Keysight M9383A Startup Manual page 39

Set the M9018B/M9019A chassis controller slot power supply switch to the
2.
right-hand position. This provides power to slot 1 for the benefit of the
M9021A card.
On the M9021A module, set both S301 switches to the "Host" (right-hand)
3.
position and set the S201 rocker switch to the left-hand position. Refer to
the following figure for M9021A switch locations and positions.
39 Keysight M9383A PXIe Vector Signal Generator