Reference streams for testing reception, decoding and delivery. Every value is known: bars, PLUGE, grey steps and skin patches carry exact Y′CbCr codes for the declared matrix, range and bit depth; a sync scale with a blip on every whole second shows audio/video offset frame by frame; a clock, timecode and machine-readable data strip identify every frame. Each stream comes with a certificate listing the expected values, and is verified before publication.
The yellow pointer crosses zero exactly when the blip sounds. Read where the pointer is when you hear it: green is within EBU R37 (−60/+40 ms), yellow within ITU-R BT.1359, red is out of tolerance. One tick is one frame.
Each second the blip moves to the next channel (L, R, …) and its box lights up: wrong routing or a delayed channel is heard and seen at once.
One box per frame and a hand turning once a second. Dropped, repeated or out-of-cadence frames break the sequence; the circle must stay round (aspect ratio).
75% bars, PLUGE −2/0/+2/+4%, grey steps and ColorChecker skin patches with exact codes. Compare with the certificate; −2% is truly below black in the signal.
Vertical and horizontal gratings from 1.00 to 0.25 of Nyquist, drawn in real pixels: they show the effective resolution of each ABR rung and any scaling.
64 cells: sync pattern, frame number, milliseconds of the day and parity. Read by the WorldTV DVB-I analyser for automatic measurement.