Black Box ACS235A - Manual (Page 14)

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CHAPTER 3: Configuring the ACS235A
3. Configuring the ACS235A
This chapter describes how to configure the PC model of the ServSwitch™ Brand
Fiber KVM Extender (ACS235A). If your Extender is the Sun model (ACS236A),
see Chapter 4.
3.1 Configuring for RGB Video
In normal configuration at delivery time, the Extender units are configured to
carry video from a VGA source to a VGA monitor. But if you’d like to attach RGB
equipment (either an RGB source or an RGB monitor or both) to your Extender
system, this section discusses how you might need to set the units’ configuration
jumpers. (See Table 3-1 on page 15 for a full layout of this.) Of course, RGB video
can come in a variety of signal forms and combinations. If after reading the rest of
this section you’re not sure how to get your RGB application working (or even
whether it can be done), call Black Box for technical support.
NOTE
In any application involving RGB video, if the picture on your monitor
looks OK with AGC ON, leave the Local Module’s JP3 jumper and the
Remote Module’s JP8 jumpers in their factory settings. Otherwise,
remove JP3 at the Local Module and move JP8 at the Remote Module to
turn AGC OFF. You will then have to adjust the gain of the Extenders’
video signal manually. See Sections 3.2.3 and 3.3.2.
3.1.1 VGA
VS
. RGB S
IGNALING
VGA uses two video-synchronization signals, HSYNC (horizontal sync) and VSYNC
(vertical sync). In its factory-default settings, the Extender’s Local Module receives
these signals from the CPU and overlays them on the color signals for transmission
to the Remote Module: HSYNC on green, VSYNC on blue, and SYNCPOL (the
combined HSYNC and VSYNC polarity information) on red. But most RGB
applications use a single CSYNC (composite sync) signal overlaid on the green
color signal instead, so for such applications you’ll need to have the Local Module
substitute this signal for HSYNC, as well as create its own SYNCPOL information
for use by the Remote Module. Then you might have to set the Remote Module to
process these signals properly at the other end.
3.1.2 VGA V
IDEO
C
ARD TO
RGB M
ONITOR
(VGA
TO
RGB C
ONVERSION
)
To connect a CPU that outputs VGA video to an RGB monitor, remove the Local
Module’s JP2 jumper (so that it generates the CSYNC signal needed by the RGB
monitor), but leave the JP6, JP10, and JP11 jumpers in their factory-default
settings (see Sections 3.2.1 and 3.2.2). At the Remote Module, install jumpers at