For the purposes of this Recommendation the duty cycle is defined as the ratio, expressed as a percentage, of Σ(Ton)/(Tobs) where Ton is the 'on' time of a single transmitter device and Tobs is the observation period. Ton is measured in an observation frequency band (Fobs). Unless otherwise specified in the relevant Annex, Tobs is a continuous one hour period and Fobs is the applicable frequency band in the Annex of this Recommendation. For pre-programmed devices the maximum transmitter 'on' time limits are given in Table 20. These limits are advisory with a view to facilitating sharing between systems in the same frequency band.
|Name||Transmitting time / Full cycle||Maximum transmitter "on" time (seconds)||Maximum transmitter "off" time (seconds)||Explanation|
|Very Low||≤0.1%||0.72||-||For example, 5 transmissions of 0.72 seconds within one hour|
|Low||≤1.0%||3.6||-||For example, 100 transmissions of 360 milliseconds within one hour|
|High||≤10%||36||-||For example, 100 transmissions of 3.6 seconds within one hour|
|Very High||Up to 100%||-||-||Typically continuous transmission but also those with a duty cycle greater than 10%|