Chapter 3
Configuration and Default Settings
VXIpc 770/870B Series User Manual
3-8
ni.com
4.
Run your software configuration utility to re-adjust the
VXIpc 770/870B Series configuration.
5.
After saving the configuration, exit Windows and power off the
computer.
6.
Change jumper W1 to the default position, as shown in Figure 3-7a.
7.
Power on the computer. If the computer does not boot with this
configuration, you will need to repeat these steps, modifying your
configuration until a final configuration is reached.
CLK10 Source Routing and Termination
When the VXIpc 770/870B Series is installed in Slot 0 of your mainframe,
it supplies the VXIbus CLK10 signal. The VXIpc 770/870B Series can use
two different sources to generate this signal—an onboard oscillator or an
external oscillator connected through the CLK SMB connector. You can
select the internal or external clock source by setting switch S1 as shown in
Table 3-1. The VXIpc 770/870B Series can also be configured to drive the
external CLK10 SMB with the VXIbus CLK10 signal. Use the hardware
configuration in MAX to route the CLK10 signal to the SMB connector.
A 50
Ω
termination option is available in MAX to terminate an external
CLK10 source. The 50
Ω
termination option has no effect when the internal
oscillator is selected as the CLK10 source.
Figure 3-8.
CLK10 Source
Note
Table 3-1 and Figure 3-8 are in agreement. Figure 3-8a shows the switch position for
shorting pins 1 and 2. Figure 3-8b shows the switch position for shorting pins 2 and 3.
a. CLK10 Source =
Internal Oscillator
b. CLK10 Source =
External Oscillator
S1
S1
1 2 3
1 2 3
