Quantum Data 801GC, 801GF, 801GX Owner's And Programmer's Manual page 101

TV Vectorscope signature of the upper color bar portion of
the SMPTEbar Image using NTSC color encoding on the
801GX's TV output
TV Vectorscope signature of the lower portion of the
SMPTEbar Image showing -I and Q color difference signals
using NTSC color encoding on the 801GX's TV output
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