Keithley DAC-02 User Manual page 36

Table 8-1. Troubleshooting Information (cont.)
Symptom Possible Cause
Output voltage does The most common cause of this
not match input data problem is that the I/O bus speed
is in excess of 8 MHz.
An open connection exists.
Another system resource is using
the specified base address.
Computer does not Board not seated properly.
boot.
The base address setting of the
DAC-02
of another system resource.
The power supply of the host
computer is too small to handle
all the system resources.
System lockup A timing error occurred.
If your board is not operating properly after using the information in
Table 8-1, continue with the next two sections to further isolate the
problem.
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Possible Solution
Reduce I/O bus speed to a maximum of
8 MHz (to change the I/O bus speed, run
BIOS setup). See the documentation for
your computer for instructions on
running BIOS setup.
Check wiring to screw terminal.
Reconfigure the base address of the
DAC-02
more information. Check the I/O
assignments of other system resources
and reconfigure, if necessary.
Check the installation of the board.
Check the base address settings of your
board conflicts with that system resources; each address must be
unique.
Check the needs of all system resources
and obtain a larger power supply.
Press [Ctrl] + [Break].
board; refer to page 3-3 for
8-3