Appendix A
Specifications
©
National Instruments Corporation
A-7
NI PXI-1042 Series User Manual
Backplane
Size......................................................... 3U-sized; one system slot (with
three system expansion slots) and
seven peripheral slots.
Compliant with IEEE 1101.10
mechanical packaging.
PXI Specification Revision 2.0
compliant.
Accepts both PXI and
CompactPCI (PICMG 2.0 R 3.0)
3U modules.
Backplane bare-board material .............. UL 94 V-0 Recognized
Backplane connectors ............................ Conforms to IEC 917 and
IEC 1076-4-101, and are
UL 94 V-0 rated
10 MHz System Reference Clock (PXI_CLK10)
Maximum clock skew
between slots .......................................... 250 ps
Built-in 10 MHz clock
Accuracy ......................................... ±25 ppm (guaranteed over the
operating temperature range)
Maximum jitter ............................... 5 ps RMS in 10 Hz to 1 MHz
range
External clock sources
Connectors ...................................... BNC on rear of chassis (ground
referenced) or Slot 2 J2 (pin D17;
refer to Table B-4,
Connector Pinout for the Star
Trigger Slot
Input frequency ............................... 10 MHz ±100 ppm or better
Input amplitude
Rear connector ......................... 200 mV
pp
to 5 V
pp
, 10 MHz
squarewave or sinewave
Slot 2........................................ 5 V or 3.3 V, 10 MHz TTL signal
