Abstract: A system having a picture pick-up device (CAM) such as a camera, a picture signal storage device (Dsc) in the form of a disc, for example, and in a picture signal source (VPC) a playing device (VP) suitable for this disc, coupled to an electronic picture display device (Vmon) or still picture printer (Prt), respectively. During the adjusting operation a reference test pattern signal coming from a generator (Tst) is applied to the picture display device (Vmon) or printer (Prt), respectively, through a picture signal processing circuit (Proc). Subsequently, the pick-up device (CAM) picks up the picture displayed or the picture printed, respectively, and the picture signal obtained thus is stored in a storage device (Dsc). Then, this picture signal and the reference picture signal are compared in a signal comparing circuit (Comp). Adjusting data corresponding with the differences between these signals are stored in a memory (Mem) coupled to the circuit (Proc).

Abstract: In a magnetic-tape cassette having adjacent flanged reels mounted for rotation in a housing, coupling members connect the reels to the winding mandrels on a cassette apparatus. Each member has an axial portion extending through the housing for engagement by a spring which presses the reel against an apparatus reel disc, and radially resilient limbs extending in the opposite direction for engaging the mandrel.