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HP FET MULTIPLEXER E1351A/53A Understanding the HP E1351A/53A FET Multiplexer Modules, Commands for Scanning Switchbox Channels, Using Scanning Trigger Sources, Using This Chapter

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Chapter 4

Understanding the HP E1351A/53A FET Multiplexer Modules

Using This Chapter

This chapter explains techniques to scan the channels of 16-Channel FET and 16-Channel Thermocouple FET Multiplexer Modules. This chapter contains the following sections:

∙ Commands for Scanning Switchbox Channels . . . . . . . . . . . Page 45 ∙ Using Scanning Trigger Sources . . . . . . . . . . . . . . . . . . . . . . Page 45 ∙ Using the Scan Complete Bit. . . . . . . . . . . . . . . . . . . . . . . . . Page 52

Commands for Scanning Switchbox Channels

Scanning multiplexer channels consists of closing a set of channels, one at a time. The multiplexer has single, multiple, or continuous scanning modes. See Figure 4-1 for the different commands used in scanning.

Using Scanning Trigger Sources

Scanning with External Instruments

The TRIGger:SOURce command specifies the source to advance the channel list. Figure 4-2 shows the different trigger sources. TRIG:SOUR DBUS uses the digital bus handshake lines. You can use the TRIG[:IMM] command to immediately advance the channel list while in the TRIG:SOUR BUS or TRIG:SOUR HOLD mode. (Note that TRIG:SOUR IMM is not the same as TRIG[:IMM].) To enable the HP E1300/E1301 Mainframe "Trig Out" port, use the OUTP ON command. The "Event In" mainframe trigger source is reserved with the TRIG:SOUR EXT command. "Trig Out" and "Event In" are mainframe resources, and can only be allocated to one instrument at a time.

The examples in this chapter show different ways to scan channels of a switchbox in an HP E1300/E1301 Mainframe. The operation is similar to other HP VXIbus mainframes with HP command modules that have "Trig Out" and "Event In" ports. The computer used in the examples is an HP Series 200/300 used with HP BASIC as the program language. The computer interfaces with the mainframe over HP-IB. Assumed is an:

∙HP-IB select code of 7

∙HP-IB primary address of 09 for the HP E1300/E1301 Mainframe

∙HP-IB primary address of 22 for the HP 3457A Multimeter

∙HP-IB secondary address of 14 for the multiplexer module

Chapter 4

Understanding the HP E1351A/53A FET Multiplexer Modules 45

Contents

Contents Page Page Page Page Page July 20 Page Reader Comment Sheet BUSINESS REPLY MAIL HEWLETT-PACKARDCOMPANY Page Getting Started with the HP E1351A/53A Using This Chapter FET Multiplexer Module Description Multimeter Connection Points Analog Bus Connector Page Switchbox and Scanning Voltmeter Configurations Digital Bus and Triggering Programming Language Initial Operation Configuring the HP E1351A/53A FET Multiplexer Modules Warnings and Cautions Multiplexer Card Numbers Setting the Address Switch Selecting the Interrupt Line Number Setting the Card ID Switch Connecting User Inputs Adding Signal Conditioning Components/Current Shunts Connecting Field Wiring Wiring a Terminal Module Connecting Multimeters and Signal Generators Analog Bus and Digital Bus Cables Page Using the HP E1351A/53A FET Multiplexer Modules Selecting Channels Page Multiplexer Commands Connecting Switchbox Channels to Direct Terminals Comments Connecting Switchbox Channels to Tree Terminals for Making Measurements Page Scanning a Range of Switchbox Channels Page Example: Making 2-WireOhms Measurements by Scanning Example: Making 4-WireOhms Measurements by Scanning Downloading a Scan List Scanning a Switchbox without a Downloaded Scan List Scanning a Switchbox with a Downloaded Scan List Scanning Voltmeter Configuration with HP E1326B Measuring Temperature Using Thermocouples (HP E1353A Module only) Comments Understanding the HP E1351A/53A FET Multiplexer Modules Commands for Scanning Switchbox Channels Using Scanning Trigger Sources Page Page Example: Scanning with External Instruments Using "Trig Out" and "Event In" Ports Using Stand-Alone Multimeter and Digital Bus Triggering Using Scanning Voltmeter Configuration and Digital Bus Triggering Using the Scan Complete Bit HP E1351A/53A 16-ChannelFET Multiplexer Command Reference Command Types Common Command Format SCPI Command Format Command Separator Abbreviated Commands Implied Commands Note SCPI Command Reference ABORt ARM DISPlay :MONitor:CARD :MONitor[:STATe] Monitoring Switchbox Channels: Selecting the Module to be Monitored: Monitor Mode on an HP 1301 Mainframe Display: Example Enabling the Monitor Mode INITiate Example Enabling Continuous Scans :CONTinuous Example Query Continuous Scanning State Starting the Scanning Cycle: ∙Stopping Scanning Cycles: See the ABORt command OUTPut [ROUTe:] Example Closing Multiplexer Channels CLOSe ∙ Query is Software Readback: The [ROUTe:]CLOSe? command Example Query Multiplexer Channel Closure OPEN Opening Multiplexer Channels OPEN ∙ Query is Software Readback: The [ROUTe:]OPEN? command Query Multiplexer Channel Open State SCAN ∙Scanning Operation: With a valid channel list Stopping Scan: Example Scanning Using External Instruments SCAN:MODE Order of Command Execution: Mode Description: Selecting the 4-Wire SCAN:MODE Example Query Scan Mode SCAN:PORT port Example Selecting the ABUS Port SCAN:PORT Example Query Scan Port SETTling[:TIME] Digital Bus Handshaking: Example Setting 16 μsec SETTling TIME SETTling[:TIME] Example Set and Query the SETTling TIME STATus :OPERation:ENABle SYSTem :CDEScription :CTYPe :ERRor TRIGger :SOURce ∙ Enabling the Trigger Source: The TRIGger:SOURce command Using the Using Digital Bus Trigger: Using External Trigger Inputs: Example Scanning Using External Triggers Scanning Using Bus Triggers :SOURce Example Query Trigger Source IEEE 488.2 Common Commands Command Quick Reference Page HP E1351A/53A FET Multiplexer Specifications Page HP E1351A/53A Register-Based Programming About This Appendix Register Addressing Page The Base Address A16 Address Space Outside the Command Module or Mainframe Register Descriptions Page Register Bit Descriptions Manufacturer ID Register Status/Control Register Scan Control Register Scan Channel Delay Register Scan Channel Configuration Register Configuration Bit (C1 - C0) Executing Commands OUTPut [ROUTe:] SYSTem TRIGger Register-BasedProgramming for Maximum Speed VLD A_D B_D decimal code: Page Multimeter Command and Parameter Opcodes Page Register-Based Programming Error Codes HP E1351A/53A FET Multiplexer Error Messages Page Index