Chapter 1
Introducing the USB-1208LS
This user's guide contains all of the information you need to connect the USB-1208LS to your computer and to
the signals you want to measure.
The USB-1208LS is a USB 1.1 low-speed device supported under popular Microsoft
®
Windows
®
operating
systems. It is designed for USB 1.1 ports, and was tested for full compatibility with both USB 1.1 and USB 2.0
ports.
The USB-1208LS features eight analog inputs, two 10-bit analog outputs, 16 digital I/O connections, and one
32-bit external event counter. The USB-1208LS is powered by the +5 volt USB supply from your computer. No
external power is required.
The USB-1208LS analog inputs are software configurable for either eight 11-bit single-ended inputs, or four
12-bit differential inputs. An on-board industry standard 82C55 programmable peripheral interface chip
provides the 16 digital I/O lines in two 8-bit ports. You can configure each digital port independently for either
input or output.
The USB-1208LS is shown in Figure 1-1. I/O connections are made to the screw terminals located along each
side of the USB-1208LS.
Figure 1-1. USB-1208LS
1-1
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