National Instruments NI 5422 - Manual (Page 18)

NI 5422 Specifications 18 ni.com
Onboard Clock
(Internal VCXO)
Phase-Locked Loop (PLL) Reference Clock
Table 3.
Specification Value Comments
Clock Source Internal sample clocks can either be locked to a Reference
Clock using a phase-locked loop or be derived from the
onboard VCXO frequency reference. —
Frequency
Accuracy ±25 ppm —
Table 4.
Specification Value Comments
Sources 1. PXI_CLK10 (backplane connector)
2. CLK IN (SMB front panel connector)
The PLL
Reference Clock
provides the
reference
frequency for the
phase-locked
loop.
Frequency
Accuracy When using the PLL, the Frequency Accuracy of the
NI 5422 is solely dependent on the Frequency Accuracy
of the PLL Reference Clock Source. —
Lock Time ≤200 ms —
Frequency
Range 5 MHz to 20 MHz in increments of 1 MHz.
Default of 10 MHz.
The PLL Reference Clock Frequency has to be accurate
to ±50 ppm.
—
Duty Cycle
Range 40% to 60% —
Exported PLL
Reference
Clock
Destinations 1. PFI<0..1> (SMB front panel connectors)
2. PXI_Trig<0..6> (backplane connector)
—