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The Wireless Telegraphy (White Space Devices) (Exemption) Regulations 2015

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Master device requirements

6.—(1) A master device must—

(a)have a geo-location capability; and

(b)only transmit within the frequency band 470 MHz to 790 MHZ—

(i)after requesting and receiving master operational parameters from a database;

(ii)in accordance with the limitations specified in the master operational parameters it has received from that database; and

(iii)on the specific frequencies and within the specific power limits specified in the channel usage parameters which the master device has communicated to that database.

(2) If a master device operates simultaneously on more than one DTT channel and if indicated by the master operational parameters, a master device must also apply a simultaneous operation power restriction.

(3) When requesting master operational parameters from a database, a master device must communicate to that database the following information (“master device characteristics”)—

(a)information specifying that it is a master device;

(b)the master device’s unique identifier;

(c)information specifying that the master device is Type A equipment or Type B equipment;

(d)the location of the master device expressed as the latitude and longitude coordinates of the location of its antenna; and

(e)the geo-location uncertainty of its antenna.

(4) After receiving master operational parameters from a database, a master device must communicate its channel usage parameters to that database.

(5) After receiving master operational parameters from a database, a master device must communicate with that database every update period for confirmation that those parameters remain valid.

(6) Master operational parameters cease to be valid if—

(a)a database communicates an instruction to the master device that those master operational parameters are not valid; or

(b)the master device has not received confirmation from a database that those master operational parameters are still valid by the end of an update period.

(7) If its master operational parameters are no longer valid, a master device must—

(a)communicate an instruction to all slave devices to which that master device has communicated slave operational parameters to cease transmitting on the basis of those slave operational parameters; and

(b)thereafter itself cease transmitting on the basis of those master operational parameters.

(8) “Simultaneous operation power restriction” means a restriction on total maximum EIRP across all of the DTT channels on which a device transmits simultaneously to no greater than the lowest permitted maximum EIRP for any of those DTT channels.

(9) “Update period” means the time period (in seconds) specified by a database as part of the master operational parameters.

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