Key Digital ES381 manual General

2 ABOUT THE USBcount50

2.1 General

The USBcount50 has been designed to allow a broad range of input frequencies and pulses to be measured. The input stage supply is programmable to allow the counter to work in circuits generating various Voh levels.

Each USBcount50 can be used as an independent single channel counter but to enhance flexibility several USBcount50s can be stacked together to make a combined 2,3 or 4-channel device. In this case, each counter is synchronised with the others so that the compound device acts like a single multi-channel instrument. Each USBcount50 still needs its own USB connection and the combined device shares a common ground between all the BNC connectors i.e. the channels are isolated from the USB but not from each other.

Elan Digital Systems Ltd. 6 USBcount50 USER’S GUIDE Iss1