Connecting The Reference Clock I/O Signal - Contec DIG-100M1002-PCI User Manual

Connecting the Reference Clock I/O Signal

This section shows an example of how to connect reference clock I/O signals using BNC cable.
User can use an optional BNC cable (BNC-Bxxx) to connect your external devices to CLK.
External trigger I/O signal is the positive logical I/O.
All the I/O signals are 3.3VLVTTL level.
In addition, the reference clock I/O signal also can be used as BNC connector of CLK. Therefore, it can
be only used as either the input or the output.
Switching I/O can be done by the software.
BOARD
Reference
50Ω
CLK (IN)
Digital Ground
Figure 3.7. Connecting the Reference Clock Input
BOARD
Reference
CLK (OUT)
600Ω @10MHz Typ
Ground
Figure 3.8. Connecting the Reference Clock Output
CAUTION
- Do not connect any output signal to the analog or digital ground. Do not interconnect outputs.
Doing either can cause a malfunction.
- The input is the default at startup.
DIG-100M1002-PCI
CLK
Shield cable
CLK
Shield cable
Digital
3. External Connection
Target
Target
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