LED Signaling

The GPIB-USB-HS controller uses two LEDs to indicate status and activity.

When you connect the GPIB-USB-HS controller, the READY LED lights either green or amber once the driver is installed and detected. The following table summarizes the functionality of the LEDs on the GPIB-USB-HS hardware.

Table 1. GPIB-USB-HS LED Descriptions
LED Description
READY Green indicates that the GPIB-USB-HS is plugged into a USB full-speed (USB 1.1) port.

Amber indicates that the GPIB-USB-HS is plugged into a USB Hi-Speed (USB 2.0) port.
ACTIVE Indicates activity on the GPIB bus.

The GPIB-USB-HS+ controller uses a multicolored LED to indicate status and activity. The following table summarizes the functionality of the LEDs on the GPIB-USB-HS+ hardware.

Table 2. GPIB-USB-HS+ LED Descriptions
LED Description
Alternating Amber/Green The GPIB-USB-HS+ is not ready to use. You must install (or re-install) the NI-488.2 driver before using the GPIB-USB-HS+.

Note: Windows 8 and later suspend power to a USB device that does not have a driver attached. If the LED does not light, try reinstalling the NI-488.2 driver.
Steady Green Indicates that the GPIB-USB-HS+ is plugged into a USB full-speed (USB 1.1) port.
Steady Amber Indicates that the GPIB-USB-HS+ is plugged into a USB Hi-Speed 
(USB 2.0) port.
Blinking Amber or Green Indicates activity on the GPIB bus or that the GPIB Analyzer is capturing.