Agilent E1470A - Manuals

12 Configuring the RF Switch Chapter 1 Creating Multiple Multiplexers You can configure the Cascade RF Switch module to create multiplemultiplexers of varying sizes. In its power-on/reset state, the switch isconfigured as 20 independent 3-to-1 multiplexers. By specifying a valid pathfrom a COM termi...

Configuring the RF Switch 13 Chapter 1 COM 04 can be used for a 15-to-1 multiplexer for all channels between 000and 042. COM 05 can be the common for all channels from 000 through 052creating an 18-to-1 multiplexer. Multiplexers of 21-to-1, 24-to-1, and 27-to-1can also be configured. Two 30-to-1 mul...

14 Configuring the RF Switch Chapter 1 Setting the Logical Address The logical address of the Cascade RF Switch module is set with the LogicalAddress (LADDR) switch on the module. The logical address is factory-setto 120. Valid addresses are from 1 to 256. See Figure 1-4 for address switchsettings. ...

Configuring the RF Switch 15 Chapter 1 Setting the Interrupt Request Level Interrupts are enabled at power-up, after a SYSRESET, or after resetting themodule via the Control Register (see Appendix B). If interrupts are enabled,the system generates an interrupt after writing to any relay control regi...

16 Configuring the RF Switch Chapter 1 Connecting User Wiring User wiring connections to the module are via multiple connector blocks(part number 1250-2563). Figure 1-6 shows how to wire and assemble theconnector housing. See “Cables and Connectors” for guidelines toassemble SMB jacks and connectors...

Configuring the RF Switch 17 Chapter 1 Cables and Connectors The Cascade RF Switch module is shipped with a kit of 85 SMB connectorjacks and 10 connector housings. You must supply your own 50 Ω double-shielded cable (single-shielded cable can also be used). Agilentrecommends RG188DS or RS316DS doubl...

18 Configuring the RF Switch Chapter 1 User Wiring Table Table 1-2 provides a log for you to document wiring to the Cascade RFSwitch module. See Figure 1-1 for terminal identification. See Figure 1-6 forguidelines to connect user wiring. You can copy the table as desired. Table 1-2. User Connections...

Programming the RF Switch 19 Chapter 2 Chapter 2 Programming the RF Switch Using This Chapter This chapter gives guidelines to program the Cascade RF Switch module(RF Switch) including: • Installing Device Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 • Addressing the Switch...

20 Programming the RF Switch Chapter 2 Addressing the Switch By specifying a path destination (a COM number) and a source (a channelnumber), a channel is connected to a COM terminal. The format foraddressing the switch is [ROUTe:]PATH[:COMMon] <comm>, <channel> where < comm > is a ...

Programming the RF Switch 21 Chapter 2 Programming Examples The following C-language programs show one way to verify initial operationfor the Cascade RF Switch module, to close signal paths, and to save andrecall module states. To run these programs, you must have installed theE1470A SCPI Device Dri...

Programming the RF Switch 23 Chapter 2 Example: Closing a Signal Path This program example closes a signal path from COM 01 to channel 010and verifies that the path is closed. #include <visa.h> #include <stdio.h> #include <stdlib.h>void err_handler(); void main() { int ch_closed;/*...

24 Programming the RF Switch Chapter 2 Example: Opening and Closing Signal Paths This program first closes a signal path from COM 01 to channel 011 andverifies that the path is closed. Next, the program closes a signal path fromCOM 02 to channel 010 (which opens the COM 01 to channel 011 path).Then,...

Programming the RF Switch 25 Chapter 2 err= viPrintf (rf_mux,"PATH:COMM? 02,01\n"); if (err < VI_SUCCESS) err_handler (rf_mux,err); err = viScanf (rf_mux,"%d",&ch_closed); if (err < VI_SUCCESS) err_handler (rf_mux,err); if (ch_closed == 1) printf ("Signal path 02,010 is...

RF Switch Command Reference 27 Chapter 3 Chapter 3 RF Switch Command Reference This chapter describes Standard Commands for ProgrammableInstruments (SCPI) and summarizes IEEE 488.2 Common (*)Commands applicable to the E1470A Cascade RF Switch Module. Command Types Commands are separated into two typ...

28 RF Switch Command Reference Chapter 3 For example, if the command syntax shows MEASure, then MEAS andMEASURE are both acceptable forms. Other forms of MEASure, such asMEASU or MEASUR will generate an error. You may use upper or lowercase letters. Therefore, MEASURE, measure, and MeAsUrE are allac...

RF Switch Command Reference 29 Chapter 3 DIAGnostic The DIAGnostic subsystem contains instrument-specific commands isare not recommended for general programming. For the E1470A, theDIAG subsystem allows you to open/close individual relays and queryindividual relays. Subsystem Syntax DIAGnostic :CLOS...

RF Switch Command Reference 31 Chapter 3 Comments Invalid Values. Values other than those listed in the table cause error: 2022, “Invalid relay number”. Opening Relays. To open single relays, use DIAG:OPEN abc. To open multiple relays, use DIAG:OPEN abc,def,ghi,... etc. 80 Relays Maximum. The E1470A...

36 RF Switch Command Reference Chapter 3 SYSTem The SYSTem subsystem returns error numbers and error messages inthe error queue of a module and the SCPI compliance year (version). Subsystem Syntax SYSTem :ERRor?:VERsion? SYSTem:ERRor? SYSTem:ERRor? returns the error numbers and corresponding error m...

RF Switch Command Reference 37 Chapter 3 IEEE 488.2 Common Commands Quick Reference The following table lists the IEEE 488.2 Common (*) Commandsaccepted by the E1470A module driver. For more information onCommon Commands, see the the ANSI/IEEE Standard 488.2-1987. Command Command Description *CLS Cl...

38 RF Switch Command Reference Chapter 3 SCPI Commands Quick Reference *WAI Wait to Complete. For the E1470A, the only pending operation is the time delay (approximately 16 msec) provided to allow the relays to settle. If this command waitslonger than about 60 msec, the error -240, “Hardware error” ...

RF Switch Specifications 39 Appendix A Appendix A RF Switch Specifications Configuration: 80 signal connections60 inputs (channel numbers xx0 through xx2)20 commons (channel numbers COMxx)One 60:1, two 30:1,... up to 20 3:1 multiplexers can be configured 3dB Bandwidth: 3:1 Multiplexer: 500 MHz 30:1 ...

Register-Based Programming 41 Appendix B Appendix B Register-Based Programming About This Appendix This appendix contains the information you can use for register-basedprogramming of the E1470A Cascade RF Switch module. The contentsinclude: • Register Addressing . . . . . . . . . . . . . . . . . . ....

42 Register-Based Programming Appendix B The Base Address When you are reading or writing to a module register, a hexadecimal ordecimal register address is specified. This address consists of a baseaddress plus a register offset. The base address used in register-basedprogramming depends on whether ...

Register-Based Programming 43 Appendix B A16 Address Space Outside the Command Module When the E1406 Command Module is not part of your VXIbus system, theE1470 base address is computed as: A16 base = C000 h + (LADDR h * 40 h ) or (decimal) A16 base = 49,152 + (LADDR * 64) where C000 h (49,152) is th...

44 Register-Based Programming Appendix B Reset and Registers When the E1470A undergoes power-on or a *RST in SCPI, the bits of theregisters are put into the following states. Manufacturer ID Register, DeviceType Register, and Status/Control Register are unaffected and RelayControl Registers have a “...

Register-Based Programming 45 Appendix B CAUTION Registers have been documented as 8-bit bytes. If you access them using16-bit transfers from a Motorola CPU, the high and low byte will beswapped. The E1406 uses Motorola CPUs. Motorola CPUs place thehighest weighted byte in the lower memory location ...

46 Register-Based Programming Appendix B Relay Control Registers These registers control the individual E1470A relays. When a “1” is writtento a bit, the relay controlled by that bit becomes SET (COMMON to NO).When a “0” is written to a bit, the relay controlled by that bit becomes RESET( common to ...

Register-Based Programming 47 Appendix B Writing to Relay Control Registers To set one or more relays write a “1” to the bit controlling that relay: 1. Determine the register and bit locations for the relays you want to set.2. Add the decimal values for each bit you want to set in a register.3. Use ...

Register-Based Programming 49 Appendix B Register Programming Example This example program reads the ID and Device Type registers and thenreads the Status register. Next, the program closes a signal path fromchannel CH031 to COM 05, writes the value 20480 (5000 hexadecimal) toregister 20 h and then ...

RF Switch Error Messages 53 Appendix C Appendix C RF Switch Error Messages The following error messages are unique to the E1470A. See theappropriate command module or VXI Controller module manual for a morecomplete list of possible error messages. Error Number Message Generated Description Commands ...

Index 55 Index E1470A Cascade RF Switch User’s Manual A addressing the RF switch, 20Agilent web site, 19 B base address, register, 42 C cables and connectors, 17cautions, 13command reference, SCPI, 28common commands *CLS, 37*ESE, 37*ESE?, 37*ESR?, 37*IDN?, 37*OPC, 37*OPC?, 37*RCL, 37*RST, 37*SAV, 37...