External clock source – National Instruments PXI Express NI PXIe-1065 User Manual
Page 49
Appendix A
Specifications
A-8
ni.com
Maximum jitter .......................................3 ps RMS phase-jitter
(10 Hz–12 kHz range)
2 ps RMS phase-jitter
(12 kHz–20 MHz range)
Duty-factor for PXIe_CLK100...............45%–55%
Absolute single-ended voltage swing
(When each line in the differential pair
has 50 W termination to 1.30 V
or Thévenin equivalent)..........................400–1000 mV
Note
For other specifications refer to the PXI-5 PXI Express Hardware Specification.
External 10 MHz Reference Out (BNC on rear panel of
chassis)
Accuracy .................................................±25 ppm max. (guaranteed over
the operating temperature range)
Maximum jitter .......................................5 ps RMS phase-jitter
(10 Hz–1 MHz range)
Output amplitude ....................................1 V
PP
±20% square-wave
into 50
Ω
2 V
PP
unloaded
Output impedance...................................50
Ω ±5 Ω
External Clock Source
Frequency ...............................................10 MHz ±100 PPM
Input amplitude
Rear panel BNC...............................200 mV
PP
to 5 V
PP
square-wave
or sine-wave
System timing slot
PXI_CLK10_IN ..............................5 V or 3.3 V TTL signal
Rear panel BNC input impedance ..........50
Ω ±5 Ω
Maximum jitter introduced
by backplane ...........................................1 ps RMS phase-jitter
(10 Hz–1 MHz range)