Measurement Computing USB-1608FS - Manual (Page 17)

USB-1608FS User's Guide
17
Synchronized operations
You can run up to two USB-1608FS devices on most computers. You can connect the SYNC pin of two devices
together in a master/slave configuration and acquire data from the analog inputs of both devices using one
clock. When the SYNC pin is configured as an output, the internal A/D pacer clock signal is sent to the screw
terminal. You can output the clock to the SYNC pin of a second device that is configured for A/D pacer input.
Change to SYNC pin setting not implemented until first scan
When you change the setting of the SYNC pin to input or to output using InstaCal, the change does not take
place until you run a scan with a USB-1608FS.
Consequently, if you change the SYNC pin from output to input, the SYNC pin remains an output, and
connections to this pin are connections to an output until the first scan runs. This will not damage the
USB-1608FS.
To update the SYNC pin setting before connecting to the SYNC pin, run the InstaCal analog Scan Test .