Supported Switches
U2121A-101 Operating Guide
The U2121A- 101A supports three types of Agilent RF switches as
shown in
Table
9. User can choose to drive the same switches in all
five channels or a mixture of three switches for five channels.
However, only one type of switch can be used in a channel at a time.
Do not use multiple types of switches in the same channel.
Drive modes
The RF switch driver board drives the switches using the open
collector drive method. It provides a current path to the ground when
asserted.
H
DO
Channel
L
Continuous Drive
Continuous drive method controls the switches by activating the
control bit and holds it until it is disabled. This mode will have a
consistent current draw when the switch is activated.
Output
enable
Drive ChA
Drive ChB
Drive activated
Drive active
Drive active
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