Chapter 3
Hardware Overview
©
National Instruments Corporation
3-11
NI PXI-6682 User Manual
I/O Considerations
Using the Ethernet Port
The NI PXI-6682 provides one standard RJ-45 connection for
Ethernet communication. This port auto negotiates to the best possible
speed—10 Mbps or 100 Mbps. The Ethernet port is auto-MDI capable,
which means crossover cabling is not necessary when connecting the
NI PXI-6682 to another network card. The NI PXI-6682 senses whether a
crossed connection is needed and performs the action internally. The
Ethernet port also allows for full duplex operation, so traffic can be sent and
received at the same time.
Table 3-6.
Sources and Destinations for NI PXI-6682 Signal Routing Operations
Sour
ces
Destinations
Front Panel
Backplane
Fr
on
t P
a
n
el
CLKOUT
PFI <0..2>
PXI_
CLK10_IN
PXI_Star
Trigger
<0..12>
PXI TRIG
<0..7>
CLKIN
✓
a
✓
a
✓
✓
a
✓
a
PFI <0..2>
✓
✓
b
✓
B
a
ckplane
PXI_ CLK10
✓
✓
✓
✓
PXI_STAR <0..12>
✓
b
✓
✓
PXI TRIG <0..7>
✓
✓
✓
Onboard
TCXO
✓
✓
a
✓
✓
a
✓
a
Time-synchronized
events and clocks
✓
✓
✓
a
Can be accomplished in two stages by routing source to PXI_CLK10_IN, replacing PXI_CLK10 with PXI_CLK10_IN
(occurs automatically in most chassis), and then routing PXI_CLK10 to the destination. The source must be 10 MHz.
b
Asynchronous routes between a single source and multiple destinations are very low skew. See Appendix A,
Specifications
,
for details.
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