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Supported switches – Agilent Technologies Agilent RF Switch Driver Board U2121A-101 User Manual

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U2121A-101 Operating Guide

19

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.

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.

Drive activated

H

L

DO
Channel

Output
enable

Drive ChA

Drive ChB

Drive active

Drive active

U2931A Operating Guide.book Page 19 Tuesday, June 10, 2008 10:17 AM