Supported Switches
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
Drive activated
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 active
Drive ChB
Drive active
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