A multifunctional integrated dimming controller and an LED solar traffic marking panel fitted with this controller. According to the solution, a different pilot symbol sequence is allocated to each user entity, and the pilot symbol sequences of user entities are selected by allocating different frequencies for pilot symbol sequences of different user entities according to a frequency division multiple access technique in order to mitigate the effect of multiple access interference. The phase-locked loop may include a counter which is incremented by a local device system clock and latched by a frame synchronisation marker received from a remote device, whereby the counter output comprises a feed forward signal. Moreover, the implementation of this controller does not need rates of the swing angles. The calculating and grouping are then repeated iteratively based on the previous clustered layout. The cutting device includes a laser whose beam is directed transversely to the product discharge direction and passes through the product string in order to cut it into portions.