National Instruments NI PXI-665 Series, User Manual

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Chapter 3 Hardware Overview
Determining Sources and Destinations
All signal routing operations can be characterized by a
source
(input) and a
destination
. In
addition, synchronous routing operations must also define a third signal known as the
synchronization clock
. Refer to the
Choosing the Type of Routing
section for more information
on synchronous versus asynchronous routing.
Table 3-4 summarizes the sources and destinations of the NI PXI-665
x
. The destinations are
listed in the horizontal heading row, and the sources are listed in the column at the far left. A

in a cell indicates that the source and destination combination defined by that cell is a valid
routing combination.
Table 3-4. Sources and Destinations for NI PXI-665 x Signal Routing Operations
Destinations
So
ur
c
e
s
Front Panel Backplane Onboard
Fr
ont
P
a
n
e
l
CLKOUT PFI <0..5>
PXI_
CLK10_IN
PXI_Star
Trigger
<0..12>
RTSI/PXI
TRIG
<0..7>
OCXO/
TCXO
Reference
PLL
CLKIN 
†

†
  
†

PFI <0..5>
(NI PXI-6651
0..1 Only)
  
Bac
k
plane
PXI_ CLK10    
PXI_STAR
<0..12>
  
RTSI/PXI
TRIG <0..7>
  
On
boa
rd
OCXO or
TCXO
(NI PXI-6653
and
NI PXI-6652
Only)
  †   †  †
DDS
(NI PXI-6653
and
NI PXI-6652
Only)
   
Global
Software
Trigger
  
†
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.