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NI 5421 Specifications 16 ni.com
System Phase Noise and Jitter (10 MHz Carrier)
Sample Clock
Source
System Phase Noise
Density
(dBc/Hz) Offset
System Output Jitter
(Integrated from
100 Hz to 100 kHz)
1. High-
Resolution
specifications
increase as the
Sample Rate is
decreased.
2. NI PXI-5421
PXI Star
trigger
specification is
valid when the
Sample Clock
Source is
locked to
PXI_CLK10.
100 Hz 1 kHz 10 kHz
NI PXI-5421
Divide-by-N
–107 –121 –137 <1.2 ps rms
NI PCI-5421
Divide-by-N
–110 –127 –137 <2.0 ps rms
High-
Resolution
1
–109 –121 –123 <4.2 ps rms
NI PXI-5421
CLK IN
–111 –122 –135 <1.2 ps rms
NI PCI-5421
CLK IN
–113 –125 –135 <2.0 ps rms
NI PXI-5421
PXI Star
Trigger
2
–115 –118 –130 <3.0 ps rms
External
Sample Clock
Input Jitter
Tolerance
Cycle-Cycle Jitter ±300 ps
Period Jitter ±1 ns
—
Table 2. (Continued)
Specification Value Comments