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76 L4400 User’s Guide
3 Operating and Programming
• You can store at least 500,000 readings in memory and all readings
are automatically time stamped. If memory overflows, the new
readings will overwrite the first (oldest) readings stored; the most
recent readings are always preserved.
• You can specify a trigger count in conjunction with a sweep count.
The two parameters operate independent of one another, and the total
number of readings returned will be the product of the two
parameters.
• The CONFigure and MEASure? commands automatically set the scan
trigger count to 1.
• The instrument sets the scan trigger count to 1 after a Factory Reset
(
*RST command). An Instrument Preset (SYSTem:PRESet command) or
Card Reset (
SYSTem:CPON command) does not change the setting.
The following command sets the trigger count:
TRIGger:COUNt
To configure a continuous scan, send TRIG:COUNT INFINITY.
Sweep Count
Usage:
• L4450A 64- Bit Digital I/O (digital input, counter channels only)
• L4452A Multifunction Module (digital input, totalizer channels only)
The sweep count sets the number of sweeps per trigger event during a
scan (a sweep is one pass through the scan list).
Figure 3-11. Sweep Count Diagram.
• The sweep count is valid only while scanning. If no channels have
been assigned to the scan list, the specified sweep count is ignored
(no error is generated).
t
Sweep 1Trigger
Sweep Count
(1 to 500,000 sweeps)
Sweep 2
Sweep n
Trigger
. . .
- Agilent L4400 Series 1
- LXI Class C Instruments 1
- Additional Safety Notices 4
- Declaration of Conformity 5
- Contents 7
- L4400 User’s Guide vii 9
- L4400 User’s Guide ix 11
- LXI Instruments 13
- Instrument Considerations 14
- L4400 User’s Guide 3 15
- 4 L4400 User’s Guide 16
- Bench-Top Operation 17
- Rack Mounting 17
- Procedure 18
- Install the Shelf Rails 19
- Install the Sliding Shelf 21
- Applying Power 23
- 12 L4400 User’s Guide 24
- Power Button 24
- 14 L4400 User’s Guide 26
- L4400 User’s Guide 15 27
- 16 L4400 User’s Guide 28
- Selecting a LAN Network 29
- Connecting the LAN Cables 30
- Private Network Connections 31
- IP Addresses and Host Names 32
- Configuring the LAN Interface 33
- Locating the Instruments 34
- Explorer pane 35
- Properties pane 35
- L4400 User’s Guide 23 35
- 24 L4400 User’s Guide 36
- L4400 User’s Guide 25 37
- Interactive IO 38
- Identifying the Instruments 39
- L4400 User’s Guide 29 41
- 30 L4400 User’s Guide 42
- L4400 User’s Guide 31 43
- 32 L4400 User’s Guide 44
- GPIB Configuration 45
- 34 L4400 User’s Guide 46
- The GPIB Address String 47
- 36 L4400 User’s Guide 48
- Highlight instrument and 49
- Adding Additional Instruments 50
- Firmware Updates 51
- ” in a green 52
- L4400 User’s Guide 41 53
- 42 L4400 User’s Guide 54
- L4400 User’s Guide 43 55
- 44 L4400 User’s Guide 56
- L4400 User’s Guide 45 57
- 46 L4400 User’s Guide 58
- Operating and Programming 59
- The LAN Reset Button 60
- The Front Panel LEDs 60
- Analog Bus Port 62
- Ext Trig/Alarms/DIO Port 63
- GPIB Connector 63
- LAN Port 63
- Syntax Conventions 65
- Command Separators 66
- Querying Parameter Settings 66
- L4400 SCPI Command Summary 67
- Operating and Programming 3 71
- L4400 User’s Guide 59 71
- Visual Basic.NET 72
- Modifying IVI-C Examples 73
- Visual Basic 6.0 75
- VISA COM Examples 75
- Analog Bus Applications 77
- Transients 78
- Safety Interlock 79
- User-Defined Channel Labels 80
- Scanning Applications 81
- Creating the Scan List 83
- Scan Trigger Source 84
- Manual Scanning 85
- Scanning on Alarm 86
- Trigger Count 87
- Sweep Count 88
- Channel Delay 89
- Reading Format 91
- Non-Sequential Scanning 91
- Monitor Mode 92
- L4400 User’s Guide 83 95
- Alarm Limits 96
- L4400 User’s Guide 85 97
- Viewing Stored Alarm Data 99
- Using the Alarm Output Lines 100
- Using Sequences 101
- Defining a Sequence 102
- 3 Operating and Programming 104
- Executing a Sequence 105
- Deleting Sequences 107
- Instrument State Storage 108
- Error Conditions 109
- Relay Cycle Count 110
- Calibration Overview 110
- L4421A 40-Channel Armature 111
- Multiplexer 111
- L4421A Measurement Functions 112
- L4421A SCPI Command Summary 113
- Opening and Closing Channels 115
- 104 L4400 User’s Guide 116
- L4400 User’s Guide 105 117
- L4421A Simplified Schematic 118
- L4421A D-Sub Connectors 119
- 34921T Terminal Block 120
- L4400 User’s Guide 109 121
- THIS PAGE INTENTIONALLY BLANK 122
- Agilent Technologies 123
- Matrix Switch Instrument 124
- L4433A SCPI Command Summary 125
- 116 L4400 User’s Guide 128
- L4400 User’s Guide 117 129
- Two-Wire Mode 130
- One-Wire Mode 131
- 120 L4400 User’s Guide 132
- Matrix 1 133
- Matrix 2 133
- 122 L4400 User’s Guide 134
- Matrix 3 136
- Matrix 4 136
- Matrices 1 and 2 137
- Matrices 3 and 4 137
- 126 L4400 User’s Guide 138
- L4437A General Purpose Switch 139
- 128 L4400 User’s Guide 140
- L4437A SCPI Command Summary 142
- L4437A Simplified Schematic 144
- L4437A D-Sub Connectors 145
- 34937T Terminal Block 146
- L4445A SCPI Command Summary 148
- (Sequence 149
- Operation) 149
- L4400 User’s Guide 137 149
- 138 L4400 User’s Guide 150
- Power Supplies 154
- Channel Numbering 155
- Simple Switch Control 156
- Remote Module Identifiers 157
- Drive Modes 157
- Continuous Drive Current 158
- Using Continuous Drive 158
- Pairing Channels 159
- Using Pulse Drive 160
- Long Execution Times 161
- Verifying Switch State 161
- LED Drive 163
- Default and Reset States 164
- ROUTe:RMODule:BANK:PRESet 165
- Distribution Boards 166
- Y1150A Connections 168
- Y1150A Switch Control 169
- Y1151A Connections 172
- Y1151A Switch Control 174
- Y1152A Connections 177
- Y1152A Switch Control 179
- 84904/5/6/7/8 181
- Y1153A Connections 182
- Y1153A Attenuator Control 184
- Y1154A Connections 187
- Y1154A Switch Control 189
- Y1155A Connections 193
- Y1155A Switch Control 194
- 184 L4400 User’s Guide 196
- Logic Gate 197
- 186 L4400 User’s Guide 198
- Mounting the Remote Modules 199
- SCPI Programming Examples 200
- L4450A SCPI Command Summary 204
- L4400 User’s Guide 199 211
- Basic Digital I/O Operations 212
- Writing Digital Data 213
- Handshaking 215
- Synchronous Handshake Mode 217
- H0 (Direction) 218
- H1 (Strobe) 218
- Data Ou t 218
- H0 (Start/ 219
- H2 (Strobe In) 219
- H0 (Start/Stop) 220
- H1 (Strobe Out) 220
- Data Out 220
- H2 (Cloc k In ) 221
- Buffered I/O Operations 222
- Deleting Traces 224
- Buffered (Memory) Input 224
- Interrupt Lines 225
- Memory Input Operations 226
- Byte Ordering 227
- Pattern Matching 228
- Ext Gate 229
- Initiated Measurement Mode 230
- L4450A D-Sub Connectors 231
- 34950T Terminal Block 234
- Level Output Mode 236
- Waveform (Trace) Mode 236
- L4400 User’s Guide 225 237
- L4451A SCPI Command Summary 238
- Subsystem 238
- Commands 238
- Level Mode 240
- Waveform Mode 241
- External Clock 242
- External Trigger 242
- Configuring a DAC Module 242
- L4400 User’s Guide 231 243
- 232 L4400 User’s Guide 244
- L4451A D-Sub Connector Pinout 245
- 34951T Terminal Block 246
- DIO, D/A, and Totalizer 247
- L4452A Multifunction Module 248
- L4452A SCPI Command Summary 249
- Digital Input/Output 253
- Totali zer 253
- DAC Output 254
- L4400 User’s Guide 243 255
- L4452A D-Sub Connector 256
- 34952T Terminal Block 257
- Appendix A 259
- Procedures 259
- Calibration Procedures 260
- Recommended Test Equipment 261
- Calibration Security 262
- Calibration Message 263
- Calibration Count 263
- Calibration Process 264
- L4400 User’s Guide 253 265
- L4451A Verification 266
- Current Output Verification 267
- Output Current 268
- Output Voltage 269
- Error From Nominal 269
- Voltage Adjustments 270
- Current Adjustments 271
- voltage 275
- Numerics 277
- 266 L4400 User’s Guide 278
- L4400 User’s Guide 267 279
- 268 L4400 User’s Guide 280
- L4400 User’s Guide 269 281
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