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6 N9320A Programmer’s Guide
1 Getting Started
About USB Interface
A USB connection is typically easy to setup and very cost
effective. The USB specification supports a wide selection of
devices that range from lower- speed devices, such as
keyboards and mice to higher- speed devices, such as digital
camera and intelligent instrument.
The USB interface initially offers up to 12 Mb/S. That is
about 100 times faster than the RS- 232 style serial
interfaces used in earlier generations. A USB 2.0 connection
is also faster than a LAN or GPIB connection.
USB Connector Types
Many USB devices come with their own built- in cable, with
an “A” connection on it. If not, then the device has a socket
on it that accepts a USB “B” connector. The USB standard
uses “A” and “B” connectors to avoid confusion.
Type A Type B
- Agilent N9320A 1
- Spectrum Analyzer 1
- In This Guide… 3
- N9320A Programmer’s Guide 4
- Contents 5
- Getting Started 7
- ® II or higher required 8
- ® 2000 Professional, service 8
- About USB Interface 12
- Programming Fundamentals 13
- Overview 14
- Command Categories 16
- Command Syntax 17
- Command Example 18
- Creating Valid Commands 19
- Program and Response Messages 20
- Parameters in Commands 21
- Variable Parameters 22
- Status Registers 23
- Access the status registers 25
- Status Register Examples 28
- Status Register System 29
- The Status Byte Register 30
- 0 1 2 3 4 5 6 7 32
- 3 4 5 6 7 32
- Programming Example 35
- Example Program 38
- #include “visa.h” 39
- Opening a Session 40
- Device Sessions 40
- Addressing a Session 42
- Closing a Session 42
- Checking USB Connection 43
- 38 N9320A Programmer’s Guide 44
- 4 Programming Example 44
- Programming Example 4 45
- N9320A Programmer’s Guide 39 45
- 40 N9320A Programmer’s Guide 46
- N9320A Programmer’s Guide 41 47
- 42 N9320A Programmer’s Guide 48
- N9320A Programmer’s Guide 43 49
- 44 N9320A Programmer’s Guide 50
- N9320A Programmer’s Guide 45 51
- Measuring Phase Noise 52
- N9320A Programmer’s Guide 47 53
- 48 N9320A Programmer’s Guide 54
- Command Reference 55
- IEEE Common Commands 56
- Identification Query 57
- Operation Complete Query 57
- Service Request Enable 58
- Status Byte Query 58
- CALCulate Subsystem 59
- NdBstate 60
- CALCulate:LLINe Subsection 61
- Delete Limit Line 62
- Display the Limit Line 63
- Set the Margin Size 63
- Display the Limit Margin 64
- Control Limit Line Testing 64
- Select the Type of Limit Line 64
- CALCulate:MARKer Subsection 65
- Frequency Counter Marker 66
- Marker Mode 68
- Define Peak Excursion 68
- Define Peak Search 68
- Define Peak Threshold 69
- Threshold Hidden 69
- Peak to Peak Delta Markers 70
- Turn on/off Phase Noise 70
- Set the Phase Noise Offset 70
- Optimize Phase Noise 71
- Read Phase Noise 71
- > Mkr –> Ref Lvl 72
- > Mkr –> Start 72
- > Mkr –> CF Step 72
- > Mkr –> Stop 72
- Marker On/Off 73
- Marker Table On/Off 73
- Marker to Trace 73
- Marker to Trace Auto 73
- Set the Delta Marker 75
- Set the Reference Marker 75
- Span Markers Span X Value 75
- CALCulate:NTData Subsection 76
- CALibration Subsystem 77
- CONFigure Subsystem 79
- Query the measurement State 80
- DISPlay Subsystem 81
- Display Line On/Off 83
- Normalized Reference Level 83
- FETCh Subsystem 86
- Channel Power measurement 87
- OBW measurement 87
- SEM measurement 87
- TOI measurement 88
- INITiate Subsystem 89
- Take New Data Acquisitions 90
- MMEMory Subsystem 91
- and:MMEM 93
- Store a Limit Line in a File 93
- Store a Trace in a File 94
- OUTPut Subsystem 95
- READ Subsystem 96
- Read the TOI (IP 3) 99
- SENSe Subsystem 100
- Set ACP Reference Auto 101
- Set ACP Reference Manual 102
- Set ACP to Total Pwr Ref 102
- Set the Measurement Method 103
- Set the Ref BW 103
- Set the Offset Freq 104
- Set the Measurement Type 105
- [:SENSe]:CHPower Subsection 106
- Set the Channel Power Span 107
- Amplitude 108
- Set the Average Mode 109
- Set OBW Span 109
- Turn on/off Max Hold 110
- Set the Occ BW% Pwr 110
- [:SENSe]:TOI Subsection 111
- Set the Max Mixer Lvl 112
- Set TOI Span 113
- [:SENSe]:SEMask Subsection 114
- Set the Channel Res BW 115
- Set Chan Span 115
- Set the Offset Res BW 115
- Set the Start Freq 116
- Set the Stop Freq 117
- Set the Sweep Time 117
- SEM:OFFS:LIST:SWE:AUTO 40 ms 117
- Set the Abs Start 118
- Set the Rel Start 118
- Set the Abs Stop 119
- Set the Rel Stop 119
- Set the Fail Mask 120
- [:SENSe]:AVERage Subsection 121
- Turn Averagi ng On/O ff 122
- [:SENSe]:BANDwidth Subsection 123
- Video Bandwidth 124
- Video Bandwidth Automatic 124
- [:SENSe]:DETector Subsection 125
- Typ e of Dete c tion 126
- Detector 126
- Frequency 127
- [:SENSe]:SWEep Subsection 130
- SOURce Subsystem 131
- Automatic Source Attenuation 132
- Sets the Output Power 132
- Output Power Tracking 133
- Output Power Tracking Peak 134
- SYSTem Subsystem 135
- Display Software Information 136
- System Configuration Query 136
- Display System Configuration 136
- Set Date 136
- Error Information Query 137
- Query Instrument Options 137
- Power on Type 137
- Persistent State Reset 138
- Preset Type 138
- Save User Preset 138
- Set Time 138
- TRACe Subsystem 139
- TRIGger Subsystem 140
- Trigg er Sour ce 141
- Video Trigger Level Amplitude 142
- 138 N9320A Programmer’s Guide 144
- 5 Command Reference 144
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