Ocean Optics S2000 - Manual (Page 15)

ADC500 ISA-bus A/D Converter
The ADC500 ISA- BUS A/D C ONVERTER is a 12-bit, 8-channel ISA-bus analog-to-digital converter card that
connects our spectrometers to desktop PCs. This single-ended, half-length card fits into an ISA slot in a desktop PC,
and has a 500 kHz sampling frequency. The following are directions for installing your ADC500. Because A/D
converter installation goes hand-in-hand with software installation, you will find directions for installing OOIBase32
Spectrometer Operating Software included in this section as well.
Each device in or connected to your computer is assigned specific settings; it’s similar to giving each device its own
name so that your computer will know what to call and how to recognize the device. In order for your ADC500 to
work as a device in your computer, it has to be assigned a Base Address setting and an IRQ setting. The default
settings for each are:
Base Address (I/O Range): 768 decimal (300 hexadecimal)
IRQ (Interrupt Request): 07
These default values are set on the A/D converter. There are dip switches on the A/D board and their positions
determine the values. These default values are set in the operating software as well. Most of the time, these default
settings will work with your computer. However, if you have many devices installed in your computer, you may have
a conflict; other devices may be using these settings. If there is a conflict with another device in your computer, you
must change the positions of the switches on the A/D board and change the values in the software.
For the ADC500, the Base Address is set via the bank of 6 switches labeled SW1 on the A/D board and the IRQ is
set via the bank of 4 switches labeled SW2 on the A/D board. To first check your computer to see which settings are
available, follow the instructions for your Windows operating system.
Windows 95 and Windows 98 Users:
Find Available Base Address and IRQ Settings
1. Go to Start | Settings | Control Panel and double-click on the System icon.
2. Choose the Device Manager tab and double-click on “Computer” at the top of the list.
3. Under View Resources, find available settings -- numbers unassigned to hardware. Note these available settings
for both the Interrupt request (IRQ) and the Input/output (Base Address). When you first run OOIBase32, you
must enter these values in the “Configure Hardware” dialog box. (Remember that Input/output settings are
expressed in hexadecimal.)
! !
For most computers, the default settings work well. In the picture above left, it appears that the Printer occupies
IRQ 07, but for most computers, our A/D converters can share the IRQ 07 setting with a printer and conflicts will
not arise. All computers have multiple Base Address (Input/output) settings from which to choose.
A/D Converters: ADC500
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