Agilent Technologies E1470A Creating Multiple Multiplexers, Configuring the RF Switch Chapter

Page 12

Creating Multiple Multiplexers

Channel

(BB)0

(BB)1

(BB)2

(BB)0

(BB)1

(BB)2

(BB+1)0

(BB+1)1

(BB+1)2

(BB+2)0

(BB+2)1

(BB+2)2

You can configure the Cascade RF Switch module to create multiple multiplexers of varying sizes. In its power-on/reset state, the switch is configured as 20 independent 3-to-1 multiplexers. By specifying a valid path from a COM terminal to a channel in a different bank (functionally cascading contiguous 3-to-1 multiplexers) other multiplexer sizes can be configured.

Figure 1-3 shows typical 3-to-1, 6-to-1, 9-to-1, and 12-to-1 multiplexers. Other sizes can be configured by specifying valid ROUTe:PATH statements (see Chapter 2 for details). See Figure 1-2 for channel and COM numbering information.

	3-to-1
	3-to-1	Multiplexer
	Multiplexer	Multiplexer
		COM (BB)

(BB)0

(BB)1

(BB)2

COM (BB+1)

(BB+1)0

(BB+1)1

(BB+1)2

9-to-1	12-to-1
Multiplexer	Multiplexer

(BB)0

(BB)1

(BB)2

(BB+1)0

(BB+1)1

(BB+1)2

COM (BB+2)

(BB+2)0

(BB+2)1

(BB+2)2

COM (BB+3)

(BB+3)0

(BB+3)1

(BB+3)2

Figure 1-3. Creating Multiple Multiplexers

NOTE Generally, the COM terminal is on the highest-numbered bank. Exceptions are that channels 100 through 132 can go to COM 05 as well as to COM 13 and channels 300 through 332 can go to COM 25 as well as to COM 33.

For example, COM 01 can be used as the common for channels 000 - 002 and 010 - 012 creating a 6-to-1 multiplexer. COM 11 can be the common for channels 100 - 102 and 110 - 112 for another 6-to-1 multiplexer. COM 02 can be common for channels 000 - 002, 010 - 012, and 020 - 022 for a 9-to-1 multiplexer. COM 03 can be the common for channels 000 - 002, 010 - 012, 020 - 022, and 030 - 032 for a 12-to-1 multiplexer.

12 Configuring the RF Switch

Chapter 1

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Contents E1470-90002 Page Contents Appendix C RF Switch Error Messages Index Agilent Technologies Warranty Statement Government Restricted RightsSafety Symbols Documentation HistoryManufacturer’s Name Manufacturer’s AddressDeclares, that the product Product Name Model NumberPage Using This Chapter Switching DiagramChapter Cascade Relays COM 33 332 Configuring the RF Switch Chapter Creating Multiple MultiplexersRF Switch Configuration Maximum POWER. The maximum RF power that can be appliedChapter Configuring the RF Switch On this moduleSetting the Logical Address Setting the Interrupt Request Level Connecting User Wiring Installing User Wiring Configuring the RF Switch ChapterAssembling SMB Connector Jacks SMB Connectors and Connector HousingsUser Connections Wiring Installing Device Drivers RF SwitchAddressing the Switch Programming the RF Switch ChapterChapter Programming the RF Switch Programming ExamplesProgramming the RF Switch Chapter Example Closing a Signal Path Example Opening Closing Signal Paths Example Saving Recalling Module States Programming the RF Switch Chapter Command Types Common Commands FormatScpi Commands Format Chapter RF Switch Command ReferenceScpi Command Reference Linking CommandsRF Switch Command Reference Chapter DIAGnostic DIAGnosticCLOSeDIAGnosticCLOSe? DIAGnosticOPENDIAGnosticOPEN relay,relay... opens individual relays on Reset to its power-on state Common to NCDIAGnosticOPEN? DIAGOPEN333DIAGnosticRELAY? RSTDIAGThis programCLOS042,043,053,054,256REL?returnsROUTe ROUTePATHCOMMonExample Closing Channel Path 10002 SYSTemERRor? SYSTemSYSTemVERSion? Ieee 488.2 Common Commands Quick Reference CommandCommands Quick Reference DescriptionAppendix a RF Switch Specifications Appendix aRF Switch Specifications Appendix a Appendix B About This AppendixRegister Addressing Addressing OverviewBase Address Figure B-1. Register Address Locations Within VXI A16A16 Address Space Outside the Command Module Register Definitions Table B-1. General Register-based Programming MethodTable B-2. Register Map Register-Based Programming Appendix BTable B-3. Status Register Bit Patterns read Table B-4. Control Register Bit Pattern writeRelay Control Registers Vxie Table B-10. Writing to Relay Control Registers Register Programming Example Create and open a device sessionWait 5 seconds before resetting module Void errhandler /* Error Handling Routine Register-Based Programming Appendix B Appendix C RF Switch Error Messages Appendix CRF Switch Error Messages Appendix C Index IndexIndex E1470-90002