TV Generators SAF and SFF are two multistandard instruments (B G/PAL, M/NTSC, M/PAL, N/PAL) suitable for all applications in the field of television. CCVS+Component Generator SAF supplies all test signals and patterns required for video measurements in CCVS, YCBCR, RGB and S-VHS for-mats, for test patterns an aspect ratio of 4:3 or 16:9 being selectable. Where only the CCVS format is required, CCVS Generator SFF can be used.
SAF and SFF also generate all test signals to CCIR Rec. 801, a number of common pathological test signals, and shallow ramps with a resolution of 10 bits. The PALplus test pattern option provides all PALplus reference signals and the bits required for wide screen signaling (WSS).
Both generators afford extensive signal variations via softkey-controlled menus. Such amplitude and phase adjustments of signal components enable testing of gain controls, white-level limiting circuits and video analysers over the whole range of the devices. User-specific signals can be defined by front-panel entry and stored in the generator or on a memory card.
Function
The generator section is of digital design. A transputer – a high-speed RISC processor – calculates the three components Y, CB and CR of all test signals which in CCVS+Component Generator SAF are applied to three D/A converters. An analog matrix converts the three components into the RGB format. Therefore the RGB signals are made available simultaneously with the YCBCR components. The digital CCVS in SAF and SFF is determined from the YCBCR components in realtime with the aid of two LSI gate arrays.
Digital Video Interface SAF-Z1
The optional Digital Video Interface SAF-Z1 upgrades the SAF and SFF for use in digital TV studios. In addition to the analog video signals, a parallel and two serial digital video signals are thus simultaneously available.