Letter of Understanding Between the Federal Communications Commission of the United States of America and Industry Canada Related to the Use of the 54–72 MHz, 76–88 MHz, 174–216 MHz and 470–806 MHz Bands for the Digital Television Broadcasting Service Along the Common Border

Appendix 2 — Planning and Separation Criteria

1. General

The DTV coverage in a service area with an availability of (90,90) i.e. at 90% of the locations and 90% of the time, except for channels 60 to 69 where it is (50,90) i.e. at 50% of the locations and 90% of the time. To minimize interference during the transition period when both NTSC and DTV are operating, DTV stations were limited to the parameters needed for (50,90) coverage.

For the development of the separation tables in section 4 of this appendix, the following receiving system parameters were used.

Receiving System Parametres
Parameter Low VHF High VHF UHF
Front-to-Back Ratio dB 6 12 16
Minimum required field strength 35 dBμV/m 33 dBμV/m 39 dBμV/m

2. DTV/NTSC System Protection Ratios

The protection ratios are based upon the values resulting from analysis of noise partitioning and interference for co-channel and first adjacent channel and the values from the measurements and tests of the Grand Alliance DTV system.

DTV/NTSC System Protection Ratios
Parameter Value (dB)
Carrier-to-Noise Ratio +19.5
Co-channel D/U Ratio
DTV into NTSC +33.8
NTSC into DTV +7.2
DTV into DTV +19.5
Adjacent Channel D/U Ratio
Lower DTV into NTSC -16
Upper DTV into NTSC -12
Lower NTSC into DTV -48
Upper NTSC into DTV -49
Lower DTV into DTV -27.2
Upper DTV into DTV -27.2
UHF Taboo D/U Ratio, DTV into NTSC
N-2 -24
N+2 -28
N-3 -30
N+3 -34
N-4 -34
N+4 -25
N-7 -35
N+7 -34
N-8 -32
N+8 -43
N+14 -33
N+15 -31
where N is the protected channel
UHF Taboo D/U Ratio, NTSC into DTV
N-2 -62
N+2 -60
N-3 -62
N+3 -62
N-4 -58
N+4 -57
N-7 -58
N+7 -58
N-8 -58
N+8 -58
N+14 -58
N+15 -58

3. Terrain Data and Propagation Models

For calculations involving terrain data, the Canadian Digital Elevation Data (CDED) terrain database 1998, or later, will be used for Canada and the United States Geological Survey 3 Arc Second Terrain Elevation Data, Fall 1989, or later, will be used for the U.S. For calculations involving population, the Statistics Canada, Census Population data, 1996, or later, will be used for Canada and the U.S. Bureau of the Census Public Law 94-171 Population Data, 1990, or later, will be used for the U.S.

Initial calculations will use the appropriate F(50,50) and F(50,10) curves in the existing agreement. For F(50,90) calculations, use the following formula:

F(50,90) = F(50,50) + [F(50,50) - F(50,10)]

For F(90,90) calculations, add 7.1 dB in the UHF band or 6.1 dB in the VHF bands, to the F(50,90) values. For F(10,10) calculations, subtract the above from the F(50,10) values. Where the letter of understanding calls for use of the Longley-Rice model, it will be version 2.1 unless otherwise agreed by exchange of correspondence.

4. Separation Tables

4.1 Class Definitions

These class definitions were developed for Canadian domestic use and are applied toUS DTV allotments only to permit the use of the distance separations in an efficient manner.

DTV Allotments

Class VL - DTV allotments replacing low VHF band NTSC, protected coverage 89 km

Class VU - DTV allotments replacing upper VHF band NTSC, protected coverage 82 km

Class C - DTV allotments replacing UHF band class C NTSC, protected coverage 70 km

Class B - DTV allotments replacing UHF band class B NTSC, protected coverage 45 km

Class A - DTV allotments replacing UHF band class A NTSC, protected coverage 25 km

4.2 Separation Distance Tables

The following separation distances were used to determine the technical acceptability of DTV channel allotments.

Table 4.21 — UHF Band - DTV -> DTV (90,90/10,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 30 50 75 87 94 50 58 83 98 105 75 83 108 123 130
0 112 194 296 363 386 194 175 277 344 367 296 277 287 340 359
1 30 50 75 87 94 50 58 83 98 105 75 83 108 123 130

Table 4.21 — UHF Band - DTV -> DTV (90,90/10,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-1 87 98 123 135 142 94 105 130 142 149
0 363 344 340 352 371 386 367 359 371 378
1 87 98 123 135 142 94 105 130 142 149

Channel -1 means lower first adjacent.

Protection was assessed in both directions and the greater separation distance was used.

Table 4.2.2 — Upper VHF Band - DTV -> DTV (90,90/10,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 30 50 75 87 94 50 57 82 94 101 75 82 99 112 122
1 100 156 224 265 291 156 160 223 260 284 224 223 248 285 309
1 30 50 75 87 94 50 57 82 94 101 75 82 99 112 122

Table 4.2.2 — Upper VHF Band - DTV -> DTV (90,90/10,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-1 84 86 93 100 105 91 93 100 107 111
2 265 260 285 297 321 291 284 309 321 328
1 86 93 83 100 105 91 93 100 107 111

Table 4.2.3 — Lower VHF Band - DTV -> DTV (90,90/10,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 33 53 78 90 97 53 62 87 99 108 78 87 109 123 133
3 132 191 249 286 309 191 211 269 306 329 249 269 294 331 354
1 33 53 78 90 97 53 62 87 99 108 78 87 109 123 133

Table 4.2.3 — Lower VHF Band - DTV -> DTV (90,90/10,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-1 90 99 123 135 145 97 108 133 145 152
4 286 306 331 343 366 309 329 354 366 373
1 90 99 123 135 145 97 108 133 145 152

Table 4.2.4 — UHF Band - DTV -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 26 45 70 82 89 46 47 72 84 91 71 72 77 88 95
5 58 114 204 258 283 114 111 185 239 264 204 185 207 254 276
1 26 46 71 83 90 45 47 72 84 91 70 72 77 89 96

Table 4.2.4 — UHF Band - DTV -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-1 83 84 89 94 101 90 91 96 101 104
6 258 239 254 266 288 283 264 276 288 295
1 82 84 88 94 101 89 91 95 101 104

Channel -1 means lower first adjacent.

Protection was assessed in both directions and the greater separation distance was used.

Table 4.2.5 — Upper VHF Band - DTV -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 26 46 71 83 90 46 47 72 84 91 71 72 74 86 93
7 68 100 154 191 215 100 120 162 193 215 154 162 187 218 240
1 26 46 71 83 90 46 47 72 84 91 71 72 74 86 93

Table 4.2.5 — Upper VHF Band - DTV -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-1 83 84 86 88 94 90 91 93 95 98
8 191 193 218 230 252 215 215 240 252 259
1 83 84 86 88 95 90 91 93 94 98

Table 4.2.6 — Lower VHF Band - DTV -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 26 46 71 83 90 46 48 73 85 92 71 73 78 89 96
9 86 127 180 214 236 127 147 201 234 256 180 200 225 259 281
1 26 46 71 83 90 46 48 73 85 92 71 74 78 90 97

Table 4.2.6 — Lower VHF Band - DTV -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-1 83 85 90 93 100 90 92 97 100 103
0 214 234 259 271 293 236 256 281 293 300
1 83 85 89 93 100 90 92 96 99 103

Table 4.2.7 — UHF Band - DTV -> NTSC (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-15 26 46 71 83 90 28 48 73 85 92 33 53 78 90 97
-14 26 46 71 83 90 28 48 73 85 92 33 53 78 90 97
-8 26 46 71 83 90 28 48 73 85 92 33 70 78 90 97
-7 26 46 71 83 90 28 48 73 85 92 33 70 78 90 97
-4 26 46 71 83 90 28 48 73 85 92 33 70 78 90 97
-3 26 46 71 83 90 27 47 72 84 91 31 71 76 88 96
-2 26 46 71 83 90 45 48 73 85 92 70 71 77 89 95
-1 28 48 73 85 92 46 51 76 88 95 71 72 85 97 104
0 99 100 143 192 215 162 144 169 181 197 241 223 240 252 259
1 28 48 73 85 92 46 51 76 88 95 71 73 86 98 105
2 26 46 71 83 90 27 47 72 84 91 31 71 76 88 95
3 26 46 71 83 90 27 47 72 84 91 31 70 76 88 95
4 26 46 71 83 90 45 48 73 85 92 70 71 78 90 97
7 26 46 71 83 90 28 48 73 85 92 33 70 78 90 97
8 26 46 71 83 90 28 48 73 85 92 33 53 78 90 97
14 0 25 27 29 30 0 45 47 49 50 0 70 72 74 75
15 0 26 27 30 31 0 46 47 50 51 0 71 72 75 76

Table 4.2.7 — UHF Band - DTV -> NTSC (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-15 37 57 82 94 101 42 62 89 101 108
-14 37 57 82 94 101 42 62 89 101 108
-8 37 82 84 94 101 42 89 91 101 108
-7 36 82 83 92 99 40 89 90 99 104
-4 38 82 84 95 102 38 89 91 102 107
-3 34 83 84 91 98 38 90 91 98 102
-2 82 83 86 93 100 89 90 93 100 10
-1 82 84 91 103 110 89 91 100 112 119
0 284 264 277 289 296 313 293 306 318 325
1 83 85 92 104 111 90 92 102 114 121
2 34 83 86 31 98 38 90 93 98 102
3 34 82 84 91 98 38 89 91 98 102
4 82 83 86 94 101 89 90 93 101 108
7 37 82 83 94 101 42 89 90 101 108
8 37 57 84 94 101 42 62 91 101 108
14 0 82 84 86 87 0 89 91 93 94
15 0 83 84 87 88 0 90 91 94 95

Channel -1 means lower first adjacent.

A separation of zero means that interference is unlikely at any separation.

Protection was assessed in both directions and the greater separation distance was used.

Table 4.2.8 — Upper VHF Band - DTV -> NTSC (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 27 47 72 84 91 46 50 75 87 94 71 72 81 93 100
11 93 113 138 150 167 139 147 171 183 190 206 206 231 243 250
1 28 48 73 85 92 46 51 76 88 95 71 73 82 94 101

Table 4.2.8 — Upper VHF Band - DTV -> NTSC (50,90/50,10) Separation distances in km
Int. A B C VU VL
Prot. VU VU VU VU VU
CHAN.
-1 83 84 87 99 106
12 243 239 264 276 283
1 83 85 89 100 107

Table 4.2.9 — Lower VHF Band - DTV - > NTSC (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 29 47 72 84 91 49 53 74 86 93 74 78 88 96 102
13 93 137 193 227 249 116 157 213 247 269 171 191 238 272 294
1 30 47 72 84 91 50 53 74 86 93 75 80 93 104 111

Table 4.2.9 — Lower VHF Band - DTV -> NTSC (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-1 86 90 100 108 114 93 97 107 115 121
14 198 218 250 284 306 214 234 259 291 313
1 87 92 105 116 123 94 99 112 123 130

Table 4.2.10 — UHF Band - NTSC -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-15 0 0 0 0 0 26 46 71 83 90 27 47 72 84 91
-14 0 0 0 0 0 25 45 70 82 89 27 47 72 84 91
-8 26 28 33 37 42 46 48 53 57 62 71 73 78 84 91
-7 26 28 33 37 42 46 48 70 82 89 71 73 78 83 90
-4 26 45 70 82 89 46 48 71 83 90 71 73 78 86 93
-3 26 27 31 34 38 46 47 70 82 89 71 72 76 84 91
-2 26 27 31 34 38 46 47 71 83 90 71 72 76 86 93
-1 28 46 71 83 90 48 51 73 85 92 73 76 86 92 102
0 99 162 241 284 313 100 144 223 264 293 143 169 240 277 306
1 28 46 70 82 89 48 51 72 84 91 73 76 85 91 100
2 26 45 70 82 89 46 48 71 83 90 71 73 77 86 93
3 26 27 31 34 38 46 47 71 83 90 71 73 76 84 91
4 26 28 33 38 38 46 48 70 82 89 71 73 78 84 91
7 26 28 33 36 40 46 48 70 82 89 71 73 78 83 90
8 26 28 33 37 42 46 48 70 82 89 71 73 78 84 91
14 26 28 33 37 42 46 48 53 57 62 71 73 78 82 89
15 26 28 33 37 42 46 48 53 57 62 71 73 78 82 89

Table 4.2.10 — UHF Band - NTSC -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-15 30 50 75 87 94 31 51 76 88 95
-14 29 49 74 86 93 30 50 75 87 94
-8 83 85 90 94 101 90 92 97 101 108
-7 83 85 90 94 101 90 92 97 101 108
-4 83 85 90 94 101 90 92 97 101 108
-3 83 84 88 91 98 90 91 95 98 102
-2 83 84 88 91 98 90 91 95 98 102
-1 85 88 98 104 114 92 95 105 111 121
0 192 181 252 289 318 215 197 259 296 325
1 85 88 97 103 112 92 95 104 110 119
2 83 85 89 93 100 90 92 96 100 104
3 83 84 88 91 98 90 91 95 98 102
4 83 85 90 95 102 90 92 97 102 107
7 83 85 90 92 99 90 92 97 99 104
8 83 85 90 94 101 90 92 97 101 108
14 83 85 90 94 101 90 92 97 101 108
15 83 85 90 94 101 90 92 97 101 108

Channel -1 means lower first adjacent.

A separation of zero means that interference is unlikely at any separation.

Protection was assessed in both directions and the greater separation distance was used.

Table 4.2.11 — Upper VHF Band - NTSC -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU A B C VU A B C VU
Prot. A A A A B B B B C C C C
CHAN.
-1 28 46 71 83 48 51 73 85 73 76 82 89
15 93 138 206 243 113 146 206 240 138 171 231 264
1 27 46 71 83 47 50 72 84 72 75 81 87

Table 4.2.11 — Upper VHF Band - NTSC -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU A B C VU
Prot. VU VU VU VU VL VL VL VL
CHAN.
-1 84 88 94 100 92 95 101 107
16 150 183 243 276 166 190 250 283
1 84 87 93 99 91 94 100 106

Table 4.2.12 — Lower VHF Band - NTSC -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL A B C VU VL
Prot. A A A A A B B B B B C C C C C
CHAN.
-1 30 50 75 87 94 47 55 80 92 99 72 74 93 105 112
0 93 116 171 198 214 137 157 191 218 234 193 213 238 250 259
1 29 49 74 86 93 47 53 78 90 97 72 74 88 100 107

Table 4.2.12 — Lower VHF Band - NTSC -> DTV (50,90/50,10) Separation distances in km
Int. A B C VU VL A B C VU VL
Prot. VU VU VU VU VU VL VL VL VL VL
CHAN.
-1 84 86 103 116 123 91 93 111 123 130
0 227 247 272 284 291 249 269 294 306 313
1 84 86 96 108 115 91 93 102 114 121

4.3 Maximum Parameters Associated with Classes

Table 4.3.1 — Maximum Permissible Parameters for DTV Stations During Transition
Class UHF ERP UHF HAAT UPPER VHF ERP UPPER VHF HAAT LOWER VHF ERP LOWER VHF HAAT
VL 250 kW 300 m 3.3 kW 300 m 7 kW 300 m
VU 107 kW 300 m 1.3 kW 300 m 3 kW 300 m
C 15 kW 300 m 300 W 300 m 700 W 300 m
B 800 W 150 m 40 W 150 m 130 W 150 m
A 40 W 100 m 5 W 100 m 15 W 100 m

Table 4.3.2 — Maximum Permissible Parameters for DTV Stations After Transition
Class UHF ERP UHF HAAT UPPER VHF ERP UPPER VHF HAAT LOWER VHF ERP LOWER VHF HAAT
VL 1 MW 325 m 14 kW 300 m 28 kW 300 m
VU 550 kW 300 m 5 kW 300 m 12 kW 300 m
C 75 kW 300 m 1200 W 300 m 3 kW 300 m
B 4 kW 150 m 160 W 150 m 550 W 150 m
A 200 W 100 m 20 W 100 m 65 W 100 m

NTSC Allotments

NTSC allotments have the same coverage as the same DTV class. In the case of Canadian VHF stations, classes have been assigned in accordance with current coverage.

Table 4.3.3 — Maximum Permissible Parameters for NTSC Stations During Transition
Class UHF ERP UHF HAAT UPPER VHF ERP UPPER VHF HAAT LOWER VHF ERP LOWER VHF HAAT
VL 5 MW 360 m NA NA 100 kW 150 m
VU 4.5 MW 300 m 325 kW 150 m 50 kW 150 m
C 1 MW 300 m 80 kW 150 m 17 kW 150 m
B 100 kW 150 m 5 kW 150 m 1.2 kW 150 m
A 10 kW 100 m 700 W 100 m 200 W 100 m

Appendix 3 - Procedure used for Assessing Compatibility of Assignments and Allotments in the PlanFootnote *

  1. If the allotment met the spacing requirements in Appendix 2, the allotment was deemed compatible and listed in the Plan.
  2. If the allotment did not meet the spacing requirements, but the affected Administration considered the interference was acceptable, the allotment was deemed compatible and listed in the Plan.
  3. If the allotment did not meet the spacing requirements, and the affected Administration did not consider the interference to be acceptable, a study using pertinent Height Above Average Terrain (HAAT) in directions toward affected stations obtained from terrain data and TV propagation curves was performed. If the study showed no interference, the allotment was deemed compatible and listed in the Plan.
  4. If the allotment did not meet the requirements of 1, 2 or 3 above, a study using the PREDICT terrain-based propagation model in Canada and the Longley-Rice model in the United States was performed. If the study showed no interference, the allotment was deemed compatible and listed in the Plan.
  5. If the terrain-based study on the allotment showed interference and the affected Administration considered the interference to be acceptable, the allotment was deemed compatible and listed in the Plan.
  6. All proposed allotments of both countries were accepted, although, in a few cases, compatibility was predicted on adjustments noted in the Plan.
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