P TG 5610 B/D Reference Manual. Rev 1.0
Page 32 of 53
Various elements in the pattern can be user configured. The available settings and
defaults are shown below:
Aspect Ratio Element:
ON / OFF
(default ON)
Reserved Area Element
:
ON / OFF
(default ON)
Ramp Mode:
Luma Ramp / Chroma Ramp
(default Chroma Ramp)
Motion Sequence:
Transmission Alive + AV Sync Test
(default)
or,
Transmission
Alive
ONLY
or,
AV
Sync
Test
ONLY
Audio Sequence:
Three Level Test Tone
(default)
or,
Adjustable Sinewave Generator
NOTE.
Please refer to the annex in the rear of this manual
"EBU Digital AV
Sync and Operational Test Pattern”
this will provide detailed information on the
pattern composition and uses.
LCD Panel Persistence Test
This pattern is useful for checking for persistence (or smearing) problems on the newer
LCD panel displays and consists of a small light grey square moving across a light grey
background.
The background and foreground levels are user adjustable (0-100%) default values are
foreground 50% Y level and background 40% Y level. The speed of the moving square is
also user adjustable (default level is 5 where 0 = still and 127 = max)
For checking CRT Phosphor persistence on Tube style displays then the settings should
be changed to a 100% white foreground square moving on a 0% white background,
adjust the speed of the moving square to observe persistence or “lag” in the phosphor.
LCD panels are susceptible to a “smearing” artifact when there is a small change in level
between pixels which [on real images] tends to compromise subtle detail in when motion
is present. To test for this artifact this pattern has a (default) grey background with a
slightly lighter grey square in motion left to right. Narrowing the foreground / background
level difference (using the user controls) and adjusting the velocity of the moving square
can help highlight the problem.
The small square moves from left to right and then up the screen one row at a time.
When it reaches the top – the sequence repeats. Using “Pattern Preferences” its possible
set the foreground and background luminance level, the velocity of the grey square and
also the aspect ratio to 4:3 or 16:9 (incorrect aspect ratio setting will make the square a
rectangle)
