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Chapter 9 141
Programming Examples
Programming in C Using the VISA
Programming Examples
Typical Example Program Contents
The following is a summary of the VISA function calls used in the
example programs.
visa.h This file is included at the beginning of the file to
provide the function prototypes and constants defined
by VISA.
ViSession The ViSession is a VISA data type. Each object that
will establish a communication channel must be
defined as ViSession.
viOpenDefaultRM You must first open a session with the default
resource manager with the viOpenDefaultRM
function. This function will initialize the default
resource manager and return a pointer to that resource
manager session.
viOpen This function establishes a communication channel
with the device specified. A session identifier that can
be used with other VISA functions is returned. This call
must be made for each device you will be using.
viPrintf
viScanf These are the VISA formatted I/O functions that are
patterned after those used in the C programming
language. For example, the viPrintf call sends the
IEEE 488.2 *RST command to the instrument to put it
in a known state. The viPrintf call is used again to
query for the device identification (*IDN?). The
viScanf call is then used to read the results.
viClose This function must be used to close each session. When
you close a device session, all data structures that had
been allocated for the session will be de-allocated.
When you close the default manager session, all
sessions opened using the default manager session will
be closed.
- Examples 1
- Technology Licenses 2
- Restricted Rights Legend 2
- Contents 5
- Introduction 9
- Initial Inspection 10
- Safety Information 12
- Lifting and Handling 16
- Product Safety Data Sheet 17
- Declaration of Conformance 18
- Chapter 1 21 19
- Installation and Setup 19
- 22 Chapter 1 20
- Chapter 1 23 21
- 24 Chapter 1 22
- Chapter 1 25 23
- 26 Chapter 1 24
- Power Requirements 25
- 28 Chapter 1 26
- Table 1-2 AC Power Cords 27
- Clock Battery Information 28
- Using an External Reference 31
- Firmware Revision 32
- Printer Setup and Operation 33
- Using the Soft Carrying Case 35
- 38 Chapter 1 36
- Options and Accessories 37
- Options (see page 41) 38
- Accessories (see page 47) 38
- Dual battery charger 40
- Chapter 2 43 41
- Option Descriptions 42
- 46 Chapter 2 44
- Accessories 45
- 75 Ohm Matching Transformer 46
- AC Probe 46
- AC Probe (Low Frequency) 46
- RF and Transient Limiters 47
- Power Splitters 47
- System II Bottom Feet kit 47
- Static Safe Accessories 47
- 50 Chapter 2 48
- Front and Rear Panel Features 49
- Front Panel Overview 50
- On/Standby 52
- RF OUTPUT 52
- Chapter 3 55 53
- 56 Chapter 3 54
- Chapter 3 57 55
- 58 Chapter 3 56
- Chapter 3 59 57
- 60 Chapter 3 58
- Rear-Panel Features 59
- 62 Chapter 3 60
- Key Overview 61
- Recommended Test Equipment 63
- Test Equipment 64
- Chapter 4 67 65
- 68 Chapter 4 66
- 70 Chapter 5 68
- Making a Basic Measurement 69
- 72 Chapter 5 70
- Viewing a Signal 72
- Marker ⇒, Mkr ⇒ RL 73
- 76 Chapter 5 74
- Measuring Multiple Signals 75
- Marker Delta 78
- 84 Chapter 5 82
- Chapter 5 87 85
- Measuring a Low−Level Signal 86
- Reducing Input Attenuation 87
- 92 Chapter 5 90
- Trace Averaging 91
- Chapter 5 95 93
- Chapter 5 101 99
- Chapter 5 105 103
- Spectrum Analyzer 103
- 108 Chapter 5 106
- Channel Analyzer Measurements 107
- 110 Chapter 6 108
- Measurements 109
- graph is also 111
- 2 High 111
- Stimulus Response 113
- Measurements (Option N8995A) 113
- 116 Chapter 7 114
- (Option N8995A) 114
- Two Port Insertion Loss 115
- One Port Insertion Loss 118
- 122 Chapter 7 120
- Return Loss 121
- Distance to Fault 123
- 128 Chapter 7 126
- Concepts 127
- 130 Chapter 8 128
- Chapter 8 131 129
- Trigger Concepts 130
- Chapter 8 133 131
- Stimulus Response Overview 132
- Normalization Concepts 132
- Chapter 8 135 133
- 136 Chapter 8 134
- Programming Examples 135
- 138 Chapter 9 136
- Requirements 137
- 140 Chapter 9 138
- Chapter 9 141 139
- Linking to VISA Libraries 140
- Chapter 9 143 141
- Example Program 142
- Opening a Session 143
- Device Sessions 143
- Addressing a Session 145
- Closing a Session 146
- Basic System Operations 147
- 150 Chapter 10 148
- System Reference Introduction 149
- Setting System References 150
- Printing a Screen To a File 151
- Saving Data 152
- File Naming Options 153
- Managing Media Types 155
- Saving the State 158
- Saving the Power-Up State 158
- Recalling the State 158
- Deleting States 160
- Viewing System Statistics 161
- Using the Option Manager 162
- Testing System Functions 163
- 166 Chapter 10 164
- Working with Batteries 165
- 168 Chapter 11 166
- Installing Batteries 167
- Viewing Battery Status 168
- Charging Batteries 170
- Recalibrating Batteries 172
- Battery Care 173
- Chapter 11 177 175
- Battery Specifications 176
- 180 Chapter 11 178
- Connector Care 179
- 182 Chapter 12 180
- Connectors 181
- Proper Connector Torque 182
- Connector Wear and Damage 182
- Cleaning Procedure 183
- 186 Chapter 12 184
- In Case of Difficulty 185
- Esc or it is 187
- Esc key will 187
- Check the Basics 188
- Read the Warranty 189
- Service Options 189
- Calling Agilent Technologies 189
- 192 Chapter 13 190
- Service Tag 191
- Packaging 192
- 196 Chapter 13 194
- Copyright Information 195
- Chapter 14 199 197
- 200 Chapter 14 198
- Chapter 14 201 199
- 202 Chapter 14 200
- Chapter 14 203 201
- 204 Chapter 14 202
- Chapter 14 205 203
- 206 Chapter 14 204
- Chapter 14 207 205
- 208 Chapter 14 206
- Chapter 14 209 207
- 210 Chapter 14 208
- Chapter 14 211 209
- 212 Chapter 14 210
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