iCOMPEL Content Commander User Guide
159
11. Technical Reference
This section contains technical reference topics not covered elsewhere:
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Optimizing Playback Performance
– Enhancing the playback performance of specific media types.
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– Understanding RS-232 pin assignments and electrical interfaces.
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– Understanding which files and folders the iCC saves in a backup.
11.1 Optimizing Playback Performance
You can optimize the playback performance of specific media by taking note of these points:
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The player units have no problem displaying MPEG-2 video at a reasonable rate (up to 10 Mbps). This typically uses less
than half of the player processing power.
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You should resize images (especially digital photos) before uploading them onto the iCC. Ideally, resize them so that they
match the size of the zone.
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Scrolling text uses relatively little processing power, provided it does not take up more than 30% of the screen area.
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Animations (typically in Flash or HTML with embedded JavaScript) have no upper limit to the processing power they require
and can overwhelm the player. If this occurs, the animation will typically run slowly but other zones will continue as normal.
11.2 RS-232 Technical Reference
The pin assignment of the RS-232 9-way D-PLUG is as follows:
Pin
Direction
RS-232 Name
Quiescent State
1
Input to iCC
DCD
High impedance
2
Input to iCC
RxD
High impedance
3
Output from iCC
TxD
-ve voltage level
4
Output from iCC
DTR
-ve voltage level
5
Sig. GND
6
Input to iCC
DSR
High impedance
7
Output from iCC
RTS
-ve voltage level
8
Input to iCC
CTS
High impedance
9
Input to iCC
RI
High impedance
For historical reasons, the RS-232 standard uses a variety of terminology to describe its signal status:
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Lowered = Negated = Logic 1 = -ve voltage = Off = Marking.
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Raised = Asserted = Logic 0 = +ve voltage = On = Spacing.
The iCC uses voltage level in order to describe line status since this is the only explicit identification.
Содержание iCompel ICOMP-ICC
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Страница 11: ...Part I Welcome to Black Box Digital Signage...
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Страница 25: ...Part II Creating Digital Signage...
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Страница 45: ...Part III Understanding Media Types...
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Страница 79: ...Part IV Enhancing Your Displays...
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