Mobile Phone Base-station Audit for Canford Heath Middle School

Russell Kent-Smith

Description

Mobile Telephone Base-station Radio Emission AuditAUDIT SITE : Canford Heath Middle SchoolLearoyd RoadPooleDorsetBH17 8PJThe Radiocommunications Agency (RA) is responsible for the management ofthe civil radio spectrum in the UK. The Government has asked the RA toimplement a national measurement programme to ensure that emissions fromcellular base stations do not exceed recommended guidelines.RA engineers measure the power density of transmissions in the various radiobands to be surveyed. The results, derived from electric field voltagemeasurements, are referenced to and presented alongside the relevantInternational Commission on Non-Ionizing Radiation Protection (ICNIRP)recommended public maximum exposure levels. On the left hand side of theresults page(s) is a graphical representation of the radio spectrum surveyed ateach location on the site. At the top of each graph a dotted green lineindicates the ICNIRP recommended exposure level for that frequency band.To the right hand side of each graph is a table showing the ten highest levelemissions recorded within a band. In addition to this report, results taken fromeach audit site will be posted on the RA website at www.radio.gov.uk wherefurther information on the audit can be found.Further explanation of the results and their context within ICNIRP guidelinescan be provided by the RA engineers at the time of the audit or by contactingthe RA on 020 7211 0211 or by e-mail at [e-mail] ...

Informations

• Publié par: Nethug
• Nombre de lectures: 58
• Langue: English

Extrait

Mobile Telephone Basestation Radio Emission Audit

AUDIT SITE :

Canford Heath Middle School Learoyd Road Poole Dorset BH17 8PJ

The Radiocommunications A 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 recommended 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 Ionizin 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 dotted green line indicates the ICNIRP recommended 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 atwww.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 [e-mail].

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 athttp://www.dfee.gov.uk/az/mobilephones.html.

Printed 19 Jul 2001

Pa

MEAV1.1

Report Summary

The Radiocommunications Agency performed this survey of the RF emission environment prevailing in the vicinity of Canford Heath Middle School on 19 July 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.

The following table, sorted in descending order of signal level, summarises the results obtained at each measurement location.

Summary of results:

Location

First floor  Room 15

Playground

Green Portakabin Classroom

Underneath Mast

Potakabin Classroom by new playground

Courtyard outside main entrance

Total Band Ex

0.00024781031423

0.00010079931269

9.5456907735E05

1.3701314952E05

1.2576908034E05

3.000140076E06

Issued on behalf of the Radiocommunications Agency

Issued by:

Andrew Cox Radiocommunications S

Printed 19 Jul 2001

Pa

Received by:

Relationship to ICNIRP Public Exposure Level

1/4035

1/9920

1/10475

1/72985

1/79510

1/333317

MEAV1.1

Rohde & Schwarz HE200.4050.3609.02 839891/005

Frequency Exposure Quotient 1.947E07 5.025E08 3.919E08 3.581E08 3.136E08 2.904E08 2.634E08 2.576E08 2.496E08 2.097E08 6.113E07

Frequency Exposure Quotient 7.320E11 4.212E11 3.845E11 3.671E11 3.272E11 2.850E11 2.722E11 2.424E11 2.065E11 2.016E11 5.053E10

ROHDE&SCHWARZ EB200 839.186/046,V02.504052.4654.

SZ 0186 9382

Canford Heath Middle School

Underneath Mast

NGR: Start Time: En

Site: Location:

945 950 Frequency (MHz)

19 Jul 2001 Andrew Cox

0.001

1E05

0.01

0.0001

1E06

930

923 927 Frequency (MHz)

1.370E05

MEAV1.1

Frequency Exposure Quotient 2.697E06 2.592E06 2.562E06 1.140E06 7.150E07 5.036E07 4.730E07 3.983E07 3.687E07 3.459E07 1.309E05

1E09

1E11

920

1E13 917

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 953.600 9.281E07 4.77 938.600 2.358E07 4.69 942.400 1.847E07 4.71 943.800 1.690E07 4.72 948.200 1.487E07 4.74 942.000 1.368E07 4.71 956.200 1.260E07 4.78 956.800 1.233E07 4.78 950.000 1.186E07 4.75 958.000 1.005E07 4.79 Band Exposure Quotient :

Receiver: Manufacturer: Model: Serial Number:

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 926.150 3.390E10 4.63 926.175 1.951E10 4.63 926.800 1.782E10 4.63 926.775 1.701E10 4.63 926.825 1.516E10 4.63 926.750 1.321E10 4.63 926.850 1.261E10 4.63 926.275 1.123E10 4.63 926.875 9.569E11 4.63 926.125 9.335E11 4.63 Band Exposure Quotient :

Antenna: Manufacturer: Model: Serial Number:

0.1

1

10

1E07

1E12 1808

1823

GSM 18081880 MHz

955

Printed 19 Jul 2001

Number of Frequencies Used in Quotient :

Pa

1866

1128

1837 1851 Frequency (MHz)

1E08

0.0001

1

0.01

1E10

1E06

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 1,860.600 2.509E05 9.30 1,866.000 2.418E05 9.33 1,856.200 2.378E05 9.28 1,853.000 1.056E05 9.27 1,848.000 6.607E06 9.24 1,863.000 4.691E06 9.31 1,868.400 4.419E06 9.34 1,859.400 3.703E06 9.30 1,871.800 3.450E06 9.36 1,857.000 3.212E06 9.29 Band Exposure Quotient :

1E12 935

940

ETACS 917933 MHz

GSM 935960 MHz

Taken from GPS 9:53:12

1E08

1E10

Total Band Exposure Quotient :

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 926.225 2.043E11 4.63 926.200 1.779E11 4.63 926.175 1.699E11 4.63 926.150 1.175E11 4.63 926.275 7.591E12 4.63 926.250 5.015E12 4.63 926.800 4.373E12 4.63 926.775 3.025E12 4.63 926.125 2.692E12 4.63 926.825 2.635E12 4.63 Band Exposure Quotient :

Frequency Exposure Quotient 2.941E05 2.759E05 2.107E05 1.051E05 5.329E06 4.656E06 3.224E07 2.907E07 2.524E07 1.580E07 1.007E04

MEAV1.1

1.008E04

Frequency Exposure Quotient 3.001E08 1.142E08 8.947E09 8.822E09 7.032E09 5.621E09 4.657E09 4.493E09 4.132E09 3.239E09 1.205E07

Frequency Exposure Quotient 4.411E12 3.842E12 3.669E12 2.538E12 1.639E12 1.083E12 9.437E13 6.529E13 5.814E13 5.687E13 6.311E11

ROHDE&SCHWARZ EB200 839.186/046,V02.504052.4654.

Rohde & Schwarz HE200.4050.3609.02 839891/005

923 927 Frequency (MHz)

930

SZ 0186 9382

Site: Location:

NGR: Start Time: En

Canford Heath Middle School Playground

0.001

19 Jul 2001 Andrew Cox

1E07

1E05

1E06

0.0001

1E11

0.01

Printed 19 Jul 2001

Number of Frequencies Used in Quotient :

1E12 935

GSM 18081880 MHz

955

945 950 Frequency (MHz)

0.01

1

1E12 1808

1823

1E06

0.0001

1E08

1E10

ETACS 917933 MHz

GSM 935960 MHz

1866

Pa

1837 1851 Frequency (MHz)

1128

1E08

Total Band Exposure Quotient :

1E10

940

Receiver: Manufacturer: Model: Serial Number:

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 1,856.200 2.730E04 9.28 1,860.600 2.567E04 9.30 1,866.000 1.966E04 9.33 1,862.200 9.787E05 9.31 1,871.800 4.987E05 9.36 1,855.200 4.319E05 9.28 1,856.000 2.992E06 9.28 1,865.800 2.712E06 9.33 1,863.000 2.351E06 9.31 1,856.400 1.467E06 9.28 Band Exposure Quotient :

Taken from GPS 10:16:02

1

10

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 950.000 1.426E07 4.75 950.400 5.425E08 4.75 958.000 4.285E08 4.79 946.800 4.176E08 4.73 949.600 3.339E08 4.75 954.600 2.683E08 4.77 951.400 2.215E08 4.76 941.200 2.114E08 4.71 947.800 1.958E08 4.74 955.600 1.547E08 4.78 Band Exposure Quotient :

Antenna: Manufacturer: Model: Serial Number:

0.1

920

1E09

1E13 917

1

0.1

10

Antenna: Manufacturer: Model: Serial Number:

1E13 917

1E11

1E09

Receiver: Manufacturer: Model: Serial Number:

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 950.000 1.528E07 4.75 958.000 1.076E07 4.79 946.800 7.427E08 4.73 936.400 6.462E08 4.68 955.600 4.165E08 4.78 953.200 2.932E08 4.77 950.400 2.423E08 4.75 954.600 1.693E08 4.77 947.000 8.730E09 4.74 957.600 7.106E09 4.79 Band Exposure Quotient :

920

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 1,856.200 4.531E04 9.28 1,866.000 2.155E04 9.33 1,860.600 1.095E04 9.30 1,855.200 3.511E05 9.28 1,862.200 2.634E05 9.31 1,871.800 2.558E05 9.36 1,856.000 6.109E06 9.28 1,856.400 2.994E06 9.28 1,859.400 1.580E06 9.30 1,860.400 1.546E06 9.30 Band Exposure Quotient :

Taken from GPS 10:38:32

Total Band Exposure Quotient :

GSM 935960 MHz

1E08

1E12 935

1E10

940

1E06

0.0001

923 927 Frequency (MHz)

930

ROHDE&SCHWARZ EB200 839.186/046,V02.504052.4654.

Frequency Exposure Quotient 4.215E12 4.023E12 3.424E12 2.424E12 2.264E12 2.160E12 1.970E12 1.494E12 1.011E12 9.437E13 6.831E11

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 926.800 1.953E11 4.63 926.175 1.863E11 4.63 926.225 1.586E11 4.63 926.150 1.122E11 4.63 926.825 1.049E11 4.63 926.200 1.000E11 4.63 926.250 9.125E12 4.63 926.125 6.920E12 4.63 926.275 4.680E12 4.63 926.775 4.373E12 4.63 Band Exposure Quotient :

Rohde & Schwarz HE200.4050.3609.02 839891/005

MEAV1.1

9.546E05

Frequency Exposure Quotient 4.882E05 2.310E05 1.177E05 3.785E06 2.829E06 2.733E06 6.583E07 3.226E07 1.699E07 1.662E07 9.533E05

Frequency Exposure Quotient 3.216E08 2.247E08 1.569E08 1.380E08 8.717E09 6.152E09 5.099E09 3.547E09 1.844E09 1.484E09 1.283E07

1128

1837 1851 Frequency (MHz)

ETACS 917933 MHz

1E10

1E08

Pa

1866

1

1E12 1808

1823

0.01

1E06

0.0001

GSM 18081880 MHz

955

Number of Frequencies Used in Quotient :

Printed 19 Jul 2001

NGR: Start Time: En

Site: Location:

0.01

0.001

19 Jul 2001 Andrew Cox

1E07

1E05

945 950 Frequency (MHz)

Green Portakabin Classroom

Canford Heath Middle School

SZ 0186 9382

1E11

0.0001

0.01

1E05

0.001

1E09

930

923 927 Frequency (MHz)

1E06

Site: Location:

Canford Heath Middle School

SZ 0186 9382

Potakabin Classroom by new playground

19 Jul 2001 Andrew Cox

NGR: Start Time: En

1.258E05

MEAV1.1

Frequency Exposure Quotient 4.882E06 2.436E06 2.403E06 1.235E06 7.212E07 4.402E07 6.434E08 3.579E08 2.622E08 2.517E08 1.252E05

Frequency Exposure Quotient 2.496E08 4.889E09 1.930E09 1.906E09 1.871E09 1.819E09 1.267E09 1.239E09 1.129E09 1.027E09 5.895E08

ROHDE&SCHWARZ EB200 839.186/046,V02.504052.4654.

Frequency Exposure Quotient 5.064E11 3.270E11 1.756E11 1.187E11 1.134E11 8.601E12 4.411E12 4.116E12 3.346E12 2.018E12 2.056E10

Rohde & Schwarz HE200.4050.3609.02 839891/005

1E13 917

1

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 950.000 1.186E07 4.75 953.600 2.331E08 4.77 946.800 9.137E09 4.73 955.200 9.103E09 4.78 958.600 8.966E09 4.79 954.600 8.682E09 4.77 941.800 5.968E09 4.71 942.200 5.837E09 4.71 941.200 5.311E09 4.71 957.600 4.916E09 4.79 Band Exposure Quotient :

0.1

Antenna: Manufacturer: Model: Serial Number:

10

1E07

920

Receiver: Manufacturer: Model: Serial Number:

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 1,856.200 4.531E05 9.28 1,871.800 2.280E05 9.36 1,860.600 2.236E05 9.30 1,862.200 1.150E05 9.31 1,855.200 6.690E06 9.28 1,866.000 4.107E06 9.33 1,856.000 5.970E07 9.28 1,866.200 3.339E07 9.33 1,856.400 2.434E07 9.28 1,860.800 2.342E07 9.30 Band Exposure Quotient :

Taken from GPS 11:01:38

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 926.175 2.345E10 4.63 926.150 1.514E10 4.63 926.225 8.133E11 4.63 926.250 5.499E11 4.63 926.200 5.250E11 4.63 926.275 3.984E11 4.63 926.300 2.043E11 4.63 926.100 1.906E11 4.63 926.125 1.549E11 4.63 926.825 9.350E12 4.63 Band Exposure Quotient :

1E10

1E06

1E12 1808

1E08

0.0001

0.01

1

1823

Printed 19 Jul 2001

Number of Frequencies Used in Quotient :

GSM 18081880 MHz

955

945 950 Frequency (MHz)

Total Band Exposure Quotient :

1E08

940

1E12 935

1E10

GSM 935960 MHz

ETACS 917933 MHz

1128

1837 1851 Frequency (MHz)

Pa

1866

Frequency Exposure Quotient 1.144E06 3.661E07 3.296E07 2.697E07 2.521E07 1.799E07 1.434E07 3.397E08 3.011E08 2.612E08 2.951E06

MEAV1.1

3.000E06

Frequency Exposure Quotient 1.024E08 9.453E09 4.049E09 3.174E09 2.961E09 2.287E09 1.646E09 1.412E09 1.181E09 1.076E09 4.888E08

Taken from GPS 11:30:14

Total Band Exposure Quotient :

1E08

1E10

940

GSM 935960 MHz

1128

ETACS 917933 MHz

1823

1

Pa

1866

1837 1851 Frequency (MHz)

1E10

1E08

1E06

1E12 1808

0.01

0.0001

Printed 19 Jul 2001

Number of Frequencies Used in Quotient :

955

GSM 18081880 MHz

1E12 935

945 950 Frequency (MHz)

Canford Heath Middle School

SZ 0186 9382

Courtyard outside main entrance

Site: Location:

NGR: Start Time: En

19 Jul 2001 Andrew Cox

0.001

1E05

0.01

1E06

0.0001

930

923 927 Frequency (MHz)

Rohde & Schwarz HE200.4050.3609.02 839891/005

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 926.175 2.571E11 4.63 926.150 1.319E11 4.63 926.200 1.289E11 4.63 926.225 1.072E11 4.63 926.825 1.002E11 4.63 926.800 9.137E12 4.63 926.775 7.957E12 4.63 926.275 6.314E12 4.63 926.850 5.381E12 4.63 926.750 4.475E12 4.63 Band Exposure Quotient :

Frequency Exposure Quotient 5.553E12 2.848E12 2.783E12 2.315E12 2.162E12 1.972E12 1.717E12 1.363E12 1.161E12 9.656E13 7.165E11

ROHDE&SCHWARZ EB200 839.186/046,V02.504052.4654.

1E07

1E13 917

920

1

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 955.600 4.893E08 4.78 946.800 4.475E08 4.73 950.000 1.923E08 4.75 958.000 1.521E08 4.79 957.600 1.418E08 4.79 953.600 1.090E08 4.77 948.200 7.802E09 4.74 954.600 6.739E09 4.77 940.800 5.556E09 4.70 958.600 5.159E09 4.79 Band Exposure Quotient :

1E09

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 1,856.200 1.062E05 9.28 1,866.000 3.416E06 9.33 1,855.200 3.058E06 9.28 1,860.600 2.509E06 9.30 1,862.200 2.348E06 9.31 1,849.200 1.663E06 9.25 1,871.800 1.342E06 9.36 1,861.200 3.162E07 9.31 1,856.600 2.795E07 9.28 1,872.600 2.446E07 9.36 Band Exposure Quotient :

1E11

Receiver: Manufacturer: Model: Serial Number:

Antenna: Manufacturer: Model: Serial Number:

10

0.1

Receiver: Manufacturer: Model: Serial Number:

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 926.225 6.922E11 4.63 926.175 6.921E11 4.63 926.200 5.131E11 4.63 926.125 4.899E11 4.63 926.150 3.237E11 4.63 926.250 2.756E11 4.63 926.275 1.951E11 4.63 926.775 7.257E12 4.63 926.825 6.774E12 4.63 926.300 6.030E12 4.63 Band Exposure Quotient :

GSM 935960 MHz

Pa

1866

1837 1851 Frequency (MHz)

ETACS 917933 MHz

1128

Total Band Exposure Quotient :

1E08

1E10

940

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 1,856.200 1.165E03 9.28 1,860.600 4.565E04 9.30 1,866.000 4.400E04 9.33 1,862.200 1.025E04 9.31 1,855.200 5.564E05 9.28 1,871.800 2.558E05 9.36 1,856.000 1.466E05 9.28 1,856.400 7.019E06 9.28 1,860.400 4.358E06 9.30 1,863.000 2.762E06 9.31 Band Exposure Quotient :

Taken from GPS 12:55:21

1

10

Frequency Maximum ICNIRP (MHz) Exposure Limit (W/m²) (W/m²) 946.800 1.261E06 4.73 950.000 1.186E06 4.75 958.000 7.621E07 4.79 955.600 5.365E07 4.78 936.400 1.821E07 4.68 954.600 1.441E07 4.77 953.200 8.264E08 4.77 957.600 7.106E08 4.79 954.200 5.600E08 4.77 940.800 2.984E08 4.70 Band Exposure Quotient :

0.1

Antenna: Manufacturer: Model: Serial Number:

1E13 917

1E09

920

923 927 Frequency (MHz)

930

0.001

19 Jul 2001 Andrew Cox

1E07

1E05

1E06

0.0001

1E11

0.01

Canford Heath Middle School

SZ 0186 9382

Site: Location:

NGR: Start Time: En

First floor  Room 15

945 950 Frequency (MHz)

Printed 19 Jul 2001

Number of Frequencies Used in Quotient :

1E12 935

GSM 18081880 MHz

955

1823

1E12 1808

0.01

1

1E06

0.0001

1E08

1E10

MEAV1.1

2.478E04

Frequency Exposure Quotient 1.255E04 4.907E05 4.716E05 1.101E05 5.998E06 2.733E06 1.579E06 7.562E07 4.685E07 2.965E07 2.468E04

Frequency Exposure Quotient 2.664E07 2.496E07 1.591E07 1.123E07 3.890E08 3.019E08 1.734E08 1.484E08 1.174E08 6.344E09 9.739E07

Frequency Exposure Quotient 1.495E11 1.495E11 1.108E11 1.058E11 6.990E12 5.950E12 4.213E12 1.566E12 1.462E12 1.302E12 1.274E10

ROHDE&SCHWARZ EB200 839.186/046,V02.504052.4654.

Rohde & Schwarz HE200.4050.3609.02 839891/005

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( m 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 Less than 400MHz 400MHz to 2GHz 2GHz to 300GHz

ICNIRP Limit 2W/m² (f / 200)W/m², where f is frequency in MHz 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).

GSM: ETACS: TETRA: 3G:

Global System for Mobile communication Extended Total Access Communications System Terrestrial Trunked Radio Third Generation mobile phone services

1.000E06 1.000E09 1.000E12

Exponential (or scientific) number format. Equal to one millionth Equal to one thousand millionth Equal to one million millionth.

Printed 19 Jul 2001

Pa

MEAV1.1