ASTRO VG-870B, Instruction Manual

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7.6 0.25- and 0.125-dot scrolling actions (option)
0.25-dot and 0.125-dot scrolling can be set.
This function is optional. (The 0.25 dot and 0.125 dot are separate options.)
For further details, contact your dealer or an ASTRODESIGN sales representative.
Concerning 0.25- and 0.125-dot scrolling
The setting increments used by the regular scrolling function are interval 1 V increments (frames for progressive
scanning and fields for interlaced scanning), and 1-dot increments are used for the movement amounts.
In the case of the VG-870B,871B,873,874 smoother scrolling can be achieved by providing four patterns with a
0.25-dot shift in between (or two patterns with a 0.5-dot shift and 8 patterns with a 0.125-dot shift).
<Example>
When scrolling horizontally for one round at a 1920 × 1080p @ 60p timing of approximately 5 seconds
About 13 dots are required per 2 V and about 6.5 dots (*1) per 1 V.
*1: Amount of movement per 1 V = 1920/ (60*5) = 6.4 ≈ 6.5 [dot]
6dot移動
1フレーム後
13dot移動
移動無し
6.5dot移動
6.5dot移動
・
・
・
・
・
・
・
・
・
1フレーム毎に
6,7,6,7,・・・・・dotの移動量
0.5ドットスクロール
Pattern A
Pattern A
Pattern A
Pattern A
Pattern A
Pattern A
Pattern A
Pattern B
Pattern A
スムーズなスクロールが
可能
滑らかに移動しない
標準設定① 標準設定②
2フレーム毎に13dotの移動 1フレーム毎に6.5dotの移動
7dot移動
2フレーム後
Pattern A ：基準となるパターン
Pattern B ：Pattern Aを0.5dot移動させたパターン
1フレーム後
2フレーム後
1フレーム後
2フレーム後
Standard setting (1)
Standard setting (2) 0.5-dot scrolling
Amount of movement in 6, 7, 6, 7
…
.. dots per frame
Movement by 13 dots per 2
frames Movement by 6.5 dots per frame
Movement by 7 dots
After 2 frames
Movement by 13 dots
After 2 frames After 2 frames
Movement by 6.5 dots
Movement is not smooth.
Smooth scrolling is enabled.
Pattern A: Pattern serving as the reference
Pattern B: Pattern produced when pattern A is moved by 0.5 dot.
Movement by 6 dots
No movement
After 1 frame After 1 frame
Movement by 6.5 dots
After 1 frame