Case Study: Measurements of Radio Frequency Exposure from Wi-Fi Devices

Annex E – Detailed Measurement Results

This annex provides the detailed results of each test case performed in this study. The maximum value represents the maximum instantaneous value measured during the measurement time period, and the minimum value represents the minimum instantaneous value measured during the measurement time period. The average value represents the average value measured during the measurement time period.

1a) Ambient levels from 50 MHz to 6 GHz at each measurement location with the tri-axis antenna positioned at a height of 1.75 metres

Table E.1 – Percentage of SC6 limits (uncontrolled environment) at a height of 1.75 metres from 50 MHz to 6 GHz
Locationa Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
P1 0.002527 0.005386 0.002057
P2 0.002498 0.003360 0.002083
P3 0.002545 0.003978 0.002098
P4 0.002589 0.005431 0.002129
P5 0.002632 0.006384 0.002149
P6 0.002846 0.013032 0.002159
P7 0.002640 0.004001 0.002185
P8 0.002691 0.004851 0.002197
P9 0.002674 0.004687 0.002243
P10 0.002717 0.004865 0.002269
P11 0.002741 0.006172 0.002241
P12 0.002754 0.007066 0.002250

a See Figure 4 for measurement locations.

2a) Ambient levels from 50 MHz to 6 GHz at one measurement location with the tri-axis antenna positioned at a height of 1.25 metres

Table E.2 – Percentage of SC6 limits (uncontrolled environment) at a height of 1.25 metres from 50 MHz to 6 GHz
Location Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
P11 0.002855 0.011449 0.002276

Table E.3 and Table E.4 list the measured percentages of SC6 limits for each specific service operating in the frequency band from 50 MHz to 6 GHz at location P11.

Table E.3 – Percentage of SC6 limits (uncontrolled environment) for each service in the frequency range from 50 MHz to 3 GHz (ambient environment)
Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
50 54 Mixed L/M 0.000035 0.000077 0.000015
54 72 TV Ch. 2-4 0.000098 0.000134 0.000069
72 76 Mixed LM 0.000017 0.000032 0.000006
76 88 TV CH5 - 6 0.000041 0.000057 0.000027
88 108 FM Broadcast 0.000050 0.000070 0.000032
108 136 Aeronautical 0.000050 0.000070 0.000036
136 174 Land Mobile 0.000056 0.000073 0.000040
174 216 TV Ch. 7-13 0.000046 0.000059 0.000040
216 300 Mixed L/M 0.000062 0.000079 0.000052
300 406 Mixed L/M 0.000050 0.000058 0.000043
406 470 Land Mobile 0.000021 0.000025 0.000018
470 608 TV Ch. 14-36 0.000024 0.000028 0.000022
608 614 Radio Astronomy 0.000001 0.000001 0.000000
614 806 TV CH 38 - 69 0.000026 0.000028 0.000023
806 824 Trunking/Paging 0.000002 0.000003 0.000002
824 849 Cellular Mob TX 0.000003 0.000005 0.000002
849 869 Trunking/Paging 0.000003 0.000004 0.000002
869 894 Cellular BaseTX 0.000003 0.000004 0.000002
894 960 Trunk/Page/Fix 0.000007 0.000009 0.000006
960 1300 AirTrafficRadar 0.000036 0.000039 0.000033
1300 1452 MoSAT / SRS 0.000010 0.000011 0.000008
1452 1492 DAB 0.000002 0.000003 0.000002
1492 1500 MoSat / SRS 0.000001 0.000001 0.000000
1500 1518 MoSat / SRS 0.000001 0.000002 0.000001
1518 1670 MoSAT/Fixed 0.000011 0.000013 0.000010
1670 1675 Fixed / Mobile 0.000000 0.000001 0.000000
1675 1710 Mteorg / Fixed 0.000003 0.000003 0.000002
1710 1755 AWS LwrTX (A-F) 0.000004 0.000005 0.000003
1755 1850 MSS / Fixed 0.000009 0.000010 0.000007
1850 1910 PCS LwrTX 0.000007 0.000008 0.000006
1910 1915 AWS LwrTX (G) 0.000000 0.000001 0.000000
1915 1930 Licence Exempt 0.000002 0.000003 0.000001
1930 1990 PCS UpTX 0.000010 0.000012 0.000008
1990 1995 AWS UpTX (G) 0.000001 0.000001 0.000000
1995 2110 MSS / D-FIX 0.000018 0.000020 0.000015
2110 2155 AWS UpTX( (A-F) 0.000009 0.000011 0.000006
2155 2305 Fixed / Mobile 0.000036 0.000041 0.000032
2305 2320 WCS 0.000004 0.000007 0.000003
2320 2345 S-DARS 0.000008 0.000011 0.000005
2345 2360 WCS 0.000005 0.000007 0.000004
2360 2400 MATS 0.000013 0.000017 0.000010
2400 Wi-Fi Band 2483.5 Wi-Fi Band LIC EXEMPT Wi-Fi Band 0.000199 Wi-Fi Band 0.008268 Wi-Fi Band 0.000026 Wi-Fi Band
2483.5 2500 MoSAT 0.000006 0.000009 0.000004
2500 2596 MCS 0.000036 0.000041 0.000032
2596 2686 MDS 0.000034 0.000039 0.000029
2686 2690 MDS / MDS (Rtr) 0.000002 0.000003 0.000001
2692 3000 Aeronautical 0.000198 0.000211 0.000178
    Total (%) 0.001225 0.009574 0.000830

Note: Bold represents the Wi-Fi bands in Canada.

Table E.4 – Percentage of SC6 limits (uncontrolled environment) for each service in the frequency range from 3 to 6 GHz (ambient environment)
Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
3000 3100 Radionavigation 0.000006 0.000007 0.000005
3100 3300 Radar / Sat 0.000011 0.000012 0.000010
3300 3400 Radar / Amateur 0.000007 0.000008 0.000006
3400 3475 FWA (A-C) 0.000006 0.000008 0.000005
3475 3500 FWA (D) 0.000003 0.000003 0.000002
3500 3525 FWA(E)/C-Band 0.000003 0.000003 0.000002
3525 3550 FWA(F)/C-Band 0.000003 0.000004 0.000002
3550 3575 FWA(G)/C-Band 0.000003 0.000004 0.000002
3575 3600 FWA(H)/C-Band 0.000003 0.000004 0.000002
3600 3625 FWA(J)/C-Band 0.000003 0.000004 0.000002
3625 3650 FWA(K)/C-Band 0.000003 0.000005 0.000002
3650 3700 WBS/C-Band 0.000007 0.000009 0.000005
3700 4200 C-BAND SAT 0.000075 0.000079 0.000070
4200 4400 Aeronautical 0.000049 0.000054 0.000045
4400 5000 Fixed 0.000308 0.000328 0.000285
5000 5150 Aeronautical 0.000090 0.000099 0.000077
5150 Wi-Fi Band 5250 Wi-Fi Band ISM / LicEx Wi-Fi Band 0.000060 Wi-Fi Band 0.000073 Wi-Fi Band 0.000053 Wi-Fi Band
5250 Wi-Fi Band 5350 Wi-Fi Band Radar / LicEx. Wi-Fi Band 0.000068 Wi-Fi Band 0.000077 Wi-Fi Band 0.000059 Wi-Fi Band
5350 5460 ARNS 0.000095 0.000110 0.000084
5460 5470 Radar 0.000009 0.000015 0.000005
5470 Wi-Fi Band 5650 Wi-Fi Band Marit Radar Wi-Fi Band 0.000193 Wi-Fi Band 0.000219 Wi-Fi Band 0.000176 Wi-Fi Band
5650 Wi-Fi Band 5725 Wi-Fi Band Amateur Wi-Fi Band 0.000101 Wi-Fi Band 0.000134 Wi-Fi Band 0.000082 Wi-Fi Band
5725 Wi-Fi Band 5825 Wi-Fi Band Lic. Exempt Wi-Fi Band 0.000152 Wi-Fi Band 0.000173 Wi-Fi Band 0.000133 Wi-Fi Band
5825 5925 Fixed 0.000180 0.000221 0.000162
5925 6000 C-Band Sat 0.000155 0.000182 0.000136
    Total (%): 0.001594 0.001836 0.001413

Note: Bold represents the Wi-Fi bands in Canada.

Figure E.1 and Figure E.2 represent the signals in the ambient environment when all wireless devices were non-operational in the boardroom at location P11. As shown in Figure E.1, the Narda SRM 3006 meter was able to capture licence-exempt devices, such as Wi-Fi access points in the 2.4 GHz band, which were located in the area. In addition, cellular services in the 800 and 1900 MHz bands were prevalent and captured on the meter.

Figure E.1 – Signals in the RF ambient environment for the 50 MHz to 3 GHz frequency band

Figure E.2 – Signals in the RF ambient environment for the 3 to 6 GHz frequency band

3a) Ambient levels from 50 MHz to 6 GHz at one measurement location with the tri-axis antenna positioned at a height of 1.25 metres for a sweep time of 6 minutes

Table E.5 – Percentage of SC6 limits (uncontrolled environment) at a height of 1.25 metres from 50 MHz to 6 GHz for 6 minutes time averaging
Location Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
P11 0.002735 0.013794 0.002232

4a) Ambient levels from 50 MHz to 6 GHz at one measurement location with a nine-point matrix representing a cross-section of the human body

Table E.6 – Percentage of SC6 limits (uncontrolled environment) for each point of the nine-point matrix for spatial averaging of RF ambient field strength values from 50 MHz to 6 GHz (location P11)
  Total width (0.35 m)
Height
(0.5 m to 1.75 m)
0.00285% 0.00275% 0.00269%
0.00282% 0.00272% 0.00274%
0.00277% 0.00268% 0.00293%

Spatial averaging of the nine-point matrix (% SC6 limits): 0.00277%

1b) RF exposure levels from 2.4 to 5.825 GHz at each preselected measurement location with the tri-axis antenna positioned at a height of 1.75 metres

Table E.7 lists the measured percentages of the SC6 limits when both Wi-Fi APs were operational and all Wi-Fi-enabled devices were in downloading mode. The percentages of the SC6 limits were measured within the Wi-Fi bands from 2400 to 2483.5 MHz, 5150 to 5350 MHz, and 5470 to 5825 MHz. "Other" represents the contribution from other services operating in the frequency bands from 2483.5 to 5150 MHz and from 5350 to 5470 MHz.

Table E.7 – Percentage of SC6 limits (uncontrolled environment) for Wi-Fi bands at each location with the tri-axis antenna at a height of 1.75 metres
Locationa Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
P1 2400 2483.5 Wi-Fi 2.4 GHz 0.004735 0.007653 0.000036
5150 5350 Wi-Fi Low 5 GHz 0.044205 0.072308 0.032271
5470 5825 Wi-Fi Low 5 GHz 0.001070 0.001078 0.001118
Subtotal (Wi-Fi) 0.050010 0.081040 0.033749
    Other 0.001759 0.001724 0.001810
Total 0.051769 0.082764 0.035559
P2 2400 2483.5 Wi-Fi 2.4 GHz 0.008658 0.061424 0.002647
5150 5350 Wi-Fi Low 5 GHz 0.043953 0.0362364 0.032649
5470 5825 Wi-Fi Low 5 GHz 0.001084 0.001037 0.001070
Subtotal (Wi-Fi) 0.053695 0.098697 0.036366
    Other 0.001767 0.001763 0.001725
Total 0.055462 0.100460 0.038091
P3 2400 2483.5 Wi-Fi 2.4 GHz 0.007164 0.015010 0.000368
5150 5350 Wi-Fi Low 5 GHz 0.018175 0.027389 0.015431
5470 5825 Wi-Fi Low 5 GHz 0.001079 0.001096 0.001130
Subtotal (Wi-Fi) 0.026419 0.043495 0.016929
    Other 0.001775 0.001749 0.001776
Total 0.028194 0.045244 0.018705
P4 2400 2483.5 Wi-Fi 2.4 GHz 0.028911 0.153082 0.000016
5150 5350 Wi-Fi Low 5 GHz 0.007905 0.006924 0.006152
5470 5825 Wi-Fi Low 5 GHz 0.001096 0.001130 0.001121
Subtotal (Wi-Fi) 0.037912 0.161136 0.000729
    Other 0.001779 0.001787 0.001724
Total 0.039691 0.162923 0.009014
P5 2400 2483.5 Wi-Fi 2.4 GHz 0.102474 0.403164 0.002500
5150 5350 Wi-Fi Low 5 GHz 0.014984 0.012339 0.012737
5470 5825 Wi-Fi Low 5 GHz 0.001102 0.001087 0.001073
Subtotal (Wi-Fi) 0.118560 0.416590 0.016310
    Other 0.001796 0.001792 0.001760
Total 0.120356 0.418382 0.018070
P6 2400 2483.5 Wi-Fi 2.4 GHz 0.017882 0.065530 0.006459
5150 5350 Wi-Fi Low 5 GHz 0.034485 0.029514 0.026282
5470 5825 Wi-Fi Low 5 GHz 0.001103 0.001141 0.001075
Subtotal (Wi-Fi) 0.05347 0.096185 0.033816
    Other 0.001801 0.001783 0.001712
Total 0.055271 0.097968 0.035528
P7 2400 2483.5 Wi-Fi 2.4 GHz 0.009528 0.063536 0.005327
5150 5350 Wi-Fi Low 5 GHz 0.026598 0.025371 0.016514
5470 5825 Wi-Fi Low 5 GHz 0.001100 0.001053 0.001059
Subtotal (Wi-Fi) 0.037227 0.089960 0.022900
    Other 0.001800 0.001826 0.001847
Total 0.039027 0.091786 0.024747
P8 2400 2483.5 Wi-Fi 2.4 GHz 0.001924 0.003287 0.000313
5150 5350 Wi-Fi Low 5 GHz 0.228547 0.291060 0.156598
5470 5825 Wi-Fi Low 5 GHz 0.001399 0.001424 0.001430
Subtotal (Wi-Fi) 0.231870 0.295771 0.158341
    Other 0.002299 0.002359 0.002274
Total 0.234169 0.298130 0.160615
P9 2400 2483.5 Wi-Fi 2.4 GHz 0.001850 0.000543 0.003111
5150 5350 Wi-Fi Low 5 GHz 0.140841 0.195879 0.104190
5470 5825 Wi-Fi Low 5 GHz 0.001409 0.001503 0.001454
Subtotal (Wi-Fi) 0.144100 0.197925 0.108755
    Other 0.002290 0.002296 0.002262
Total 0.146390 0.200221 0.111017
P10 2400 2483.5 Wi-Fi 2.4 GHz 0.008325 0.035362 0.000014
5150 5350 Wi-Fi Low 5 GHz 0.028610 0.032092 0.020040
5470 5825 Wi-Fi Low 5 GHz 0.001397 0.001381 0.001463
Subtotal (Wi-Fi) 0.038333 0.068835 0.021517
    Other 0.002308 0.002305 0.002279
Total 0.040641 0.071140 0.023796
P11 2400 2483.5 Wi-Fi 2.4 GHz 0.033791 0.105839 0.000051
5150 5350 Wi-Fi Low 5 GHz 0.018507 0.017489 0.013263
5470 5825 Wi-Fi Low 5 GHz 0.001418 0.001392 0.001401
Subtotal (Wi-Fi) 0.053716 0.124720 0.014715
    Other 0.002302 0.002286 0.002316
Total 0.056018 0.127006 0.017031
P12 2400 2483.5 Wi-Fi 2.4 GHz 0.046572 0.186518 0.000825
5150 5350 Wi-Fi Low 5 GHz 0.016836 0.017990 0.013761
5470 5825 Wi-Fi Low 5 GHz 0.001421 0.001408 0.001386
Subtotal (Wi-Fi) 0.064829 0.205916 0.015972
    Other 0.002311 0.002253 0.002317
Total 0.067140 0.208169 0.018289

a See Figure 4 for measurement locations.

2b) RF exposure levels from 2.4 to 5.825 GHz at each preselected measurement location with the tri-axis antenna positioned at a height of 1.25 metres

Table E.8 – Percentage of SC6 limits (uncontrolled environment) for Wi-Fi bands at each location with the tri-axis antenna at a height of 1.25 metres
Locationa Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
P1 2400 2483.5 Wi-Fi 2.4 GHz 0.003580 0.034979 0.000624
5150 5350 Wi-Fi Low 5 GHz 0.065602 0.072193 0.047365
5470 5825 Wi-Fi Low 5 GHz 0.000721 0.000706 0.000696
Subtotal (Wi-Fi) 0.069903 0.107878 0.048685
    Other 0.001178 0.001196 0.00114
Total 0.071081 0.109074 0.049825
P2 2400 2483.5 Wi-Fi 2.4 GHz 0.003151 0.006556 0.003967
5150 5350 Wi-Fi Low 5 GHz 0.031888 0.041673 0.020565
5470 5825 Wi-Fi Low 5 GHz 0.004294 0.004189 0.004254
Subtotal (Wi-Fi) 0.039333 0.052418 0.028786
    Other 0.006982 0.006899 0.006855
Total 0.046315 0.059317 0.035641
P3 2400 2483.5 Wi-Fi 2.4 GHz 0.004380 0.012621 0.000123
5150 5350 Wi-Fi Low 5 GHz 0.019723 0.024176 0.015182
5470 5825 Wi-Fi Low 5 GHz 0.004267 0.004282 0.004252
Subtotal (Wi-Fi) 0.028370 0.041079 0.019557
    Other 0.006949 0.007020 0.006831
Total 0.035319 0.048099 0.026388
P4 2400 2483.5 Wi-Fi 2.4 GHz 0.022426 0.073809 0.000678
5150 5350 Wi-Fi Low 5 GHz 0.013593 0.016411 0.010180
5470 5825 Wi-Fi Low 5 GHz 0.004272 0.004240 0.004136
Subtotal (Wi-Fi) 0.040291 0.094460 0.014994
    Other 0.006994 0.006972 0.006984
Total 0.047285 0.101432 0.021978
P5 2400 2483.5 Wi-Fi 2.4 GHz 0.220791 0.926314 0.000063
5150 5350 Wi-Fi Low 5 GHz 0.008580 0.009547 0.007806
5470 5825 Wi-Fi Low 5 GHz 0.004244 0.004231 0.003970
Subtotal (Wi-Fi) 0.233614 0.940092 0.011839
    Other 0.006977 0.007067 0.007084
Total 0.240591 0.947159 0.018923
P6 2400 2483.5 Wi-Fi 2.4 GHz 0.020515 0.081288 0.000368
5150 5350 Wi-Fi Low 5 GHz 0.015473 0.016321 0.011955
5470 5825 Wi-Fi Low 5 GHz 0.001438 0.001459 0.001493
Subtotal 0.037426 0.099068 0.013816
    Other 0.002345 0.002320 0.002359
Total 0.039771 0.101388 0.016175
P7 2400 2483.5 Wi-Fi 2.4 GHz 0.020169 0.060808 0.003015
5150 5350 Wi-Fi Low 5 GHz 0.029016 0.036393 0.020209
5470 5825 Wi-Fi Low 5 GHz 0.001428 0.001300 0.001385
Subtotal (Wi-Fi) 0.050612 0.098501 0.024609
    Other 0.002333 0.002290 0.002378
Total 0.052945 0.100791 0.026987
P8 2400 2483.5 Wi-Fi 2.4 GHz 0.003571 0.008332 0.000302
5150 5350 Wi-Fi Low 5 GHz 0.137439 0.216658 0.089318
5470 5825 Wi-Fi Low 5 GHz 0.001422 0.001330 0.001387
Subtotal (Wi-Fi) 0.142432 0.226320 0.091007
    Other 0.002331 0.002385 0.002365
Total 0.144763 0.228705 0.093372
P9 2400 2483.5 Wi-Fi 2.4 GHz 0.005426 0.018015 0.000891
5150 5350 Wi-Fi Low 5 GHz 0.053570 0.060559 0.041570
5470 5825 Wi-Fi Low 5 GHz 0.001413 0.001398 0.001310
Subtotal (Wi-Fi) 0.060410 0.079882 0.043771
    Other 0.002337 0.002354 0.002342
Total 0.062747 0.082326 0.046113
P10 2400 2483.5 Wi-Fi 2.4 GHz 0.005442 0.013639 0.000066
5150 5350 Wi-Fi Low 5 GHz 0.024338 0.037097 0.017275
5470 5825 Wi-Fi Low 5 GHz 0.001408 0.001464 0.001384
Subtotal (Wi-Fi) 0.031187 0.052200 0.018725
    Other 0.002326 0.002320 0.002326
Total 0.033513 0.054520 0.021051
P11 2400 2483.5 Wi-Fi 2.4 GHz 0.011916 0.067794 0.000290
5150 5350 Wi-Fi Low 5 GHz 0.019791 0.018873 0.016421
5470 5825 Wi-Fi Low 5 GHz 0.001411 0.001354 0.001354
Subtotal (Wi-Fi) 0.033118 0.088021 0.018065
    Other 0.002321 0.002308 0.002287
Total 0.035439 0.090329 0.020352
P12 2400 2483.5 Wi-Fi 2.4 GHz 0.047716 0.213234 0.000014
5150 5350 Wi-Fi Low 5 GHz 0.015246 0.014393 0.010589
5470 5825 Wi-Fi Low 5 GHz 0.001415 0.001385 0.001425
Subtotal (Wi-Fi) 0.064605 0.229012 0.012028
    Other 0.002315 0.002315 0.002271
Total 0.066692 0.231327 0.014299

a See Figure 4 for measurement locations.

3b) Spatial- and time-averaged RF exposure levels from 2.4 to 5.825 GHz at the location with the highest levels found from 1b and 2b

Table E.9 – Spatial- and time-averaged percentage of SC6 limits (uncontrolled environment) from 2400 to 5825 MHz at location P5
  Total width (0.35 m)
Height (0.5 m to 1.75 m) Time Avg for 6 min: 0.105392% Time Avg for 6 min: 0.133299% Time Avg for 6 min: 0.141245%
Time Avg for 6 min: 0.053149% Time Avg for 6 min: 0.154457% Time Avg for 6 min: 0.141279%
Time Avg for 6 min: 0.047408% Time Avg for 6 min: 0.056150% Time Avg for 6 min: 0.061859%

Time and spatial averaging of the nine-point matrix (% SC6 limits): 0.099360%

4b) RF exposure levels for eight laptops connected to AP2 in uploading mode at a preselected measurement location with the tri-axis antenna positioned at a height of 1.25 metres

Table E.10 – Percentage of SC6 limits (uncontrolled environment) for Wi-Fi bands with eight laptops in uploading mode
Location Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
50 cm from P7 2400 2483.5 Wi-Fi 2.4 GHz 0.006360 0.031755 0.001070
5150 5350 Wi-Fi Low 5 GHz 0.056737 0.057610 0.043178
5470 5825 Wi-Fi Low 5 GHz 0.002684 0.002508 0.002765
Subtotal (Wi-Fi) 0.065780 0.091873 0.047013
    Other 0.004424 0.004413 0.004427
Total 0.070204 0.096286 0.051440

5b) RF exposure levels for eight laptops connected to AP2 in uploading mode and 16 laptops in downloading mode at a preselected measurement location with the tri-axis antenna positioned at a height of 1.25 metres

Table E.11 – Percentage of SC6 limits (uncontrolled environment) for Wi-Fi bands with eight laptops uploading and 16 laptops downloading
Location Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
50 cm from P7 2400 2483.5 Wi-Fi 2.4 GHz 0.004548 0.045900 0.003339
5150 5350 Wi-Fi Low 5 GHz 0.051387 0.049386 0.032502
5470 5825 Wi-Fi Low 5 GHz 0.000672 0.000676 0.000666
Subtotal (Wi-Fi) 0.056607 0.095962 0.036507
    Other 0.001104 0.001094 0.001113
Total 0.057711 0.097056 0.037620

6b) RF exposure levels for one laptop connected to AP2 in uploading mode at a preselected measurement location with the tri-axis antenna positioned at a height of 1.25 metres

Table E.12 – Percentage of SC6 limits (uncontrolled environment) for Wi-Fi bands with one laptop uploading
Location Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
50 cm from P7 2400 2483.5 Wi-Fi 2.4 GHz 0.003791 0.008447 0.001496
5150 5350 Wi-Fi Low 5 GHz 0.052724 0.064955 0.036069
5470 5825 Wi-Fi Low 5 GHz 0.000603 0.000625 0.000596
Subtotal (Wi-Fi) 0.057118 0.074027 0.038161
    Other 0.000990 0.000985 0.000974
Total 0.058108 0.075012 0.039135

7b) RF exposure levels for one laptop connected to AP2 in downloading mode at a preselected measurement location with the tri-axis antenna positioned at a height of 1.25 metres

Table E.13 – Percentage of SC6 limits (uncontrolled environment) for Wi-Fi bands with one laptop downloading
Location Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
50 cm from P7 2400 2483.5 Wi-Fi 2.4 GHz 0.007008 0.023605 0.003691
5150 5350 Wi-Fi Low 5 GHz 0.068841 0.090550 0.039203
5470 5825 Wi-Fi Low 5 GHz 0.000413 0.000399 0.000396
Subtotal (Wi-Fi) 0.076263 0.114554 0.043290
    Other 0.000670 0.000673 0.000668
Total 0.076933 0.115227 0.043958

8b) RF exposure levels from 5150 to 5350 MHz with the tri-axis antenna positioned at 20 cm from AP1

Table E.14 – Percentage of SC6 limits (uncontrolled environment) at 20 cm from Wi-Fi AP1 antenna
Location Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
20 cm from AP1 5150 5350 Wi-Fi Low 5 GHz 6.679538 10.585600 4.221111

9b) RF exposure levels from 2400 to 2483.5 MHz with the tri-axis antenna positioned at 20 cm from AP2

Table E.15 – Percentage of SC6 limits (uncontrolled environment) at 20 cm from Wi-Fi AP2
Location Lower frequency
(MHz)
Upper frequency
(MHz)
Service name Average
(% SC6 limits)
Maximum
(% SC6 limits)
Minimum
(% SC6 limits)
20 cm from AP2 2400 2483.5 Wi-Fi 2.4 GHz 1.824045 7.733128 0.000897

References

(1) Industry Canada GL-01, Guidelines for the Measurement of Radio Frequency Fields at Frequencies from 3 kHz to 300 GHz
http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01451.html

(2) Industry Canada GL-08, Guidelines for the Preparation of Radio Frequency (RF) Exposure Compliance Reports for Radiocommunication and Broadcasting Antenna Systems
http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf09945.html

(3) Industry Canada RSS-102 Radio Frequency (RF) Exposure Compliance of Radiocommunication Apparatus (All Frequency Bands)
http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01904.html

(4) Industry Canada's RSS-210 Low-power Licence-exempt Radiocommunication Devices (All Frequency Bands): Category I Equipment
http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01320.html

(5) Industry Canada's TN-329 Safety Code 6 (SC6) Measurement Procedures (Uncontrolled Environment)
http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf09977.html

(6) Health Canada, Limits of Human Exposure to Radiofrequency Electromagnetic Energy in the Frequency Range from 3 kHz to 300 GHz - Safety Code 6 (2009)
http://www.hc-sc.gc.ca/ewh-semt/pubs/radiation/radio_guide-lignes_direct-eng.php

(7) Health Canada, Technical Guide for the Interpretation and Compliance Assessment of Health Canada's Radiofrequency Exposure Guidelines
http://www.hc-sc.gc.ca/ewh-semt/pubs/radiation/radio_guide-lignes_direct-eng.php


Footnotes

  1. 1 "Limits for uncontrolled environments" and "limits for controlled environments" are the terms used in the current (2009) edition of SC6. The limits for uncontrolled environments typically apply to the general public. In previous versions of SC6, these limits were defined as the "general public limits."
  2. 2 See GL-01, Guidelines for the Measurement of Radio Frequency Fields at Frequencies from 3 kHz to 300 GHz (http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01451.html).
  3. 3 See TN-329, Safety Code 6 (SC6) Measurement Procedures (Uncontrolled Environment) (http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf09977.html).
  4. 4 See RSS-210, Licence-exempt Radio Apparatus (All Frequency Bands): Category I Equipment (http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01320.html).
  5. 5 See RSS-102, Radio Frequency (RF) Exposure Compliance of Radiocommunication Apparatus (All Frequency Bands) (http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01904.html).
  6. 6 See Health Canada's Limits of Human Exposure to Radiofrequency Electromagnetic Energy in the Frequency Range from 3 kHz to 300 GHz — Safety Code 6 (2009) (http://www.hc-sc.gc.ca/ewh-semt/pubs/radiation/radio_guide-lignes_direct-eng.php).
  7. 7 RF exposure evaluation is the method used to evaluate the RF field strength levels generated by a device. RF exposure evaluation is required if the separation distance between the user and the device is greater than 20 cm.
  8. 8 Wi-Fi access points are commonly called "Wi-Fi routers."
  9. 9 SAR evaluation is the method used to evaluate the SAR levels from a device by physical measurement or computational modeling techniques. SAR evaluation is required if the separation distance between the user or bystanders and the device is less than or equal to 20 cm.
  10. 10 A sweep is defined as the time required for one spectrum (frequency band, or bands, under investigation) to be measured and displayed.
  11. 11 Continuous transmission represents a duty cycle of approximately 100%.
  12. 12 Determination of the e.i.r.p. was based on radiated emission tests performed in an anechoic chamber at 3 metres from the access points with their conducted power set at 24 dBm.
  13. 13 Wi-Fi transmitted signals during regular operation (i.e. not in test mode) are pulsed, with a low duty cycle.
  14. 14 Available at http://www.netstumbler.com.
  15. 15 Available at http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01451.html.
  16. 16 Available at http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf09977.html.
  17. 17 At 20 cm, the tri-axis antenna was located in the near field because the antenna of AP1 is considered an electrically large antenna (D = 17 cm). E and H field measurements would be required at 20 cm. However, H field measurements were not performed during this case study.
  18. 18 The highest values for expanded measurement uncertainty, + 2.9 /-4.3 dB, were added to the measured RF exposure value.
  19. 19 A distance of 20 cm represents the distance at which a manufacturer will generally demonstrate compliance with the RF exposure requirements set forth in RSS-102.
  20. 20 AP2 was considered an electrically small antenna.
  21. 21 AP1 was considered an electrically large antenna.
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