Synchronizing Acquisition On Multiple Dt9837A, Dt9837B, Or Dt9837C Modules - Data Translation DT9837A User Manual

Synchronizing Acquisition on Multiple DT9837A,
DT9837B, or DT9837C Modules
DT9837A, DT9837B, and DT9837C modules provide an RJ45 (LVDS) synchronization
connector that you can use to connect and synchronize multiple DT9837A, DT9837B, or
DT9837C modules. In this scheme, one module is the master and the other modules are the
slave. You specify the synchronization mode (master, slave, or none) of the RJ45 connector
using software.
When configured as a master, the RJ45 synchronization connector outputs trigger and clock
signals. When configured as a slave, the RJ45 connector accepts trigger and clock signals from
the master; you cannot use the Ext Trig connector or the analog threshold trigger on the slave
module in this configuration. When configured as none (the default mode), the DT9837A,
DT9837B, or DT9837C module uses the USB clock instead of the RJ45 synchronization
connector. The synchronization mode remains set until changed or until the application exits.
You can connect multiple modules in one of two ways.
maximum of two DT9837A, DT9837B, or DT9837C modules by daisy chaining them together
through the RJ45 connector.
DT9837B, or DT9837C modules by using an RJ45 distribution panel, such as the EP386, where
the panel contains four RJ45 connectors that are wired in parallel.
Note: You must have revision H or later of the DT9837A module or revision F or later of the
DT9837A-OEM module to be able to attach four modules together. You can identify the
revision of your module by looking at the serial number label on your module.
If you have revision G or earlier of the DT9837A or revision E or earlier of the
DT9837A-OEM, you can attach a maximum of two modules together.
Figure 26 shows how to connect a maximum of four DT9837A,
Figure 25 shows how to connect a
Principles of Operation
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