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The Kramer 810 is a high-performance S-Video (Y/C) color bar,
Composite video and plus 1kHz audio tone generator with
selectable multi-standard PAL or NTSC output. It outputs two
(2) Composite video and one (1) S-Video color bar signal in
either PAL or NTSC and a 1kHz audio tone simultaneously.
You can rackmount three (3) units side-by-side in a 1U rack
space plus the optional RK-3T rack adapter.