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Appendix A
Specifications
©
National Instruments Corporation
A-5
PXI Trigger Characteristics
PXI_TRIG <0..7> to
PXI_TRIG <0..7> output skew
at NI PXIe-6672 backplane connector ... 5 ns, typical
Asynchronous delay, t
pd
PXI_TRIG <0..7> to
PFI <0..5> output ............................ 15 to 22 ns, typical
TCXO Characteristics
Frequency............................................... 10 MHz
Initial accuracy ....................................... ±2.5 ppm
Long-term stability (1 year)
1
.................. ±1 ppm
Temperature stability (0 to 55 °C)
2
........ ±2 ppm
DDS Characteristics
Frequency range ..................................... 1 Hz to 105 MHz
Frequency resolution.............................. < 0.075 Hz
Frequency accuracy................................ Equivalent to PXI_CLK10
accuracy
3
Physical
Chassis requirement ............................... One 3U PXI Express
System Timing Slot
Front panel connectors ........................... SMB male, 50
Ω
Front panel indicators............................. Two tricolor LEDs
(green, red, and amber)
1
Includes stability of TCXO and supporting circuitry.
2
Includes temperature stability of TCXO and supporting circuitry.
3
The DDS frequency inherits the relative frequency of PXI_CLK10. For example, if you route the TCXO to PXI_CLK10,
the DDS output inherits the same relative frequency accuracy as the TCXO output.