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Troubleshooting
USB signals are generally reliable but are susceptible to bad connections or cables that
are too long. The TP cable can have the same issues. To avoid the loss of data and
communications, follow these guidelines:
•
•
•
•
When properly connected and operating, the transmitter and receiver Power LEDs, Link
LEDs and Host LEDs are lit. The Hub LED for each connected peripheral recognized by the
host PC is also lit.
Front panel LEDs are also useful for troubleshooting. The following table outlines operating
details indicated by the LEDs:
LED
On
Indicator
Power
12 VDC power supply is
connected and operating
properly.
Link
Both transmitter and receiver
are paired, have power, and
are connected properly by
the TP cable.
Host
When transmitter power
LED is on, lights when
communication with host PC
is established.
Hub
N/A
The USB cables that connect the transmitter to the host or the receiver hub ports to
peripheral devices should not exceed 6 feet (1.8 meters).
When connecting the host or peripherals, use only cables designed for USB signals.
Avoid or limit the use of adapters.
The USB Extender Plus works as described in point-to-point applications. Do not use
additional adapters, patch panels, or couplers with the host USB cables, hub USB
cables, or twisted pair cables. Additional links in the signal chain can result in the
reduction of signal integrity and overall system performance.
Transmitter
Off
12 VDC power supply is not
connected or is defective.
If both Power LEDs are on, the
TP cable is not connected or is
improperly wired, or the units are
not paired.
If either Power LED is off, see
the Power LED troubleshooting
instructions, above.
If transmitter power LED is on,
USB cable is not connected.
N/A
USB Extender Plus Series • Installation and Operation
Receiver
On
Off
12 VDC power supply is
12 VDC power supply is not
connected and operating
connected or defective.
properly.
Both transmitter and receiver
If both Power LEDs are on, the
are paired, have power, and
TP cable is not connected or is
are connected properly by
improperly wired, or the units
the TP cable.
are not paired.
If either Power LED is off, see
the Power LED troubleshooting
instructions, above.
Lights when communication
Host USB port is not
with host PC is established.
connected or host is not
communicating.
Blinks if power and Link
LEDs are on, but no USB
devices are connected.
Lights when a connected
A peripheral device connected
peripheral is recognized by
to the USB port has not been
the host PC.
recognized or is improperly
connected.
21
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