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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 operational mode, the power-up self test failed.

If in the ﬁrmware upgrade mode, the ﬁrmware upgrade failed.

None

Off If in operational mode , the GPIB is off line.

It may also mean that the adapter is not powered on.

Table 2: USB Status LED

Illumination Description

Off No USB connection is present

Solid A USB connection is present, and there is no activity

Blinking

A USB connection is prese nt, and data is being transferred on any of the USB endpoints.

TEK-USB-488 G PIB to USB Adapter User Manual 19

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