THORLABS GAN1x1 Series, Руководство пользователя

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SD-OCT Base Unit Chapter 2: Setup
Page 14 MTN020880-D02
Figure 12 External A-Scan Trigger Attached using an SMA Tee Connector
(Analog Inputs and Trigger I/O Connector to the Left)
Using the Trigger I/O Feature
The Trigger I/O feature provides a LVTTL (3.3 V) trigger interface that can be configured as an input or output
(SMA connector Trigger I/O at the backplane of the OCT Base Unit).
An example of this feature is the implementation of a B-scan trigger. Configured as an output, a trigger pulse
will occur after every finished B-scan of the continuous OCT imaging. When using the trigger I/O port configured
as an input, a trigger pulse initiates a single B-scan.
ATTENTION
To ensure correct trigger functionality, use a 50 Ω coaxial cable and make sure that the
connected device incorporates a 50 Ω input/output impedance.
If the coaxial cables or the input/output impedance of the connected device differs (e.g. 1 M Ω ),
the trigger signal will be distorted and the trigger functionality might not work.
If the input/output impedance of the connected device cannot be adjusted, use an additional
50 Ω feedthrough terminator in line with the coaxial cable (Thorlabs Part Number T4119).