All bursts are timed with respect to this programmable periodic frame.
A method for allocating a resource in a periodic frame of an asynchronous digital satellite network to each packet burst of sporadic connections transmitted by earth stations.
The engraving signal is formed by superimposing the image signal representing the tonalities to be engraved.
The grating structure (2) comprises an arrangement of pores (4) and a defective zone (5).
The pores (4) outside the defective zone (5) are arranged in a periodical pattern and the periodical pattern is disturbed in the defective zone (5).
An engraving control signal (GS) is formed from an image signal representing the tone values of the cup shapes to be engraved, and a periodic raster signal (R) for producing a printing raster.
An engraving control signal is formed from an image signal that represents the tone values of the cup shapes to be engraved, and a periodic raster signal (R) for producing a printing raster.
The engraving signal (G) is formed by superimposing an image signal representing the shade values ôlight and darknessö of the grooves to be engraved and a periodic screen signal for generating the printing screen.