National Instruments VXI/VME 600 - Manual (Page 37)

Appendix B Common Questions
VXI/VMEpc 600 Series for Windows 95/NT B-6 © National Instruments Corporation
What kind of signal is CLK10 and what kind of signal do I need for an
external CLK10?
♦
VXI Only—CLK10 is a differential ECL signal on the backplane.
However, the oscillator and the EXTCLK input on the front panel use TTL
levels; therefore, you need to supply a TTL-level signal for EXTCLK. Our
voltage converters convert the signal to differential ECL.
What is the accuracy of the CLK10 signal?
♦
VXI Only—The CLK10 signal generated by the VXIpc-650 is ±100 ppm
(0.01%) as per the VXIbus specification. If you need a more accurate
CLK10 signal, you can use the external CLK connector on the front panel.
What type of video interface is onboard the VXI/VMEpc-650? What
video drivers are included? If my application requires a special type of
video display, how do I configure my VXI/VMEpc-650?
The VXI/VMEpc 600 Series uses the Cirrus Logic CL-GD5446 chip, a
64-bit graphics accelerator. The chip is compatible with the Standard VGA
video output Microsoft Windows video driver, as well as the Cirrus Logic
video driver. For more information on the video driver, refer to the
c:\images\manuals directory.
What kind of monitor can I use with the VXI/VMEpc 600 Series?
Can I use Super VGA?
VXI/VMEpc 600 Series computers use Super VGA video output. They
work only with monitors having a horizontal scan rate of at least 50 kHz
and a vertical scan rate of 60 Hz.
Caution Make sure your monitor meets this specification. Enabling the Super VGA option
on a monitor that does not meet this specification will damage your monitor.
What should I do if my keyboard connector does not fit into the
keyboard port on the VXI/VMEpc-650?
You can plug keyboards that have a 6-pin Mini DIN PS/2 type connector
directly into the VXI/VMEpc. You can use the keyboard adapter cable that
is included with every VXI/VMEpc 600 Series kit to adapt the larger AT
keyboard connector to the 6-pin Mini DIN connector.
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