Secondaries with the Pros - The Art and Technique of Digital Color Correction - page 223

Fig. 6.25 Source image courtesy Randy Riesen.
Fig. 6.26 Scopes showing source image from Tektronix WVR 7100.
Upper left is RGB Parade. Lower left is RGB Parade expanded to show black level. Upper right is composite
waveform. Lower right is a vectorscope at standard zoom.