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Agilent 34980A and L4445A Configuring an RF/Microwave Switch System Application NoteAgilent TechnologiesContentsIntroduction 2Overview of 34980A RF/Mi

6. Choose a switching sub-systemthat is easy to configure, verify,and provides the capacity toexpand your test system in thefuture. How you control ex

A test system with manyFailsafe-type switches requiresa significant amount of currentto maintain switch closures.Some RF /Microwave SwitchDrivers can

Position feedback is often astandard feature with Agilentswitches, because the construc-tion of the switch drive signalscan also feed back information

34945EXT Distribution Board Configuration Steps to select and configurethe 34945EXT associated distribution boards, relays,attenuators & cabling:I

14Table 1. Agilent Switch/Attenuator to Y115x Distribution BoardAgilent Recommended Switch Options Description Frequency 34945EXT Distribution Boa

15Table 1. Agilent Switch/Attenuator to Y115x Distribution Board (Continued)Agilent Recommended Switch Options Attenuator Frequency 34945EXT Distrib

16Table 2. Agilent Switch to Y1155 Distribution BoardAgilent Recommended Options Description Frequency 34945EXT Distribution Board Model Coil Indi

Tables 1-7 will describe which kits are appropriate for the various switches and attenuators.Agilent Y1157A Cable Kit• 9 to 10-pin cable kit for Y1150

Table 3. The Y1150A Distribution BoardY1150A Switch optionsCoil voltage (24 V) 124Position feedback 402Connector type (9-pin) 201Switch types: N1810U

Table 4. The Y1151A Distribution BoardY1151A Switch optionsCoil voltage (24 V) 024Position feedback Comes StandardConnector type (16-pin) 161Switch t

IntroductionLAN (Ethernet) is fast becomingthe basis for a new set ofinstrumentation called LXI, or LAN eXentions for Instru-mentation. LXI is a colle

Table 5. The Y1152A Distribution BoardY1152A Switch optionsCoil voltage (24 V) Comes StandardPosition feedback Comes StandardConnector type (16-pin)

Table 6. The Y1153A Distribution BoardY1153A.1 Switch optionsCoil voltage (24 V) 024Position feedback Comes StandardConnector type (10-pin) Comes Sta

The Agilent 8494/5/6 attenua-tors come standard with aViking connector and a Vikingto bare wire cable. The Agilent8490x attenuators use a 10-pinsocket

Table 7. The Y1154A Distribution BoardY1154A Switch optionsCoil voltage (24 V) Comes StandardPosition feedback Comes StandardConnector type (10-pin)

Custom Switching and the34945A/L4445A Switch DriverThe Y1150A through Y1154Aprovide very specific solutionsfor connecting to a wide rangeof Agilent sw

The 34945EXT only supportsCommon Positive coil drive, soyou must connect the commonconnection on the switch to the +VR lines on the Y1155A,and the swi

Example 34945A/L4445A Switch Driver ConfigurationsThe following two examplesshould give you a pretty goodidea of how to configure a typical RF/Microwa

Here is a possible Agilent34980A configuration with discussion points:• 34980A Switch/Measure Unit• (1) 34945A Switch/Attenuator Driver w/cable • (3)

The Web Server Diagnostic ToolThe 34980A/L4445A has abuilt-in Web Server that provides a very powerful configuration, diagnosis, andverification tool.

When developing test systemprograms, you can open up aWeb Browser to the 34980A/L4445A, and you can observeswitches closing and configura-tions changi

However, you may need to rapidly deploy customRF/Microwave Switch solutionsfor your testing needs, so youneed to be in control of leadtimes and costs

A switch executive is an external software package that provides the following features: • Switch management and report generation• Creating switch pa

ConclusionYou have been introduced to a number of 34980A/L4445Acapabilities related toRF/Microwave switching. You have gained a betterunderstanding of

www.agilent.com/find/emailupdatesGet the latest information on the products and applications you select. www.agilent.com/find/agilentdirectQuickly cho

Using RF and Microwave ModulesUsing 34980A mainframe modules to construct your high frequency test system has the following attributes:Benefits:• Conv

Overview of 34945A/L4445RF/Microwave/Attenuator DriverThe 34945A/L4445A MicrowaveSwitch/Attenuator driver isdesigned to support virtuallyany RF/Microw

The previous figure showssome key aspects of the34945A/L4445A Switch Driver:• Each 34945A/L4445A module can supply 24 V to the first 34945EXT• Daisy c

A disadvantage of continuousdrive switches is they maychange performance due topower dissipation in the switch housing. This can leadto deviations in

Frequency rangeThe top frequency limits ofswitches are set by the size of the coaxial structure andconnectors. SMA connectorsoperate from DC to 20 GHz

Termination At high frequencies, all signalsmust be properly terminated.With improper termination(open end or mismatchedimpedance), signals can berefl