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Rastergraf
3-12 Connector Pinouts and Cable Information
input applications. Each input is connected to the digitizing chips by a .1
uF input capacitor and presents a (DC) 75-ohm impedance to the driving
source. No low pass filtering is done on the signals. The Bt835 multiplexer
is
not
break-before-make, so inputs will be
momentarily
connected
together when switching from one input to another. YOUT (luminance or
brightness), VOUT, and COUT (chrominance or color) are the outputs of
the SM731 VGA to NTSC/PAL encoder.
Loopback Mode
Note that as a test feature, a control bit can make the VOUT loopback to
VIN1. The only time the loopback should be enabled is when VIN1 is not
otherwise connected.
RGBHV Input
The MDR26 connector can be used to connect to the high-speed (HS)
digitizer, which acquires RGBHV or RGB + SOG, up to 1280 x 1024 at
120 MHz. The table above shows the
MDR26 Pinout 26A
pin definitions
share pins between the NTSC/PAL digitizer and the high-speed digitizer.
The connections are wired in parallel except for that the 75-ohm
terminations on VIN3 and CIN are removed in HS mode.
3.5.2 MDR26 Pinout 26B – DVI Input, Ch 1 LVDS Out
The table above shows the
MDR26 Pinout 26B
pin definitions which
enable the DVI inputs of the high-speed AD9882 digitizer at up to 1024 x
768. Using this mode is definitely a second choice to using the DVI-I
connector’s (usually) DVI output function for digitizing.
3.5.3 MDR26 Pinout 26C – Ch 1 and CH 2 LVDS Out
The table above shows the
MDR26 Pinout 26C
pin definitions which
enable the both LVDS ports to be connected. This can support dual 1024 x
768 or a single dual-link 1600x1200 display. For convenience of cabling,
the pinout follows the CameraLink frame grabber side basic configuration.
Not that there is no actual CameraLink support on any board.