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Making Measurements 3
N9340A User’s Guide 37
Making Distortion Measurements
This section provides information on measuring
and identifying signal distortion.
Identifying Analyzer Generated Distortion
High level input signals may cause analyzer
distortion products that could mask the real
distortion measured on the input signal. Use trace
and the RF attenuator to determine which signals,
if any, are internally generated distortion products.
In this example, use a signal from a signal
generator to determine whether the harmonic
distortion products are generated by the analyzer.
1 Input a signal (200 MHz, –10 dBm) to the
analyzer RF IN connector.
2 Set the analyzer center frequency and span:
• Press [PRESET]. (Factory Preset)
• Press [FREQ] > {Center Freq} > 400 > {MHz}.
• Press [SPAN] > 700 > {MHz}.
The signal produces harmonic distortion products
(spaced 200 MHz from the original 200 MHz signal)
Figure 13 Harmonic distortion
3 Change the center frequency to the value of the
first harmonic:
- User’s Guide 1
- 2
- Manual Part Number 3
- Warranty 3
- Technology Licenses 3
- Restricted Rights Legend 3
- CAU-CAUTION 4
- Table of Contents 5
- 4 System Setting 6
- 5 Key Reference 6
- 7Error Messages 10
- 8 Menu Map 10
- N9340A Overview 11
- Introduction 12
- Optimized Usability 13
- Front Panel Overview 14
- Top Panel Overview 15
- Display Annotations 16
- Step Notes 17
- Charging a Battery 18
- Getting Started 19
- Power Requirements 21
- AC Power Cords 22
- Safety Considerations 23
- Environmental Requirements 25
- Electrical Requirements 25
- Instrument Markings 26
- Power on your N9340A 27
- Preparation for Use 28
- Entering Data 30
- Viewing a Signal 31
- Some helpful tips 32
- Upgrading Firmware 33
- Adding an option 33
- Contact Agilent Technologies 34
- Making Measurements 35
- Measuring Multiple Signals 36
- Accuracy" on page 36 37
- Directional 38
- Signal generator 38
- Resolving Small Signals 40
- Hidden by Large Signals 40
- Measuring a Low-Level Signal 41
- Increased Sweep Time 44
- Trace Averaging 45
- One-button Power Measurement 53
- Measuring ACPR 54
- Measuring Channel Power 55
- Channel Bandwidth 56
- Low-pass Filter 59
- N9340A 61
- Making Measurements 3 63
- N9340A User’s Guide 53 63
- Calibration Routine 64
- System Setting 65
- Visual and Audio Adjustment 66
- Ext Input 68
- Quick saving a setup 69
- Quick recalling a setup 69
- File Type 70
- Saving Path 70
- Saving a file 71
- Viewing file list 72
- Deleting a file 73
- Loading a file 73
- Show System 74
- Show Error 75
- Factory Default Settings 77
- 4System Setting 78
- 68 N9340A User’s Guide 78
- Key Reference 79
- Amplitude 80
- Scale/DIV 81
- Scale Type 81
- Ref Offset 82
- Y Axis Units 82
- Avg Type 84
- In non-zero spans: 86
- In zero span: 86
- In FFT Mode 87
- Sweep Mode 87
- Single Sweep 88
- Frequency 91
- Peak Search 95
- • Freq Count 96
- Marker Trace 97
- Last Span 99
- Clear Write 100
- Max Hold 100
- Minimum Hold 101
- Detector 101
- Save Trace 104
- Recall Trace 104
- Limit Line 105
- Limit Pattern 105
- Set Pattern 105
- Limit Type 105
- Save Pattern 106
- Recall Pattern 106
- SCPI Command Reference 107
- SCPI Language Basics 108
- Basic Knowledge Requirement 109
- Command Categories 109
- Command Syntax 109
- Standard Notations 110
- Default unit of parameters 111
- Common Commands 112
- CALCulate Subsystem 113
- Control Limit line Buzzer 114
- Control Limit Line Testing 114
- Set Limit Line Y-axis value 114
- Control Limit Pattern Testing 115
- Define Limit Pattern Values 116
- CALCulate:MARKer Subsection 117
- Marker Function 118
- Marker Mode 119
- Marker On/Off 120
- Marker to Trace 120
- Marker readout: X Value 121
- Marker readout: Y Value 121
- DEMOdulation Subsystem 122
- DISPlay Subsystem 123
- Vertical Axis Scaling 125
- Display Mode 125
- Contrast 126
- Brightness 126
- INITiate Subsystem 127
- Select One button measurement 128
- MEASure Subsystem 129
- Adjacent channel 130
- Channel space 130
- Main Channel Power 130
- Low Adjacent Channel Power 130
- Upper Adjacent Channel Power 130
- Channel Power Subsection 132
- SENSe Subsystem 133
- Turn Averaging On/Off 134
- Set the Average Count 134
- [:SENSe]:BANDwidth Subsection 135
- Video Bandwidth Automatic 136
- [:SENSe]:DETector Subsection 137
- FREQuency Subsection 138
- Center Frequency Step Size 139
- Frequency Span 139
- Full Frequency Span 139
- Zero Frequency Span 140
- Last Frequency Span 140
- Start Frequency 140
- Stop Frequency 140
- [:SENSe]:POWer Subsection 141
- SWEep Subsection 142
- SYSTem Subsystem 143
- TRACe Subsystem 144
- Tracking Generator Subsystem 145
- Amplitude Step 146
- Amplitude Offset 146
- Storing as reference 147
- Normalization 147
- Normalization Reference Level 147
- TRIGer Subsystem 149
- Video Trigger Level Amplitude 150
- UNIT Subsystem 151
- 6 SCPI Command Reference 152
- 142 N9340A User’s Guide 152
- Error Messages 153
- Error Message List 154
- 7 Error Messages 158
- 148 N9340A User’s Guide 158
- Menu Map 159
- 8Menu Map 160
- 150 N9340A User’s Guide 160
- Menu Map 8 161
- N9340A User’s Guide 151 161
- 152 N9340A User’s Guide 162
- N9340A User’s Guide 153 163
- 154 N9340A User’s Guide 164
- N9340A User’s Guide 155 165
- 156 N9340A User’s Guide 166
- N9340A User’s Guide 157 167
- 158 N9340A User’s Guide 168
- *N9340-90001* 171
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