User`s manual

new jumpers in the new priority location (Figure 2-4 shows a priority
change from 1 to 7). Set the interrupt priority level to the interrupt handler
level of the module’s commander. The E1300/E1301 commander always
handles all interrupt levels. The E1405/E1406 and the E1499A
commander’s default is to handle interrupt level 1, however, they may be
configured to handle any combination of interrupt levels.
24 Configuring the Agilent E1346A Multiplexer Module Chapter 2