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Mobile Phone Base-station Audit for Brynglas Primary School

De
9 pages
Mobile Telephone Base-StationRadio Emission AuditAudit site: Brynglas Primary SchoolBrynglas DriveNewportNP20 5QSThe Radiocommunications Agency (RA) is responsible for the management of thecivil radio spectrum in the UK. The Government has asked the RA to implement anational measurement programme to ensure that emissions from cellular basestations do not exceed guidelines.RA engineers measure the power density of transmissions in the various radio bandsto be surveyed. The results, derived from electric field voltage measurements, arereferenced to and presented alongside the relevant International Commission onNon-Ionizing Radiation Protection (ICNIRP) recommended public maximum exposurelevels. On the left hand side of the results page(s) is a graphical representation ofthe radio spectrum surveyed at each location on the site. At the top of each graph agreen line indicates the ICNIRP guideline exposure level for that frequency band. Tothe right hand side of each graph is a table showing the ten highest level emissionsrecorded within a band. In addition to this report, results taken from each audit sitewill be posted on the RA website at www.radio.gov.uk where further information onthe audit can be found.Further explanation of the results and their context within ICNIRP guidelines can beprovided by the RA engineers at the time of the audit or by contacting the RA on(020) 7211 0211 or by e-mail at rfaudit@ra.gsi.gov.uk.The DfEE have issued advice ...
Voir plus Voir moins
Mobile Telephone Base-Station
Radio Emission Audit
Audit site:
The Radiocommunications Agency (RA) is responsible for the management of the
civil radio spectrum in the UK.
The Government has asked the RA to implement
a
national measurement programme to ensure that emissions from cellular base
stations do not exceed guidelines.
RA engineers measure the power density of transmissions in the various radio bands
to be surveyed. The results, derived from electric field voltage measurements, are
referenced to and presented alongside the relevant International Commission on
Non-Ionizing Radiation Protection (ICNIRP) recommended public maximum exposure
levels.
On the left hand side of the results page(s) is a graphical representation of
the radio spectrum surveyed at each location on the site.
At the top of each graph a
green line indicates the ICNIRP guideline exposure level for that frequency band. To
the right hand side of each graph is a table showing the ten highest level emissions
recorded within a band. In addition to this report, results taken from each audit site
will be posted on the RA website at www.radio.gov.uk where further information on
the audit can be found.
Further explanation of the results and their context within ICNIRP guidelines can be
provided by the RA engineers at the time of the audit or by contacting the RA on
(020) 7211 0211 or by e-mail at rfaudit@ra.gsi.gov.uk.
The DfEE have issued advice and information about base stations to local education
authorities and schools in the DfEE’s ‘Spectrum’ publication.
Further information and
contact points can also be found on the DfEE website at www.dfee.gov.uk/a-
z/mobilephones.html.
Brynglas Primary School
Brynglas Drive
Newport
NP20 5QS
Page 1 of 9
21 Dec 2001
Printed:
MEA-V1.1.2
Report Summary
The Radiocommunications Agency performed this survey of the RF emission
environment prevailing in the vicinity of Brynglas Primary School on 21 December
2001.
As the radio spectrum is continually changing, these measurements can only
provide information on the RF conditions for the specific location(s) at the time of
the survey.
Issued on behalf of the Radiocommunications Agency
Peter Alsop
Radiocommunications Specialist
Mr M Tracey
Caretaker
The following table, sorted in descending order of signal level, summarises the
results obtained at each measurement location.
Issued by:
Received by:
Summary of results:
Total Band
Exposure Quotient
Location
Relationship to
ICNIRP Public
Exposure Level
0.00013889277725
Centre of playground.
1/7199
3.1788220625E-05
Centre of classroom 6.
1/31458
2.8059827326E-05
Vehicle entrance.
1/35638
1.9409913464E-05
Centre of main hall.
1/51520
1.9237742303E-05
Centre of classroom 2.
1/51981
1.6974419885E-05
Centre of prefab hallway.
1/58912
Page 2 of 9
21 Dec 2001
Printed:
MEA-V1.1.2
NGR:
ST 3084 9025
Manufacturer:
Rohde & Schwarz
Serial Number:
836287/009
Model:
HE200.4050.3609.02
Location:
Vehicle entrance.
Start Time:
21 December 2001
9:41:31
Officer:
Peter Alsop
Site:
Brynglas Primary School
Serial Number:
836.378/014,V02.31-4052.4654.
Taken from GPS
Manufacturer:
ROHDE&SCHWARZ
Receiver:
Model:
EB200
Antenna:
ETACS 917
-933 MHz
1E-13
1E-11
1E-09
1E-07
1E-05
0.001
0.1
10
917
920
923
927
930
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
925.600
1.411E-11
4.63
3.049E-12
925.625
1.379E-11
4.63
2.980E-12
925.550
9.762E-12
4.63
2.110E-12
925.575
8.701E-12
4.63
1.880E-12
926.025
8.512E-12
4.63
1.838E-12
926.000
8.128E-12
4.63
1.756E-12
925.675
6.913E-12
4.63
1.494E-12
925.650
6.602E-12
4.63
1.426E-12
925.975
5.754E-12
4.63
1.243E-12
926.050
5.249E-12
4.63
1.134E-12
Band Exposure Quotient :
7.405E-11
GSM 935-960 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
935
940
945
950
955
Frequency (MHz)
Ex
posure (
W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
953.200
2.932E-07
4.77
6.152E-08
939.600
1.491E-07
4.70
3.175E-08
949.000
8.185E-08
4.75
1.725E-08
958.200
8.170E-08
4.79
1.705E-08
952.200
7.695E-08
4.76
1.616E-08
950.000
5.297E-08
4.75
1.115E-08
959.200
4.822E-08
4.80
1.005E-08
942.600
4.136E-08
4.71
8.776E-09
938.600
4.098E-08
4.69
8.733E-09
957.000
3.639E-08
4.79
7.605E-09
Band Exposure Quotient :
2.884E-07
GSM 1808-1880 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
1808
1823
1837
1851
1866
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
1,859.400
4.556E-05
9.30
4.900E-06
1,858.600
4.246E-05
9.29
4.569E-06
1,852.800
3.746E-05
9.26
4.044E-06
1,869.400
3.682E-05
9.35
3.939E-06
1,860.400
3.625E-05
9.30
3.897E-06
1,851.200
3.487E-05
9.26
3.767E-06
1,851.600
2.836E-06
9.26
3.063E-07
1,867.800
2.660E-06
9.34
2.848E-07
1,856.600
1.805E-06
9.28
1.944E-07
1,847.000
1.735E-06
9.23
1.879E-07
Band Exposure Quotient :
2.777E-05
Total Band Exposure Quotient :
2.806E-05
Number of Frequencies Used in Quotient :
1128
Page 3 of 9
21 Dec 2001
Printed:
MEA-V1.1.2
NGR:
ST 3084 9025
Manufacturer:
Rohde & Schwarz
Serial Number:
836287/009
Model:
HE200.4050.3609.02
Location:
Centre of playground.
Start Time:
21 December 2001
10:03:58
Officer:
Peter Alsop
Site:
Brynglas Primary School
Serial Number:
836.378/014,V02.31-4052.4654.
Taken from GPS
Manufacturer:
ROHDE&SCHWARZ
Receiver:
Model:
EB200
Antenna:
ETACS 917
-933 MHz
1E-13
1E-11
1E-09
1E-07
1E-05
0.001
0.1
10
917
920
923
927
930
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
925.575
2.186E-11
4.63
4.723E-12
925.225
1.946E-11
4.63
4.207E-12
925.200
1.902E-11
4.63
4.111E-12
925.625
1.777E-11
4.63
3.839E-12
926.625
1.662E-11
4.63
3.587E-12
926.575
1.587E-11
4.63
3.426E-12
925.175
1.582E-11
4.63
3.420E-12
925.600
1.478E-11
4.63
3.193E-12
925.250
1.316E-11
4.63
2.845E-12
926.600
1.098E-11
4.63
2.370E-12
Band Exposure Quotient :
1.022E-10
GSM 935-960 MHz
1E-11
1E-09
1E-07
1E-05
0.001
0.1
10
935
940
945
950
955
Frequency (MHz)
Ex
posure (
W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
938.600
8.177E-06
4.69
1.742E-06
953.200
7.537E-06
4.77
1.581E-06
939.600
6.976E-06
4.70
1.485E-06
952.200
5.704E-06
4.76
1.198E-06
949.000
2.773E-06
4.75
5.845E-07
950.000
2.014E-06
4.75
4.239E-07
954.600
1.814E-06
4.77
3.800E-07
950.800
2.370E-07
4.75
4.986E-08
949.200
1.359E-07
4.75
2.863E-08
938.400
1.237E-07
4.69
2.637E-08
Band Exposure Quotient :
7.747E-06
GSM 1808-1880 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
1808
1823
1837
1851
1866
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
1,859.400
1.899E-04
9.30
2.043E-05
1,858.600
1.853E-04
9.29
1.994E-05
1,865.800
1.184E-04
9.33
1.269E-05
1,861.800
1.001E-04
9.31
1.075E-05
1,852.800
9.629E-05
9.26
1.039E-05
1,864.200
9.165E-05
9.32
9.833E-06
1,869.400
7.692E-05
9.35
8.230E-06
1,860.400
7.068E-05
9.30
7.598E-06
1,857.600
6.874E-05
9.29
7.401E-06
1,853.200
4.206E-05
9.27
4.539E-06
Band Exposure Quotient :
1.311E-04
Total Band Exposure Quotient :
1.389E-04
Number of Frequencies Used in Quotient :
1128
Page 4 of 9
21 Dec 2001
Printed:
MEA-V1.1.2
NGR:
ST 3084 9025
Manufacturer:
Rohde & Schwarz
Serial Number:
836287/009
Model:
HE200.4050.3609.02
Location:
Centre of prefab hallway.
Start Time:
21 December 2001
10:28:52
Officer:
Peter Alsop
Site:
Brynglas Primary School
Serial Number:
836.378/014,V02.31-4052.4654.
Manufacturer:
ROHDE&SCHWARZ
Receiver:
Model:
EB200
Antenna:
ETACS 917
-933 MHz
1E-13
1E-11
1E-09
1E-07
1E-05
0.001
0.1
10
917
920
923
927
930
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
926.325
1.480E-11
4.63
3.196E-12
926.625
4.272E-12
4.63
9.220E-13
926.125
3.982E-12
4.63
8.600E-13
926.575
3.720E-12
4.63
8.030E-13
926.000
2.951E-12
4.63
6.374E-13
925.225
2.687E-12
4.63
5.808E-13
925.200
2.687E-12
4.63
5.808E-13
926.600
2.402E-12
4.63
5.185E-13
925.150
2.394E-12
4.63
5.176E-13
925.175
2.287E-12
4.63
4.943E-13
Band Exposure Quotient :
5.711E-11
GSM 935-960 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
935
940
945
950
955
Frequency (MHz)
Ex
posure (
W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
953.200
2.800E-06
4.77
5.876E-07
949.000
1.791E-06
4.75
3.774E-07
939.600
1.131E-06
4.70
2.408E-07
952.200
1.014E-06
4.76
2.131E-07
938.600
7.288E-07
4.69
1.553E-07
950.000
4.613E-07
4.75
9.712E-08
954.600
3.378E-07
4.77
7.076E-08
950.800
2.984E-08
4.75
6.277E-09
935.200
2.749E-08
4.68
5.879E-09
953.400
2.738E-08
4.77
5.743E-09
Band Exposure Quotient :
1.800E-06
GSM 1808-1880 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
1808
1823
1837
1851
1866
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
1,847.000
1.619E-05
9.23
1.753E-06
1,848.000
1.479E-05
9.24
1.601E-06
1,862.800
1.416E-05
9.31
1.520E-06
1,851.200
1.326E-05
9.26
1.432E-06
1,867.800
1.244E-05
9.34
1.332E-06
1,856.600
1.063E-05
9.28
1.145E-06
1,858.600
9.077E-06
9.29
9.768E-07
1,851.600
8.764E-06
9.26
9.466E-07
1,852.800
7.649E-06
9.26
8.257E-07
1,859.400
6.738E-06
9.30
7.248E-07
Band Exposure Quotient :
1.517E-05
Total Band Exposure Quotient :
1.697E-05
Number of Frequencies Used in Quotient :
1128
Page 5 of 9
21 Dec 2001
Printed:
MEA-V1.1.2
NGR:
ST 3084 9025
Manufacturer:
Rohde & Schwarz
Serial Number:
836287/009
Model:
HE200.4050.3609.02
Location:
Centre of main hall.
Start Time:
21 December 2001
10:51:21
Officer:
Peter Alsop
Site:
Brynglas Primary School
Serial Number:
836.378/014,V02.31-4052.4654.
Manufacturer:
ROHDE&SCHWARZ
Receiver:
Model:
EB200
Antenna:
ETACS 917
-933 MHz
1E-13
1E-11
1E-09
1E-07
1E-05
0.001
0.1
10
917
920
923
927
930
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
925.600
9.991E-12
4.63
2.159E-12
925.625
7.238E-12
4.63
1.564E-12
925.825
6.163E-12
4.63
1.331E-12
925.650
6.161E-12
4.63
1.331E-12
925.575
6.020E-12
4.63
1.301E-12
925.550
5.490E-12
4.63
1.186E-12
925.850
4.896E-12
4.63
1.058E-12
925.775
4.363E-12
4.63
9.425E-13
925.750
4.071E-12
4.63
8.796E-13
925.800
2.883E-12
4.63
6.227E-13
Band Exposure Quotient :
6.279E-11
GSM 935-960 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
935
940
945
950
955
Frequency (MHz)
Ex
posure (
W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
938.600
7.122E-08
4.69
1.518E-08
939.600
6.510E-08
4.70
1.386E-08
949.000
4.498E-08
4.75
9.479E-09
953.200
3.525E-08
4.77
7.397E-09
952.200
3.135E-08
4.76
6.584E-09
950.000
2.911E-08
4.75
6.128E-09
944.200
1.691E-08
4.72
3.582E-09
948.800
1.267E-08
4.74
2.671E-09
958.600
1.182E-08
4.79
2.466E-09
954.600
1.118E-08
4.77
2.343E-09
Band Exposure Quotient :
1.041E-07
GSM 1808-1880 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
1808
1823
1837
1851
1866
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
1,859.400
3.080E-05
9.30
3.313E-06
1,869.400
2.924E-05
9.35
3.129E-06
1,851.200
2.585E-05
9.26
2.792E-06
1,858.600
2.280E-05
9.29
2.454E-06
1,860.400
1.477E-05
9.30
1.588E-06
1,852.800
1.329E-05
9.26
1.435E-06
1,867.800
8.607E-06
9.34
9.216E-07
1,862.800
6.473E-06
9.31
6.950E-07
1,848.000
4.677E-06
9.24
5.062E-07
1,856.600
3.859E-06
9.28
4.157E-07
Band Exposure Quotient :
1.931E-05
Total Band Exposure Quotient :
1.941E-05
Number of Frequencies Used in Quotient :
1128
Page 6 of 9
21 Dec 2001
Printed:
MEA-V1.1.2
NGR:
ST 3084 9025
Manufacturer:
Rohde & Schwarz
Serial Number:
836287/009
Model:
HE200.4050.3609.02
Location:
Centre of classroom 2.
Start Time:
21 December 2001
11:11:37
Officer:
Peter Alsop
Site:
Brynglas Primary School
Serial Number:
836.378/014,V02.31-4052.4654.
Manufacturer:
ROHDE&SCHWARZ
Receiver:
Model:
EB200
Antenna:
ETACS 917
-933 MHz
1E-13
1E-11
1E-09
1E-07
1E-05
0.001
0.1
10
917
920
923
927
930
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
925.600
1.860E-11
4.63
4.020E-12
925.625
1.258E-11
4.63
2.718E-12
925.575
9.323E-12
4.63
2.015E-12
925.650
6.602E-12
4.63
1.426E-12
925.550
2.628E-12
4.63
5.678E-13
925.225
2.340E-12
4.63
5.058E-13
925.675
2.088E-12
4.63
4.511E-13
925.525
1.993E-12
4.63
4.307E-13
925.150
1.858E-12
4.63
4.018E-13
925.200
1.657E-12
4.63
3.581E-13
Band Exposure Quotient :
5.747E-11
GSM 935-960 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
935
940
945
950
955
Frequency (MHz)
Ex
posure (
W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
953.200
6.126E-07
4.77
1.285E-07
952.200
4.038E-07
4.76
8.482E-08
949.000
2.773E-07
4.75
5.845E-08
938.600
1.454E-07
4.69
3.098E-08
950.000
1.213E-07
4.75
2.555E-08
939.600
1.131E-07
4.70
2.408E-08
954.600
8.682E-08
4.77
1.819E-08
948.800
1.327E-08
4.74
2.797E-09
950.800
9.436E-09
4.75
1.985E-09
935.200
9.103E-09
4.68
1.947E-09
Band Exposure Quotient :
4.002E-07
GSM 1808-1880 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
1808
1823
1837
1851
1866
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
1,869.400
4.227E-05
9.35
4.522E-06
1,858.600
2.333E-05
9.29
2.511E-06
1,859.400
2.180E-05
9.30
2.345E-06
1,860.400
2.135E-05
9.30
2.295E-06
1,852.800
1.424E-05
9.26
1.537E-06
1,851.200
1.209E-05
9.26
1.306E-06
1,847.000
1.045E-05
9.23
1.132E-06
1,867.800
6.681E-06
9.34
7.154E-07
1,848.000
3.715E-06
9.24
4.021E-07
1,851.600
3.410E-06
9.26
3.683E-07
Band Exposure Quotient :
1.884E-05
Total Band Exposure Quotient :
1.924E-05
Number of Frequencies Used in Quotient :
1128
Page 7 of 9
21 Dec 2001
Printed:
MEA-V1.1.2
NGR:
ST 3084 9025
Manufacturer:
Rohde & Schwarz
Serial Number:
836287/009
Model:
HE200.4050.3609.02
Location:
Centre of classroom 6.
Start Time:
21 December 2001
11:32:45
Officer:
Peter Alsop
Site:
Brynglas Primary School
Serial Number:
836.378/014,V02.31-4052.4654.
Manufacturer:
ROHDE&SCHWARZ
Receiver:
Model:
EB200
Antenna:
ETACS 917
-933 MHz
1E-13
1E-11
1E-09
1E-07
1E-05
0.001
0.1
10
917
920
923
927
930
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
926.000
2.188E-11
4.63
4.725E-12
926.025
1.862E-11
4.63
4.022E-12
925.975
1.862E-11
4.63
4.022E-12
925.950
1.148E-11
4.63
2.480E-12
926.050
1.122E-11
4.63
2.424E-12
925.200
1.120E-11
4.63
2.421E-12
925.175
1.094E-11
4.63
2.366E-12
926.625
9.133E-12
4.63
1.971E-12
926.600
9.133E-12
4.63
1.971E-12
925.425
9.108E-12
4.63
1.968E-12
Band Exposure Quotient :
1.073E-10
GSM 935-960 MHz
1E-11
1E-09
1E-07
1E-05
0.001
0.1
10
935
940
945
950
955
Frequency (MHz)
Ex
posure (
W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
938.600
9.607E-07
4.69
2.047E-07
939.600
7.827E-07
4.70
1.666E-07
952.200
2.607E-07
4.76
5.476E-08
953.200
1.649E-07
4.77
3.460E-08
954.600
9.519E-08
4.77
1.994E-08
950.000
5.675E-08
4.75
1.195E-08
941.800
2.666E-08
4.71
5.661E-09
936.600
2.458E-08
4.68
5.249E-09
938.400
2.053E-08
4.69
4.376E-09
955.200
2.038E-08
4.78
4.267E-09
Band Exposure Quotient :
5.875E-07
GSM 1808-1880 MHz
1E-12
1E-10
1E-08
1E-06
0.0001
0.01
1
1808
1823
1837
1851
1866
Frequency (MHz)
Ex
posure (W/m²)
Frequency
(MHz)
Maximum
Exposure
(W/m²)
ICNIRP
Limit
(W/m²)
Frequency
Exposure
Quotient
1,859.400
5.869E-05
9.30
6.313E-06
1,860.400
5.745E-05
9.30
6.176E-06
1,858.600
4.246E-05
9.29
4.569E-06
1,869.400
3.945E-05
9.35
4.221E-06
1,852.800
3.189E-05
9.26
3.442E-06
1,851.200
2.526E-05
9.26
2.729E-06
1,861.800
6.030E-06
9.31
6.478E-07
1,864.200
5.523E-06
9.32
5.925E-07
1,867.800
3.198E-06
9.34
3.424E-07
1,865.800
2.590E-06
9.33
2.777E-07
Band Exposure Quotient :
3.120E-05
Total Band Exposure Quotient :
3.179E-05
Number of Frequencies Used in Quotient :
1128
Page 8 of 9
21 Dec 2001
Printed:
MEA-V1.1.2
Glossary
Location
:
The point at which the readings are taken. Each location is uniquely identified by its NGR coordinates and its timestamp. A
description of the location should be sufficient to allow the position to be identified at a later date.
NGR
:
The coordinates of the location. In this survey they must be specified using a 100km tile identifier followed by a 4-digit
easting and northing as defined in the Ordnance Survey National Grid Reference (NGR) system. N.B. This gives the
position of a location to 10 metre precision. E.g. TQ 3056 2184
Start Time
:
The date and time at which the receiver started taking its measurements at a location.
Antenna
:
The antenna device connected to the receiver. This is known by its serial number, type and manufacturer, and has an
associated calibration (see definition).
Calibration
:
A set of frequency (Hz) and K-factor (dB) pairs that define the gain characteristics of the antenna. Linear interpolation is
used to obtain K-factor values for intermediate frequencies.
Sweep Band
:
The measurements are taken at regular frequency intervals within a band of frequencies. A sweep band is defined by the
band title (which appears on each graph), start frequency, end frequency, frequency step, bandwidth and dwell time.
Exposure
:
This is the name given to the measured results. The maximum electric field strength values in decibel microvolts per metre
(dB(
μ
V/m)) are converted to power density in watts per square metre (
W/m²).
Table Data
:
The 'Maximum Exposure' column consists of the ten highest exposure values in a band. Accompanying them are the
frequency at which the they occurred, the ICNIRP limit at that frequency (see definition), and the frequency exposure
quotient (see definition).
ICNIRP
:
International Commission for Non-Ionizing Radiation Protection
ICNIRP Limit
:
This is a guideline for the maximum permitted power density of non-ionizing radiation for public exposure.
The guideline is frequency dependent and is currently defined as:
Frequency
ICNIRP Limit
Less than 400MHz
2W/m²
400MHz to 2GHz
(f / 200)
W/m², where f is frequency in MHz
2GHz to 300GHz
10
W/m²
Frequency Exposure Quotient
:
This is the ratio of the measured maximum electromagnetic power density to the ICNIRP limit at a given frequency. A value
close to 1 signifies that exposure levels could be near to the maximum permitted at that frequency.
Band Exposure Quotient
:
The sum of all the frequency exposure quotients in a band at a single location.
Total Band Exposure Quotient
:
The sum of all the frequency exposure quotients in all bands at a single location.
Power Density:
The energy flowing from an antenna through a unit area normal to the direction of propagation in a unit time. This is
measured in watts per square metre (
W/m²).
G
S
M
:
Global System for Mobile communication
ETACS:
Extended Total Access Communications System
TETRA:
Terrestrial Trunked Radio
3G:
Third Generation mobile phone services
1.000E-06
Exponential (or scientific) number format. Equal to one millionth
1.000E-09
Equal to one thousand millionth
1.000E-12
Equal to one million millionth.
Page 9 of 9
21 Dec 2001
Printed:
MEA-V1.1.2