26
Using the Adapters
Chapter 3
SUMBUS Configurations (HP E1407A Only)
Disconnecting
the SUMBUS
The ribbon cable and a pair of jumpers connect the SUMBUS to the output
connectors (i.e., to the B-Size Module). Use Figure 3-9 to disconnect
(i.e., remove the jumpers) or connect the SUMBUS.
Adding Buffer
Circuitry to the
SUMBUS
The adapter module has no circuitry available to buffer the SUMBUS.
However, there is a breadboard area on the PC board in the HP E1407A
Adapter that allows you to add your own circuitry (e.g., op-amps) to provide
buffering for the SUMBUS. The breadboard area also includes connections
to the
±
12 V Power Supplies.
You can add buffer circuitry either for SUMBUS signals coming from the
B-Size Module in the Adapter Module or from the Mainframe’s VXI
Backplane. Use Figure 3-9 to select the appropriate jumpers for your
application, and to locate the breadboard area.
Figure 3-9. SUMBUS Jumper Configurations
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