# The Wireless Telegraphy (Exemption) Regulations 1999, Paragraph 2: Telemetry and Telecommand: General Wireless telegraphy apparatus designed or adapted for– (a) Telemetry and Telecommand, so as to be capable of use on one or more of the frequencies or within one of the frequency bands, and at a radiated level not exceeding the maximum for such frequencies or frequency bands, for each category of apparatus, specified in the table below and subject to the following sub-paragraphs; (b) in category iii, channel numbers 1 and 3 to 11 are available with a channel centre frequency of 173.2 MHz + (channel bandwidth × channel number); (c) in category iv, channel numbers 1 to 5 are available with a channel centre frequency of 173.2 MHz + (channel bandwidth × channel number); (d) in category v, Telemetry and Telecommand may only be used in conjunction with telephony with a non-locking push to talk key or voice operated carrier; (e) in category vii, the band may also be used for airborne telemetry based on 25 kHz channel spacing; (f) in categories viii, ix and xii, consecutive channels may be combined for increased bandwidth up to the maximum sub-band frequency allocation. The total signal bandwidth must be contained within the allocated sub-band– Category Frequencies or frequency band Radiated level Channel bandwidth Music or speech permitted Duty cycle ETSI standard i 26.995, 27.045, 27.095, 27.145, 27.195 MHz 1 mW erp 10 kHz No — EN 300 220–1 ii 40.66–40.7 MHz 10 mW erp — No — iii 173.2–173.35 MHz 1 mW erp 12.5 kHz No iv 173.2–173.35 MHz 1 mW erp 25 kHz No — v 173.5875, 173.6 MHz 10 mW erp 12.5 kHz Yes — vi 417.9–418.1 MHz 250 μW erp — No — vii 433.05–434.79 MHz 10 mW erp — No ≤ 10% viii 868–868.6 MHz 25 mW erp ≤ 25 kHz No ≤ 1% ix 868.7–869.2 MHz 25 mW erp ≤ 25 kHz No ≤ 0.1% x 869.3–869.4 MHz 10 mW erp ≤ 25 kHz No ≤ 10% xi 869.4–869.65 MHz 500 mW erp ≤ 25 kHz No ≤ 10% xii 869.7–870 MHz 5 mW erp ≤ 25 kHz No up to 100 % xiii 2400–2483.5 MHz 10 mW eirp ≤ 20 MHz Yes — I-ETS 300 440 --- Source: https://www.legislation.gov.uk/uksi/1999/930/schedule/6/part/III/paragraph/2 (the official version) Page: https://openlegislation.uk/wireless-telegraphy-exemption-regulations-1999/schedule-6/part-III/paragraph-2 Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.