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The Wireless Telegraphy (Testing and Development Under Suppressed Radiation Conditions) (Exemption) Regulations 1989

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Regulation 5

SCHEDULETERMS, PROVISIONS AND LIMITATIONS OF EXEMPTION

1.  Use of relevant stations and relevant apparatus for emission shall be limited to use –

(a)on a frequency within a frequency band specified in table 1 below; and

(b)where the maximum field strength of the emission does not exceed the limit specified in relation to that frequency band when measured at the distance specified in relation thereto.

TABLE 1

Frequency Band (MHz)Limit for maximum field strength (dBμ V/m)Distance at which measurement taken (m)
0.150 – 0.283534100
0.5265 – 1.60534100
1.605 – 2.173548100
2.1905 – 3.95048100
22.00 – 29.99934100
30.00 – 70.503030
71.50 – 74.603030
75.40 – 80.003030
84.00 – 108.003030
137.00 – 143.003030
144.00 – 146.003030
148.00 – 153.003030
156.8375 – 225.003030
400.00 – 405.503030
406.50 – 450.003030
453.00 – 464.003030
467.00 – 960.003030

2.  Relevant stations and relevant apparatus shall not radiate, in any frequency band, spurious emissions of a maximum field strength in excess of the limit, when measured at the distance specified in table 2 below in relation to each frequency band –

TABLE 2

Frequency Band (MHz)Limit for maximum field strength (dBμ V/m)Distance at which measurement taken (m)
below 3023100
30 and above2330

3.  In paragraphs 1 and 2 above –

“distance” means the distance from the relevant station or relevant apparatus; and

“measured” means ascertained by making measurements of all components of the emission from such number of directions in –

(a)

in a horizontal plane; or

(b)

where the configuration of the site is such that it is not reasonably practicable to make measurements in an exactly horizontal plane, in a plane which is as near to horizontal as reasonably practicable, including at least four –

(i)

orthogonal directions; or

(ii)

where the configuration of the site is such that it is not reasonably practicable to make measurements from exactly orthogonal directions, directions which are as near to orthogonal as reasonably practicable,

as is reasonably necessary to determine the maximum field strength of the emission at the distance specified, and the highest value obtained shall be taken to be the maximum field strength.

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