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Bruker Optik GmbH IFS 125M User Manual
Troubleshooting 7
7.7 No data transfer between spectrometer and PC
In this case troubleshooting depends on the connection topology. The default connection
(stand-alone configuration) is installed via a cross-over cable between the PC and the
spectrometer 100Base-T port (labelled ETH on the mobile electronics unit).
Alternatively, the spectrometer can be directly connected to an Ethernet network using
the 100Base-T port.
i
The direction of the data transfer is indicated by the RX and TX LEDs on the mobile
electronics unit. The TX LED is active when the spectrometer sends data, and the RX
LED is active when the spectrometer receives data.
7.7.1 RX LED permanently off
If the green RX LED is permanently off, there may be a problem with regard to the phys-
ical connection between the spectrometer and the PC or network.
Possible cause Troubleshooting
Wrong cable type used • Use a CAT5 cross-over 100Base-T cable to
directly connect the spectrometer to the PC.
• Use a regular CAT5 100Base-T cable to link the
spectrometer to an existing network.
• Ask your local network administrator.
Defective cable or unstable
connection
• Check the RJ-45 connection to the ETH port ,
and the connection at the other end of the cable.
• Replace the cable, if necessary
Spectrometer does not start
up
Check main power supply.
i The voltage status LEDs +5V, +12V and -12V,
which are located on the mobile electronic unit,
must be green when the spectrometer is
switched on.
Table 7.11: RX LED permanently off
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