RES535 – 336 – DESCRIPTION 3 Specification of input data for a requirement The fields needed for a given requirement and their specifications are: – frequency in kHz, up to 5-digit integer; – start time, as 4-digit integer; – stop time, as 4-digit integer; – target service area, as a set of up to 12 CIRAF zones and quadrants up to a maximum of 30 characters; – site code, a 3-character code from a list of codes, or a site name and its geographic coordinates; – power in kW, up to 4-digit integer; – azimuth of maximum radiation; – slew angle, up to 2-digit integer representing the difference between the azimuth of maximum radiation and the direction of unslewed radiation; – antenna code, up to 3-digit integer from a list of values, or a full antenna description, as given in Recommendation ITU-R BS.705; – days of operation; – start date, in the case that the requirement starts after the start of the schedule; – stop date, in the case that the requirement stops before the end of the schedule; – modulation choice, to specify if the requirement is to use DSB, single-side band (SSB) (see Recommendation ITU-R BS.640) or digital emission (see Recommendation ITU-R BS.1514). This field may be used to identify any other type of modulation when this has been defined for use by HFBC in an ITU-R Recommendation; – administration code; – broadcasting organization code; – identification number; – identification of synchronization with other requirements.