18
Appendix: Older Revision Backplane Clock Jumper Settings (AT4000 REV B)
The AT4000 REV B backplane uses jumpers instead of switches to control MASTER/SLAVE clock
selection.
Figure 17:AT4000 REV B Backplane
Figure 18:AT4000 REV B cable connection options between backplanes
To set MASTER/SLAVE, refer to the following table:
U450 is
MASTER
U451 is
MASTER
U452 is
MASTER
U453 is
MASTER
All U45x
SLAVE
U3
0
0
1
1
0
U5
1
1
0
1
1
U7
1
1
0
0
0
U12
1
1
1
1
0
U13
0
1
0
0
0
