20	60	41	72
LP	B	175	122	35	9	37	24	44
LP	A	114	72	22	5	22	17	27
LP	LP	82	49	17*	3*	14	14*	19

Note 1: Distances are based on a UHF low-power operating at 5 kW ERP and 30 metres EHAAT (with a Grade B contour of 12 kilometres) and other UHF stations operating with parameters according to the class designations shown in Section C-1.1.9. For other low-power parameters the desired-to-undesired (D/U) ratios in the Table must be satisfied at the desired contour.

Note 2: In principle, those distances marked with an asterisk (*) may be eliminated if stations are co-sited.

Note 3: Offset operations require a frequency stability of ± 1000 Hz.