Table 4. NI 5772 Clock Sources
Clock Source
Frequency
1
Description
Internal Free-Running Sample
Clock
800 MHz
The internal Sample Clock is free-
running.
Internal Sample Clock PLL
On (IoModSyncClock)
800 MHz
The internal Sample Clock locks to
IoModSyncClock, which is provided
only though the backplane of
NI PXIe-796
x
devices.
Internal Sample Clock PLL
On (REF IN)
800 MHz
The internal Sample Clock locks to an
external 10 MHz Reference clock,
which is provided through the REF IN
front panel connector.
External Sample CLock (CLK
IN)
400 MHz to
800 MHz
An external Sample Clock can be
provided through the CLK IN front
panel connector.
Note
Do
not
connect an external Sample Clock with a frequency greater than
800 MHz to the CLK IN front panel connector to acquire data at rates greater than
800 MS/s. Instead, use an external clock with a frequency between 400 MHz and
800 MHz and configure the CLIP to use TIS.
You can configure the NI 5772 to use a variety of sampling modes. By default, the NI 5772
takes samples at 800 MS/s through both analog input channels; however, you can take samples
through one analog input channel to increase the sample rate. The table below lists the
sampling modes available on the NI 5772.
1
You can use TIS to acquire up to 1.6 GS/s. Refer to the
NI FlexRIO Help
for more information
about configuring your NI 5772 CLIP.
NI 5772R User Manual and Specifications | © National Instruments | 17