National Instruments NI 6601, User Manual

Page: 21 / 60

Chapter 2 Device Overview
NI 660x User Manual 2-10 ni.com
Slot 2, the chassis disables its internal clock, then u ses the OCXO clock
instead, ill u strated in Fig u re 2-7.
Note The PXI CLK10 in pin is u sed as the PXI Star pin in other slots. The PXI Star pin is
not u sed for the PXI backplane clock.
Figure 2-7. OCXO as the 10 MHz PXI Backplane Clock
TIO(0)
NI PXI-6608 in Slot 2
of PXI Chassis
80 MHz Phase Locked to
10 MHz PXI Backplane Clock
TIO(1)
10 MHz
OCXO
10 MHz
Circuit
toDrive
10MHz
PXI
Backplane
Clock
80 MHz
VCXO
Phase
Lock
Loop
10 MHz PXI Backplane Clock
10 MHz from OCXO is Used as
10 MHz PXI Bac
kplane Cloc
k
PXI Backplane
PXI CLK10 in
(Driving
10 MHz
Supplied by
OCXO)
TIO(0)
NI PXI-6608 or NI PXI-6602
in Slot 3 of PXI Chassis
80 MHz Phase Locked to
10 MHz PXI Backplane Clock
TIO(1)
10 MHz
OCXO
80 MHz
VCXO
Phase
Lock
Loop
10 MHz PXI Backplane Clock
PXI Star
(Not Used
for
Backplane
Clock)