Backplane, 10 mhz system reference clock (10 mhz ref) – National Instruments NI PXI-1056 User Manual
Page 42
Appendix A
Specifications
A-6
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Backplane
Size .........................................................3U/6U-sized; one 3U system slot
(with three system expansion
slots) and 17 3U peripheral slots,
or any combination up to
7 6U cards and 3U cards.
Compliant with IEEE 1101.10
mechanical packaging.
PXI Hardware Specification,
Revision 2.2 compliant.
Accepts both PXI and
CompactPCI (PICMG 2.0 R 3.0)
3U and 6U modules.
V(I/O)
1
....................................................+5 V
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 (10 MHz REF)
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.......................................Slot 2 J2 (pin D17; refer to
Table B-4,
Pinout for the Star Trigger Slot
Input frequency................................10 MHz ±100 ppm or better
Input amplitude
Slot 2 ........................................5 V or 3.3 V, 10 MHz TTL signal
1
V(I/O) is connected to the +5 V DC power plane, so the same specs apply to V(I/O) and +5 V.