2 Operation and Features34 Keysight U2722A/U2723A User’s GuidePower UpTake note of the following when you power up the U2722A/U2723A.– The U2722A/U2723A can only be operated via the USB interface.– Before you can control the U2722A/U2723A, you need to install the hardwaredriver and the IO Libraries Suite 14.2 or higher. Both of these are includedwhen you purchase the U2722A/U2723A. Refer to the Keysight USB ModularProducts and Systems Quick Start Guide for the installation procedure.– On the front panel of the U2722A/U2723A, there are two LED indicators. Referto “Product outlook” on page 19.– Power indicator lights up once the U2722A/U2723A is powered up. It will blinkif there is a system error.– USB indicator will only blink when there is data exchange activity between theU2722A/U2723A and the PC.