Table 5 Results Of Roll/Crawl Speed Settings - Videonics PowerScript PS4000S Instruction Manual

Chapter 6
The following table shows resulting speeds (in fractional and multiples of the scan rate)
for the acceptable Speed values. Note that the results are shown for the NTSC/525 and
PAL/625 PowerScript models.
Table 5: Results of Roll/Crawl Speed Settings
Start/Stop Options Use these options to control where the first and/or last item in the rolling or crawling
page appears on the screen.
Use this option when you want a roll or crawl to last a specific amount of time. Enter a
Duration Target
value indicating the number of seconds you want to allocate for the roll or crawl. For
example, if you want the effect to last for 12 seconds, enter that value in the text box.
Duration Matching Duration Matching lets you specify a method you want PowerScript to use in attempting
to meet the target you have specified. Enter your desired duration in the Duration Target
field, then click Duration Matching to display this dialog box.
Each of the four options here (Next Higher/Lower Optimum Speed and Next Higher/Lower
Target Options
Acceptable Speed) apply a different algorithm (or, calculation) to the Duration Target value
to determine the closest match. For example, if you set Duration Target to 12 seconds,
100
Speed Setting NTSC/525 Result
1 15 lps
2 30 lps
3 60 lps
4 120 lps
5 180 lps
6 240 lps
7 300 lps
8 360 lps
9 420 lps
10 480 lps
Begin Roll/Crawl from
middle of screen
u
Begin Roll/Crawl from
off-screen
u
You cannot combine a Start off-screen roll/crawl with a Stop off-screen roll/crawl.
Target Options
PAL/625 Result
12.5 lps
25 lps
50 lps
100 lps
150 lps
200 lps
250 lps
300 lps
350 lps
400 lps
START STOP
ROLL/CRAWL OPTIONS
NEXT HIGHER OPTIMUM SPEED
NEXT LOWER OPTIMUM SPEED
NEXT HIGHER ACCEPTABLE SPEED
NEXT LOWER ACCEPTABLE SPEED
Using PowerScript
End Roll/Crawl at
middle of screen
u
End Roll/Crawl
off-screen