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2.5 Multiple Ndigo boards synchronization

Using several Ndigo devices in applications that use more channels than a single board can

provide requires synchronized operation. To ensure exact synchronization, a delay parameter

needs to be set for each board. This parameter might change in case boards are swapped, added

or removed and in some cases might change after a ﬁrmware update.

The calibration tool “MultiboardCalibration.exe” is available after installing the Ndigo device

driver. It is used to ﬁnd appropriate delay values for each board in a given board setup. After

starting, the application lists all Ndigo boards found (Figure 2.17).

Figure 2.17: Main window of the multiple boards sync calibration tool.

A board’s appropriate delay depends on whether it operates in master or slave mode. The

respective values can be set in the column “Delay M” (for master boards) and “Delay S” (for

slave boards). The designated master board can be selected in the column “Master”. The

calibration procedure creates a histogram for each board, displaying the current delay between

the boards. The histogram can be viewed by clicking on “Show!”. When the appropriate delay

values are found, they can be stored in the on-board ﬂash prom by clicking “Do it!” separately

for each board. Clicking “Flash All!” will write the values to all boards at once. Please note:

Flashing the values might take up to 10 seconds during which the program might not respond.

Important note:If the application reports a “PLL not locked” error check the cable. If the

recording of histograms does not make progress check the cable. Make sure the cable is properly

terminated at both ends and ﬁrmly attached to each card.

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Cronologic Ndigo Crate Guía de usuario Pagina 21