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HP FET MULTIPLEXER E1351A/53A Bus Triggering, Example: Scanning, Using Stand-Alone, Multimeter and Digital

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Example: Scanning

Using Stand-AloneMultimeter and DigitalBus Triggering

This example is similar to the previous one except that the multimeter’s "External Trigger" and "Voltmeter Complete" ports are connected to the "Channel Closed" and "Channel Advance" on the FET Multiplexer digital bus. See Chapter 1 for information on making custom digital bus cables. Once the scanning procedure has been initiated (INIT), the channel closure is advanced by the handshake lines. The INIT command closes the first channel, and when the channel is closed, the "Channel Closed" pulses. This is connected to the "External Trigger" on the multimeter, which triggers a reading. When the reading is complete, the "Voltmeter Complete" triggers, which pulses the "Channel Advance". This procedure continues until the end of the scan list.

The sequence of operation is:

1.TRIG:SOUR DBUS selects digital bus triggering.

2.INIT (line 50) closes channel number 100.

3.The channel closure causes a trigger output from the "Channel Closed" port.

4.The trigger causes the multimeter to make a measurement.

5.Measurement result is stored into multimeter memory.

6.Trigger is output from multimeter’s "Voltmeter Complete" port.

7.Trigger to "Advance Channel" port advances the channel list to the next channel.

8.Steps 3-7 are repeated for channels 101 through 115.

10 OUTPUT 722;"TRIG EXT;DCV;MEM FIFO"

!Sets multimeter to external trigger to measure dc volts and store readings

20OUTPUT 70914;"SCAN:PORT ABUS"!Routes channels to analog bus connector and A tree terminal

30OUTPUT 70914;"TRIG:SOUR DBUS"!Sets switchbox to receive external triggers

40OUTPUT 70914;"SCAN (@100:115)" !Selects the channel list (channels 100 to 115)

50	OUTPUT 70914;"INIT"	!Starts scanning cycle
60	END

50 Understanding the HP E1351A/53A FET Multiplexer Modules

Chapter 4

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