Clocking - National Instruments NI-6587 Getting Started Manual

Custom Accessories
If you are creating a custom accessory to use with a DUT with a VHDCI DDC connector, you
can purchase the mating connector for the VHDCI cable from NI. For more information about
creating these custom accessories, refer to the Interfacing to the NI Digital Waveform
Generator/Analyzer using the VHDCI Connector application note.
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If you are designing a custom accessory to use with a device that uses an InfiniBand
connector, you can also purchase this connector from NI.
If you design a custom cabling solution with the DDC connector (779157-01)
Note
and SHB12X-B12X shielded cable (192344-01), the NI 6587 pinout is reversed at
the end connector. For example, the signal shown on pin 1 maps to pin 73 at the end
connector.
For more information about connecting I/O signals on your device, refer to the NI 6587
Specifications.
Related Information
http://www.ni.com/info

Clocking

The clocks on the NI 6587 control the sample rate and other timing functions on your
NI FlexRIO system. The following figure shows the NI 6587 clock sources routed through the
crosspoint switch. The Generation Bank I/O clock, PFI Bank I/O clock, and Global clock are
all sourced by the crosspoint switch. The Acquisition Bank I/O clock can be sourced from the
crosspoint switch or accessed directly through the Strobe Bypass path.
Only the Acq_IO_Clock_Source signal can use the STROBE Bypass path. If
Note
Acq_IO_Clock_Source is set to Strobe Bypass, then Gen_IO_Clock_Source,
PFI_IO_Clock_Source, and IO_Module_Clock_1_Source cannot be set to Strobe
From Crosspoint Switch.
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