Rastergraf Topaz, User Manual

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Rastergraf
Connector Pinouts and Cable Information 3-5
3.2 VGA Connector
Analog graphics output is provided on a standard VGA style compressed
15 pin D-Sub and is used with an “Autoscan” type monitor. You must use
the correct initialization, since a VGA monitor depends on the sync
polarities to determine operating frequency. The polarities of the
Vertical/Composite Sync and Horizontal Sync are controlled by the
SM731 graphics controller chip (see
Section 5.2 ).
See the
Note
in Section
4.7 concerning composite sync on green and RGBHV video out modes.
If you have problems, please contact Rastergraf for assistance.
The R, G, and B video outputs are driven by the SM731 graphics
controller chip which is capable of driving terminated cable (75 ohms) to
standard RS-330/IRE levels. Cable length should be limited to 50 feet
unless you use low loss RG-59.
If you really want to roll you own, the PMC board side VGA connector is
an AMP 788574-1. Be sure to use 75-ohm coax for the R, G, B. You can
use TP or coax on H, and V. A cable that would work is Mogami W3206-
8 (
http://www.mars-cam.com/ccd/mogami/digital3.html ).
Important Note
Because two VGA connectors are a tight fit on the TopazPMC/1V, some
VGA connector moldings are too wide to allow two cables to be plugged
in simultaneously. Rastergraf can supply cables that are known to fit. The
cable part number is A31-00599-1012. See
Section 3.8 .