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Bruker Optik GmbH IFS 125M User Manual
Connection Ports 10
10.3 User input/output signals (UIO signals)
The UIO signals are useful to synchronize externally performed experiments, i.e. experi-
ments performed outside the spectrometer.
10.3.1 Pin assignment
UDQENA is only active during data acquisition, gating the actual data acquisition.
XAOUT are the digitized zero crossings used for interferogram sampling. TKDAM is
active while the interferometer is within the scanner range, where the XAOUT pulses are
used for data acquisition. TKDAM is also active if no data are acquired, it just marks the
scanner to be in the proper position.
User input/output plug pinout
• UDQENA: Data acquisition enable
• XAOUT: Sampling points
• URET: Ground external (galvanically iso-
lated from spectrometer)
• VCC: +5 V internal
• UCC: +5 V external (galvanically isolated
from spectrometer)
• TKDAM: Take data
• FWD: Forward
• GND: Ground internal
Left: recommended connection with full galvanic isolation (requires external 5 V supply)
Right: connection without galvanic isolation (no external supply required); R = 2200 Ohm
Table 10.4: Pin assignment