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44 Programmer’s Guide
4 Programming Example
Using Marker Delta Mode and Marker Minimum Search
/************************************************************/
/* Using Marker Delta Mode and Marker Minimum Search */
/* */
/* This example is for the N9342C Spectrum Analyzers */
/* */
/* This C programming example does the following. */
/* The SCPI instrument commands used are given as reference. */
/* */
/* - Opens a USB session */
/* - Clears the Analyzer */
/* - Resets the Analyzer */
/* *RST */
/* - Set the input port to the 50 MHz amplitude reference */
/* CAL:SOUR:STAT ON */
/* - Set the analyzer to single sweep mode */
/* INIT:CONT 0 */
/* - Prompts the user for the start and stop frequencies */
/* - Sets the start and stop frequencies */
/* SENS:FREQ:START freq */
/* SENS:FREQ:STOP freq */
/* - Trigger a sweep and delay for sweep completion */
/* INIT:IMM */
/* - Set the marker to the maximum peak */
/* CALC:MARK:MAX */
/* - Set the analyzer to activate the delta marker */
/* CALC:MARK:MODE DELT */
/* - Trigger a sweep and delay for sweep completion */
/* INIT:IMM */
/* - Set the marker to the minimum amplitude search mode */
/* CALC:MARK:PEAK:SEAR:MODE MIN */
/* - Set the marker to the minimum peak */
/* CALC:MARK:MAX */
/* - Query and read the marker amplitude */
/* CALC:MARK:Y? */
/* - Close the session */
- Agilent 1
- N9342C/43C/44C 1
- Handheld 1
- Spectrum Analyzer 1
- In This Guide… 3
- Programmer’s Guide 4
- Contents 5
- Getting Started 9
- ® II or higher required 10
- 8 Programmer’s Guide 16
- 1 Getting Started 16
- Programming Fundamentals 17
- Overview 18
- Command Categories 20
- Command Syntax 21
- Command Example 22
- Creating Valid Commands 23
- Program and Response Messages 24
- Parameters in Commands 25
- Variable Parameters 26
- Status Registers 27
- Access the status registers 29
- Status Register Examples 32
- Status Register System 33
- The Status Byte Register 34
- 0 1 2 3 4 5 6 7 36
- 3 4 5 6 7 36
- Programming Example 39
- Example Program 42
- Opening a Session 43
- Device Sessions 44
- Addressing a Session 46
- Closing a Session 46
- Checking the USB Connection 47
- 40 Programmer’s Guide 48
- 4 Programming Example 48
- Programming Example 4 49
- Programmer’s Guide 41 49
- 42 Programmer’s Guide 50
- Programmer’s Guide 43 51
- 44 Programmer’s Guide 52
- Programmer’s Guide 45 53
- 46 Programmer’s Guide 54
- Programmer’s Guide 47 55
- 48 Programmer’s Guide 56
- Command Reference 57
- IEEE Common Commands 58
- Identification Query 59
- Operation Complete Query 59
- Service Request Enable 60
- Status Byte Query 60
- Self Test Query 61
- Wait-to-Continue 61
- System Subsystem 62
- Set System Date 63
- System Time Zone Offset 63
- Run Lasted Time Query 63
- Language Type 63
- Enable Option 64
- Disable Option 64
- Installed Options Query 64
- System Error 64
- Calibrate Time Base by GPS 65
- BNC Port Input Type Setting 65
- Probe Power 66
- IP Config Host Name 66
- IP Address 66
- IP Address Assignment 66
- Gateway Setting 67
- Subnet Mask 67
- IP Config Apply 67
- Erase Memory 67
- System Preset 68
- Factory Default 68
- GPS State 68
- Sync to GPS Status 68
- GPS Information 69
- Timed Power On 69
- Timed Power On Repeat Mode 69
- Time Power On Time 69
- Time Power On Date 70
- Timed Power Off State 70
- Timed Power Off Repeat Mode 70
- Time Power Off Time 70
- Time Power Off Date 71
- Power On Type 71
- Preset Type 71
- Save User Preset 71
- DC Power In Type 72
- Low Frequency Channel Status 72
- Power Reset 72
- Power Off 72
- Speaker Volume 72
- Speaker Volume Flag 73
- Hardware Message 73
- Software Message 73
- System Message 73
- System Time Sync to GPS 73
- Memory Subsystem 74
- Move Data to File 75
- Delete a File 75
- Load a File 75
- Store a File 75
- Store Peak Table to CSV File 76
- Create A New Directory 76
- Delete A Directory 76
- Rename A Directory or File 76
- Load Correction File 77
- Instrument Subsystem 78
- Sense Subsystem 80
- Stop Frequency 81
- Center Frequency Step 81
- Center Frequency Channel Step 81
- Frequency Unit 81
- Frequency Offset 82
- Frequency Span 82
- Span Channel 82
- Full Frequency Span 83
- Zero Span 83
- Last Frequency Span 83
- Auto Tune 83
- Base Band Channel Switch 83
- Amplitude Subsection 84
- Input Port Preamplifer 85
- Preamp On/Off 85
- Scale/DIV 85
- Scale Type 85
- Hi-Sensitive 86
- More > Hi-sensitivity 86
- Reference Offset Level 86
- Correction Off 86
- Correction Apply State 87
- Set Correction X state Off 87
- Correction Antenna Unit State 87
- Read Correction X Data 87
- Current Correction Select 88
- Input Impedance selection 88
- PSD Mode State 88
- Bandwidth Subsection 89
- Auto Video Bandwidth State 90
- Trace Subsection 91
- Subtract Trace 92
- Query Trace Data 92
- Trace Math B y 92
- Trace Math O ff 92
- Trace Format 92
- Detector Subsection 93
- Average Subsection 94
- Sweep Subsection 95
- Gated Sweep State 96
- Gate View 96
- Gate View Sweep Time 96
- Gate Delay 97
- Gate Length 97
- Gate Source 97
- Display Subsection 98
- Calculate Subsystem 99
- Limit Line Y-axis Value 100
- Limit Line X-axis Value 100
- Limit State 100
- Query Current Limits Result 100
- Limit Beep State 101
- Define Limits Values 101
- Delete Limits Values 101
- Delete All Limits Data 101
- Query Limits Result 101
- Set the limits Margin Value 102
- Set Limits Margin State 102
- Marker Subsection 103
- Marker Function 104
- Peak Search 104
- :CALCu 104
- Next Peak Search 104
- Marker Peak Left/Right Search 105
- Marker Mode 105
- Peak Excursion 105
- Peak Search Type 106
- Peak Threshold 106
- Peak to Peak Delta Markers 106
- Marker to Center 107
- Marker to Start Frequency 107
- Marker to Stop Frequency 107
- Marker On/Off 108
- Marker to Trace 108
- Marker X value 108
- Marker Readout X Value 108
- Query Marker Readout: Y Value 109
- Marker Demod Type 109
- Marker Demod Speaker Volume 109
- Marker Demod Delay Time 109
- Initiate Subsystem 110
- Initiate a Single Sweep 111
- Trigger Subsystem 112
- Video Trigger Level Amplitude 113
- External Trigger Slope 113
- RF Burst Level 113
- RF Burst Trigger Slope 114
- Periodic Timer Period 114
- Periodic Timer Offset 114
- Synchronization Source 115
- Power Measurement Subsystem 116
- Adjacent Channel State 117
- Adjacent Channel Bandwidth 117
- Channel Space 118
- CHP Subsection 119
- Integration BW 120
- Channel Span 120
- Channel Span Power 120
- Channel Power Display Mode 120
- Channel Power Auto Range 121
- Channel Power Range Top 121
- Channel Power Range Bottom 121
- OBW Subsection 123
- Set dBc method of OBW 124
- OBW Span 124
- OBW Max Hold State 124
- Query OBW and Centroid Result 124
- SEM Subsection 125
- SEM Resolution Bandwidth 126
- SEM Total Power Reference 126
- SEM Channel Span 127
- SEM Center Frequency 127
- SEM Marker State 127
- SEM Marker X 127
- Query SEM Marker Y Value 128
- SEM Marker All Off 128
- SEM Offset Resolution BW 128
- SEM Offset Start Freq 129
- SEM Offset Stop Freq 129
- SEM Offset Sweep Time 130
- SEM Offset Abs StartAmpt 130
- SEM Offset Rel StartAmpt 131
- SEM Offset Abs Stop Ampt 131
- SEM Offset Rel StopAmpt 131
- SEM Offset Fail Mask 132
- SEM Meas Type 132
- SEM Lower Offset Fail Flag 132
- SEM Lower Offset Power 132
- Query SEM Upper Offset Power 133
- SEM Fail Setting Log 133
- SEM Fail Setting Hold 134
- SEM Fail Setting Beep 134
- Spectrogram State 135
- Spec Update Interval 135
- Spectrogram Palette 136
- Spectrogram Display Mode 136
- Spectrogram Marker State 136
- Spectrogram Display Frequency 136
- Spectrogram Marker Time 137
- Spectrogram Time Save State 139
- Spectrogram Start Save 139
- Spectrogram Stop Save 139
- Spectrogram Save Start Date 140
- Spectrogram Save Start Time 140
- Spectrogram Save Stop Date 140
- Spectrogram Save Stop Time 140
- Spectrogram Save File Type 141
- Spectrogram Save File Size 141
- Spectrogram Marker Y Value 141
- CAT Measurement Type 142
- CAT Calibration Type 142
- CAT IIM State 143
- CAT Display Type 143
- CAT Set Cable Type 143
- CAT Select A Cable 144
- CAT Cable Attenuation 144
- CAT Cable Velocity Factor 144
- CAT Windows Select 145
- CAT Start Frequency 145
- CAT Stop Frequency 145
- CAT Center Frequency 146
- CAT Frequency Span 146
- CAT Distance Start 146
- CAT Distance Stop 146
- CAT Distance Unit 147
- CAT Amplitude Auto Scale 147
- CAT Save Trace Data to Memory 148
- CAT Trace Display Type 148
- CAT Trace Math Type 149
- CAT Trace Average Number 149
- CAT Trace Data Format 149
- CAT Trace Data Query 150
- CAT Sweep Continuos State 150
- CAT Single Sweep 150
- CAT Marker All Off 150
- CAT Marker Mode 150
- CAT Set Marker X axis Value 151
- CAT Query Marker Y axis Value 151
- CAT Marker Peak Search 152
- CAT Valley Search 152
- CAT Limit Beep State 152
- CAT Limit Type 153
- CAT Limit Line State 153
- CAT Limit Line Value 153
- CAT Limit State 153
- CAT Get Limits Result 154
- CAT Define Limit Value 154
- CAT Delete Limit Data 154
- Sweep Mode 156
- Top N Nu mb er 156
- Bottom N Number 157
- Max Hold State 157
- Max Hold Dwell Time 157
- Mini Hold State 157
- Min Hold Dwell Time 158
- Average State 158
- Average Count Number 158
- Average Mode 158
- Measurement Interval State 159
- Measurement Interval Type 159
- Measurement Interval Time 159
- Measurement Interval Distance 159
- Top N/Bottom N Search Rule 160
- Top C yc le 160
- Bottom Cycle 161
- Scan Start/Stop State Switch 161
- Delete Channel For List Sweep 163
- Standard 167
- Display Switch 169
- Display Mode 169
- Display Threshold State 170
- Display Threshold Value 170
- Limit Value 170
- Limit Type 171
- Display Sort Type 171
- Display Sort Order 171
- Logging State 171
- Logging File Type 172
- Query Result 172
- Demodulation Option Subsystem 173
- Carrier Frequency Step 174
- Auto Carrier Frequency State 174
- Attenuation 174
- Single Sweep 175
- Sweep State 175
- External Gain 175
- AM Demodulation Subsection 176
- AM Average Count 177
- AM Detector 177
- AM Detector PeakHold 178
- AM IF Bandwidth 178
- AM Equal Low Pass Filter 179
- AM Limit State 179
- AM Carrier Power Upper Limit 179
- AM Depth Upper Limit 180
- AM Depth Lower Limit 180
- AM X Scale/DIV 181
- AM X Reference Value 181
- AM X Reference Position 181
- AM X Scale Coupling State 182
- AM Y Reference Value 182
- AM Y Scale/DIV 182
- FM Demodulation Subsection 183
- Query FM Modulation Rate 184
- Query FM Frequency Deviation 184
- FM Average Count 184
- FM Average Count State 184
- FM Detector 185
- FM Detector PeakHold 185
- FM IF Bandwidth 185
- FM Equal Low Pass Filter 186
- FM Limit State 186
- FM Carrier Power Upper Limit 186
- FM demodulation analysis 187
- FM X Scale/DIV 188
- FM X Reference Value 188
- FM X Reference Position 188
- FM X Scale Coupling State 189
- FM Y Reference Value 189
- FM Y Scale/DIV 189
- ASK Demodulation Subsection 190
- ASK Average Count 191
- ASK Symbol Rate 191
- ASK Measurement Filter 191
- ASK Reference Filter 192
- ASK Filter Symbols 192
- ASK Alpha/BbT 192
- ASK Measurement Length 193
- ASK Trigger Type 193
- ASK RF Trigger Level 193
- ASK External Trigger Type 194
- ASK Trigger Delay Time 194
- ASK Limit State 194
- ASK Carrier Power Upper Limit 195
- ASK Depth Upper Limit 195
- ASK Depth Lower Limit 195
- ASK View Type 196
- ASK X Scale/DIV 196
- ASK X Reference Value 197
- ASK X Reference Position 197
- ASK X Scale Coupling State 197
- ASK Y Reference Value 198
- ASK Y Scale/DIV 198
- ASK Y Reference Position 198
- FSK Demodulation Subsection 199
- FSK Symbol Rate 200
- FSK Measurement Filter 200
- FSK Reference Filter 200
- FSK Filter Symbols 201
- FSK Alpha/BbT 201
- FSK Measurement Length 201
- FSK Trigger Type 202
- FSK RF Trigger Level 202
- FSK External Trigger Type 202
- FSK Trigger Delay Time 203
- FSK Limit State 203
- FSK Carrier Power Upper Limit 203
- Range: -2 MHz to 2 MHz 204
- FSK View Type 205
- FSK X Scale/DIV 205
- FSK X Reference Value 205
- FSK X Reference Position 206
- FSK X Scale Coupling State 206
- FSK Y Reference Value 206
- FSK Y Scale/DIV 207
- FSK Y Reference Position 207
- FSK Y Scale Coupling State 207
- Read FSK Trace Data 208
- Power Meter Option Subsystem 209
- Switch Power Range 210
- Set Power Auto Range State 210
- Set Power Meter Offset State 211
- Set Power Meter Offset Value 211
- Set Power Meter Average State 211
- Set Trace X Start Time 213
- Set Trace X Scale Time 214
- Set Trace Y Max Value 214
- Set Trace Y Scale Value 214
- Set Gate Start Time 214
- Set Gate Length Time 215
- Set Display Resolution 215
- Set Display Auto Range State 215
- Set Chart View to Home 216
- Set Chart View to End 216
- Set Chart View to Previous 217
- Set Chart View to Next 217
- Set Limit State 217
- Set Limit Upper Value 217
- Set Limit Lower Value 218
- Set Limit Beep 218
- Query Limit Fail Result 218
- Query Limit Failure Count 218
- Set Gate Measurement Type 219
- Set Trigger Type 219
- Set Trigger Source 219
- Set Trigger Level 220
- Normalization Reference Level 223
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