Measurement-computing TempScan/1100 Manual do Utilizador Página 102
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5-12 System Operation
889897
TempScan / MultiScan User's Manual
Buffer Overrun With Multiple Trigger Blocks
When more than one Trigger Block is in the Acquisition Buffer, a buffer overrun will erase the oldest
complete Trigger Block. If the Trigger Block being erased is currently being read, that Trigger Block read
will be terminated and the Read Pointer will be advanced to the start of the next Trigger Block.
If the controller detects a buffer overrun condition during a read operation, any further reading will be
considered corrupt until a buffer reset is issued. This buffer reset can be done via the Flush Acquisition
Buffer (
*B) command or reading the remaining data out of the buffer until it is clear.
Buffer
Buffer
Read Pointer >
Scan -50 Pre-Trigger
Scans
Scan 751 Post-Stop
Scans
Scan -49
Write Pointer >
Scan 752
Scan -48 N/A
… N/A
Scan 000 Post-Trigger
Scans
No longer
accessible
Scan 000 Post-Trigger
Scans
… …
Scan 252
Read Pointer >
Scan 252
… …
Write Pointer >
Scan 450
Scan 450
… …
N/A Scan 500
… Post-Stop
Scans
… Post-Stop
Scans
End of Buffer > N/A End of Buffer > Scan 750
(1) The Write Pointer advances as scans are
collected while the Read Pointer advances
as scans are read from the buffer.
(2) After 302 scans, the Read Pointer has
advanced to Scan 252 while the Write Pointer has
advanced to Scan 752 (returning to the start of the
buffer and erasing the entire Pre-Trigger area).
Buffer Overrun – Single Trigger Block With Pre-Trigger Area
Buffer
Buffer
Scan 000 Post-Trigger
Scans
Scan 601 Post-Stop
Scans
Scan 001
Write Pointer >
Scan 602
Read Pointer >
Scan 002 No longer
accessible
Scan 002 Post-Trigger
Scans
… …
Scan 252
Read Pointer >
Scan 252
… …
Write Pointer >
Scan 352
Scan 352
… …
N/A Scan 450
… Post-Stop
Scans
… Post-Stop
Scans
End of Buffer > N/A End of Buffer > Scan 600
(1) The Write Pointer advances as scans are
collected while the Read Pointer advances
as scans are read from the buffer.
(2) After 250 scans, the Read Pointer has
advanced to Scan 252 while the Write Pointer has
advanced to Scan 602 (returning to the start of the
buffer and erasing one Post-Trigger scan at a
time).
Buffer Overrun – Single Trigger Block Without Pre-Trigger Area
- TempScan/1100 1
- MultiScan/1200 1
- Manual Layout 5
- Table of Contents 7
- 5 – System Operation 8
- 6 – System Calibration 8
- Quick Start Guide 11
- CAUTION 12
- Software Setup & Startup 13
- 988892 446-0940, rev 2.2 14
- System Overview 1 15
- Front Panel Indicators 16
- 899493 System Overview 1-3 17
- WARNING 20
- Hardware Configuration 21
- IEEE 488 Configuration 22
- 899493 System Overview 1-11 25
- Digital I/O Configuration 27
- Line Voltage Selection 32
- Fuse Replacement 34
- Rack Mount 35
- Bench Top 35
- Power-Up Activation 36
- Expansion Units 2 37
- 2-2 Expansion Units 38
- Expansion Unit 2-3 39
- Master/Slave Connection 40
- CAUTIONCAUTION 40
- Slave Configuration 41
- Channel Assignment 41
- Exp/11A Expansion Unit 43
- 2-8 Expansion Units 44
- Expansion Unit 2-9 45
- 2-12 Expansion Units 48
- Scanning Cards 3 49
- 3-2 Scanning Cards 50
- Scanning Cards 3-3 51
- 3-4 Scanning Cards 52
- 3-6 Scanning Cards 54
- MultiScan Scanning Cards 55
- 3-8 Scanning Cards 56
- Scanning Cards 3-9 57
- 3-10 Scanning Cards 58
- System Configuration 4 59
- Memory Allocation 60
- Required Configuration 64
- Scan Configuration 67
- 00:00:00.0 68
- I? command 68
- Acquisition Configuration 71
- Trigger Configuration 74
- Additional Configuration 76
- Alarm Configuration 77
- Stamp Configuration 80
- (2) PRINT#1, “OUTPUT07;R3X” 81
- (3) PRINT#1, “ENTER07" 81
- (4) INPUT A$ 81
- Data Format Configuration 84
- Power-Up Configuration 90
- System Operation 5 91
- Buffer Organization 92
- Trigger Block Configurations 93
- Buffer Query Operation 94
- Buffer Read Operations 95
- Buffer Overrun 101
- F) command 103
- Access to the HLL Registers 104
- 5-18 System Operation 108
- Theory of Operation 109
- Status-Reporting Registers 109
- 5-20 System Operation 110
- System Operation 5-21 111
- 5-22 System Operation 112
- Mask Registers 113
- Additional Operation 115
- Real-Time Clock 116
- System Calibration 6 117
- Calibration Setup 118
- Calibration Status 119
- Calibration Password 119
- K12345 120
- Software 131
- C3523DFA6C0A 133
- Overview 134
- 1) Waiting for Trigger 135
- Main Window 136
- 988992 ChartView , CV-5 137
- Channel Information Region 138
- Status Indicator Region 139
- Chart Pop-up Menu 140
- 988992 ChartView , CV-9 141
- CV-10 ChartView 142
- Software Reference 142
- Main Window Toolbar 143
- Display 144
- Configuration 144
- 988992 ChartView , CV-13 145
- CV-14 ChartView 146
- 988992 ChartView , CV-15 147
- 988992 Software Reference 148
- 988992 ChartView , CV-17 149
- Channel Configuration 150
- View File Data 150
- 988992 ChartView , CV-19 151
- Main Window Pull-Down Menus 152
- 988992 ChartView , CV-21 153
- View (continued) 155
- Acquire 156
- 988992 ChartView , CV-25 157
- Device … Interface ¾ 158
- 988992 ChartView , CV-27 159
- Device … Status ¾ 161
- 988992 ChartView , CV-31 163
- Bar Graph Meters 164
- Analog Meters 165
- Digital Meters 166
- Meter Toolbars 167
- Meter Pull-Down Menus 167
- Meters Configuration Menu 168
- Configuring a Meter 168
- Setup Window 169
- 988992 ChartView , CV-39 171
- CV-40 ChartView 172
- Acquisition Setup Dialog Box 173
- Acquisition Setup 174
- 988992 ChartView , CV-43 175
- CV-44 ChartView 176
- 988992 ChartView , CV-45 177
- Data Destination Dialog Box 178
- 988992 ChartView , CV-47 179
- Chart Setup Wizard 180
- 988992 ChartView , CV-49 181
- CV-50 ChartView 182
- ViewXL 183
- 989092 Software Reference 184
- Toolbar 185
- Load Configuration 186
- Options 186
- Data Acquisition Server 186
- Timestamps 187
- Multiple Data Files 188
- Import Files 188
- 457-0913 rev 3.0 189
- An Example Macro 191
- Sub GetData() 192
- ViewXL API Definition 193
- APPENDICES 195
- Introduction …… A-2 197
- Command Reference …… A-11 197
- Introduction 198
- Command Interpretation 199
- Immediate Immediate 200
- Immediate Immediate 200
- Command Summary 202
- Command Reference 207
- - Trigger On Command 208
- TempScan/1100 only 212
- - Reset Power-On 215
- - Configure Channels 221
- - Select Card 224
- - Set Relay Make Time 225
- MultiScan/1200 only 225
- - End Calibration Mode 226
- - Query Error Status 227
- - Set Data Format 228
- - Set Scan Interval 233
- - Set Trigger Level 237
- - Set Scan Rate 238
- - Set SRQ Mask 239
- - Set Measuring Mode 240
- - Set Event Mask 241
- - Set Digital Outputs 242
- - Program Trigger Times 243
- - Set Query Terminator 244
- - Query Card Data 245
- - Read Buffered Data 246
- - Read Last Readings 247
- - Set Real-Time Clock 248
- - User Status 251
- - Set User Terminator 254
- - Set Averaging Weight 255
- - Execute 256
- - Set Counts 257
- - Query 258
- IEEE 488 Bus Commands 260
- ASCII Codes 261
- ASCII Code Details 263
- Abbreviations 268
- Reading HLL Status 273
- (50) …… 15-WEND 278
- Operating Alarms 285
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