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The Trigger Source The trigger source parameter specifies the signal which triggers the
multimeter. The trigger source is set with the following command:
TRIGger:SOURce source
The source settings are:
BUS = trigger source is the HP-IB group execute trigger (GET) or the
system
*TRG command. Within the HP 75000 Series B mainframe, the
instrument whose trigger source is set to BUS and was the last instrument
addressed to listen will respond to the HP-IB group execute trigger. The
system trigger (
*TRG) is sent to a specific instrument
(i.e.
OUTPUT 70903;"*TRG").
EXT = trigger source is an external trigger applied to the multimeter’s
"External Trigger" BNC connector. The multimeter triggers on the
falling (negative-going) edge of a TTL signal.
When scanning with a FET multiplexer "switchbox" (multiplexers at a
different secondary HP-IB address),
TRIGger:SOURce EXT must be
selected in order to trigger the multimeter with the Channel
Closed/External Trigger line on the digital bus.
HOLD = suspends triggering. Once set, the multimeter can only be
triggered with the
TRIGger[:IMMediate] command.
IMMediate = an internal trigger signal is always present. Placing the
multimeter in the wait-for-trigger state (
INIT) causes it to be triggered.
MEASure and CONFigure set TRIGger:SOURce IMM. (MEASure also
executes
INIT.)
TTLTrg0 - TTLTrg7 = trigger source is VXIbus TTL trigger line 0 through 7.
These trigger sources are available with the HP E1411B multimeter only.
Querying the Trigger
Source
The trigger source is queried with the TRIGger:SOURce? command. See
Chapter 5 for additional information.
Chapter 4 Understanding the HP E1326B/E1411B Multimeter 103
- *E1326-90009* 1
- Contents 2
- WARNINGS 9
- Documentation History 9
- Safety Symbols 9
- DECLARATION OF CONFORMITY 10
- Multimeter 12
- Functional 13
- Description 13
- Electrical 13
- Physical 14
- Introduction to Operation 15
- Resetting the 16
- Making a 19
- Measurement 19
- Setting the Logical 21
- Address Switch 21
- Forming a Scanning 22
- VXIbus Interrupt 23
- Connecting the 24
- HP E1326B Adapter 24
- Installing the 25
- HP E1411B in a 25
- Mainframe 25
- Setting the Reference 26
- Frequency 26
- Querying the 26
- Reference Frequency 26
- Input Characteristics 27
- Connecting 29
- Multiplexers 29
- Analog Bus 30
- Connections at the 30
- Connecting Input Signals 31
- Connections 32
- E1460A E1346A 33
- E1345A/47A/51A/53A 33
- See Chapter 2 of the 34
- E1344A/47A/53A 35
- Carrier Cable Assemblies 36
- Additional Configurations 38
- Chapter 3 40
- About This Chapter 40
- Making a Single Measurement 41
- Scanning a Channel List 45
- Making Multiple Scans 46
- Making Multiple Paced Scans 47
- Multiple High-Speed Scans 53
- Maximizing Measurement Speed 55
- Changing the Data Format 57
- ENTER @Dmm USING 58
- ENTER when all ENTER 58
- HP 82335 HP-IB Interface Card 59
- MEM:VME:STAT ON), all 64
- Checking for Errors 65
- Additional Stand-Alone 68
- Multimeter Functions 68
- Additional Scanning 68
- Define I/O paths 70
- Subprogram Kaboom 70
- Clear and reset multimeter 72
- Clear and reset switch 72
- Send commands to multimeter 72
- Send commands to switch 72
- Get readings 72
- RESistance:OCOMpensated 76
- How to Make Measurements 77
- Making Measurements 78
- When Using CONFigure 78
- Data Formats and Destinations 79
- Destinations 80
- Example: Retrieving 83
- Data from Memory 83
- Destination = 83
- Shared Memory 83
- Destination 84
- Measurement Functions 85
- How Resistance is 86
- Measured 86
- Two-Wire vs. Four-Wire 86
- Thermocouple 88
- Specifying a 89
- Function 89
- Multimeter Parameters 90
- Autorange Setting 94
- 1.084540E+001 94
- Resolution 95
- Aperture and 96
- Integration Time 96
- Setting the Aperture 97
- Querying the Aperture 97
- Querying the Autozero 98
- Compensation 99
- Triggering the Multimeter 100
- Querying the Trigger 102
- Example: Setting a 106
- Trigger Delay 106
- Example: Setting 107
- Sample Count 107
- Querying the Sample 107
- Wait-For-Trigger 110
- Example: 111
- Measurements with a 111
- Single Trigger 111
- How to Save and 113
- Recall a 113
- Configuration 113
- Example: Saving and 114
- Recalling a 114
- Reference 116
- Abbreviated 117
- Commands 117
- SCPI Command Reference 120
- Subsystem Syntax ABORt 121
- Comments • 121
- CALibration 122
- :ZERO:AUTO 123
- :ZERO:AUTO? 123
- Querying the Autozero Mode 124
- CONFigure 125
- :FRESistance 126
- :RESistance 127
- :TEMPerature 128
- :VOLTage:AC 129
- :VOLTage[:DC] 131
- CONFigure? 133
- DIAGnostic 134
- :MONitor:CHANnel 135
- :MONitor:CHANnel? 136
- :MONitor[:STATe] 136
- :MONitor[:STATe]? 137
- Subsystem Syntax FETCh? 138
- Subsystem Syntax FORMat 139
- Parameters 139
- Comments 139
- REAL,+32 REAL 32 format 140
- REAL,+64 REAL 64 format 140
- INITiate 141
- Subsystem Syntax MEASure 142
- :FRESistance? 143
- :RESistance? 144
- :TEMPerature? 145
- :VOLTage:AC? 146
- :VOLTage[:DC]? 147
- :VME:ADDRess 149
- :VME:ADDRess? 149
- :VME:SIZE 150
- :VME:SIZE? 150
- :VME:STATe 151
- :VME:STATe? 151
- :TTLTrgn[:STATe] 152
- :TTLTrgn[:STATe]? 153
- Subsystem Syntax READ? 154
- Subsystem Syntax SAMPle 156
- :SOURce? 158
- [SENSe:] 160
- FUNCtion 161
- FUNCtion? 161
- RESistance:APERture 162
- RESistance:APERture? 163
- RESistance:NPLC 163
- RESistance: OCOMpensated? 164
- RESistance:RANGe 165
- RESistance:RANGe? 166
- RESistance:RANGe :AUTO 166
- RESistance:RANGe:AUTO? 167
- RESistance:RESolution 167
- RESistance:RESolution? 168
- VOLTage:AC:RANGe 168
- Example Changing the Range 169
- VOLTage:APERture 170
- VOLTage:APERture? 170
- VOLTage[:DC]:RANGe 171
- VOLTage[:DC]:RANGe? 172
- VOLTage:NPLC 172
- VOLTage:NPLC? 173
- VOLTage:RANGe:AUTO 173
- VOLTage:RANGe:AUTO? 174
- VOLTage:RESolution 174
- VOLTage:RESolution? 175
- :CDEScription? 176
- Subsystem Syntax TRIGger 178
- :DELay:AUTO? 181
- :DELay:AUTO 181
- [:IMMediate] 182
- Querying the Trigger Source 184
- Synchronization 185
- Command Quick Reference 186
- Select range 187
- Specifications 188
- DC Voltage 189
- (volts) 190
- For Offset 191
- µV 30 µV 61 µV 193
- Messages 196
- Code Message Cause 197
- HP E1326B/E1411B Multimeter 198
- Register-Based Programming 198
- Accessing the 201
- Registers 201
- Register Descriptions 202
- The Command and 203
- Parameter Registers 203
- – ID Register (base + 00 204
- – Status Register (base + 04 204
- – Data Buffer (base + 0C 204
- The Device Type 205
- Register 205
- The Query 206
- Response Register 206
- Four-Byte Reading 207
- Two-Byte Reading 207
- Converting Four-Byte 208
- Program Timing and Execution 209
- Configuring the 210
- Retrieving 212
- Measurements 212
- – Command Register (base + 08 213
- Comments 214
- • The registers used are: 214
- Using a Multiplexer 215
- Register Triggering 216
- Triggering Model 217
- Programming Examples 219
- HP BASIC/WS 220
- C Version 221
- HP BASIC/WS Version 222
- HP BASIC/WS Version 233
- Continued on Next Page 234
- == 0x91) 238
- Useful Tables 261
- Register-Based 263
- Programming Error 263
- Power-On Settings 264
- Function and 265
- Aperture Change 265
- Bit Decimal 266
- Interrupt 266
- Appendix D 268
- Decrease Aperture 274
- Temperature 275
- Reserves room for 1000 four 276
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