User manual

Troubleshooting
Table 1: Adapter Status LED (cont.)
Color Illumination Description
Solid The adapter sensed an attempted connection of a USB connection to
a non USBTMC-USB488 device. The adapter refused to make the
connection.
Red
Blinking
If in o perational mode, the power-up self test failed.
If in the firmware upgrade mode, the firmware upgrade failed.
None
Off If in operational mod e, the GPIB is off line.
It may also m ean that the ada pter is not powered on.
Table 2: USB Status LED
Illumination Description
Off No U SB connection is present
Solid A USB con nection is present, and there is no activity
Blinking
A USB conn ection is present, and data is being transferred on any of the USB endpoints.
20 TEK-USB-488 GPIB to USB Adapter User Manual