Introducing The Usb-1208Fs - Measurement Computing USB-1208FS User Manual

Chapter 1

Introducing the USB-1208FS

This user's guide contains all of the information you need to connect the USB-1208FS to your computer and to
the signals you want to measure.
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The USB-1208FS is a USB 2.0 full-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-1208FS features eight analog inputs, two 12-bit analog outputs, 16 digital I/O connections, and one
32-bit external event counter. The USB-1208FS is powered by the +5 volt USB supply from your computer. No
external power is required.
The analog inputs are software configurable for either eight 11-bit single-ended inputs, or four 12-bit
differential inputs. Sixteen digital I/O lines are independently selectable as input or output in two 8-bit ports.
A 32-bit counter can count TTL pulses. The counter increments when the TTL levels transition from low to
high (rising-edge).
A SYNC (synchronization) input / output line lets you pace the analog input acquisition of one USB module
from the clock output of another.
The USB-1208FS is shown in Figure 1. I/O connections are made to the screw terminals located along each side
of the USB-1208FS.
Figure 1. USB-1208FS
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