Agilent Technologies N9340A Guia do Utilizador Página 54
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4 Making Measurements
52 N9340A User’s Guide
Using the Average Detector and
Increased Sweep Time
When the analyzer’s noise masks low- level signals,
changing to the average detector and increasing the
sweep time smooths the noise and improves the
signal’s visibility. Slower sweeps are required to
average more noise variations.
1 Refer to “Reducing Input Attenuation" on
page 49, and follow steps 1, 2 and 3.
2 Press [TRACE] > {More (1 of 2)} > {Detector} >
{Average} to select the average detector.
3 Press [BW/SWP] > {Sweep Time} to set the sweep
time to 500 ms.
Note how the noise smooths out, as there is
more time to average the values for each of the
displayed data points.
4 Press [BW/SWP] > {Avg Type} to change the
average type.
Figure 8 Using the Average Detector
- User’s Guide 1
- 2
- 1 N9340A Overview 3
- 2Getting Started 3
- 3 System Setting 3
- 4Making Measurements 4
- 5Key Reference 5
- 7 Error Messages 8
- 8Menu Map 8
- N9340A Overview 9
- Introduction 10
- Enhanced Usability 11
- Front Panel Overview 12
- Top Panel Overview 13
- Display Annotations 14
- Step Notes 15
- Internal Charging 16
- Getting Started 17
- Power Requirements 19
- AC Power Cords 20
- Safety Considerations 21
- CAU-CAUTION 22
- Environmental Requirements 23
- Electrical Requirements 23
- Instrument Markings 24
- Power on your N9340A 25
- Preparation for Use 26
- Entering Data 28
- Viewing a Signal 29
- Some helpful tips 30
- Upgrading Firmware 31
- Adding an option 31
- Contact Agilent Technologies 32
- System Setting 33
- Visual and Audio Adjustment 34
- Ext Input 36
- Quick Saving State 37
- Recalling State 37
- Saving a file 38
- Deleting a file 39
- Loading a file 39
- Show System 40
- Show Error 41
- Factory Default Settings 44
- Making Measurements 45
- Measuring Multiple Signals 46
- Accuracy" on page 54 47
- Directional 48
- Signal generator 48
- Resolving Small Signals 50
- Hidden by Large Signals 50
- Measuring a Low-Level Signal 51
- Increased Sweep Time 54
- Trace Averaging 55
- Measuring Phase Noise 63
- Phrasenoise a RBWlog–= 63
- One Button Measurement 65
- Measuring ACPR 66
- Measuring Channel Power 67
- Channel Bandwidth 68
- Key Reference 69
- Amplitude 70
- Scale/DIV 71
- Scale Type 71
- Ref Offset 72
- Y Axis Units 72
- Avg Type 74
- In non-zero spans: 76
- In zero span: 76
- In FFT Mode 77
- Sweep Mode 77
- Single Sweep 78
- Frequency 81
- •Next LF Peak 85
- •Next RT Peak 85
- •Auto Search 85
- •To Center 86
- •Freq Count 86
- Marker Trace 87
- Last Span 89
- Clear Write 90
- Max Hold 90
- Minimum Hold 91
- Detector 91
- •Average 92
- •Pos Peak 92
- •Neg Peak 93
- Save Trace 94
- Recall Trace 94
- Limit Line 95
- Limit Pattern 95
- Set Pattern 95
- Limit Type 95
- Save Pattern 96
- Recall Pattern 96
- SCPI Command Reference 97
- SCPI Language Basics 98
- Basic Knowledge Requirement 99
- Command Categories 99
- Command Syntax 99
- Standard Notations 100
- Separator 101
- Common Commands 102
- CALCulate Subsystem 103
- Control Limit line Buzzer 104
- Control Limit Line Testing 104
- Set Limit Line Y-axis value 104
- Control Limit Pattern Testing 105
- Define Limit Pattern Values 106
- CALCulate:MARKer Subsection 107
- Marker Function 108
- Marker Mode 109
- Marker On/Off 110
- Marker to Trace 111
- Marker X Value 111
- Marker Read Y Value 112
- DEMOdulation Subsystem 113
- DISPlay Subsystem 114
- Trace Y-Axis Reference Level 115
- Vertical Axis Scaling 116
- Screen Color Style 116
- Display Mode 116
- Contrast 117
- Brightness 117
- INITiate Subsystem 118
- Take New Data Acquisitions 119
- Select One button measurement 120
- MEASure Subsystem 121
- Main channel 122
- Adjacent channel 122
- Channel space 122
- Main Channel Power 123
- Low Adjacent Channel Power 123
- Upper Adjacent Channel Power 123
- Channel Power Subsection 124
- Channel Power 125
- Power Density 125
- SENSe Subsystem 126
- Tur n Aver agin g On /Off 127
- Set the Average Count 127
- [:SENSe]:BANDwidth Subsection 128
- Video Bandwidth Automatic 129
- [:SENSe]:DETector Subsection 130
- [:SENSe]:FREQuency Subsection 131
- Center Frequency Step Size 132
- Frequency Span 132
- Full Frequency Span 133
- Zero Frequency Span 133
- Last Frequency Span 133
- Start Frequency 133
- Stop Frequency 134
- [:SENSe]:POWer Subsection 135
- [:SENSe]:SWEep Subsection 136
- SYSTem Subsystem 137
- TRACe Subsystem 138
- TRIGer Subsystem 139
- Video Trigger Level Amplitude 140
- UNIT Subsystem 141
- 6 SCPI Command Reference 142
- 140 N9340A User’s Guide 142
- Error Messages 143
- Error Message List 144
- Menu Map 149
- 8 Menu Map 150
- 148 N9340A User’s Guide 150
- Menu Map 8 151
- N9340A User’s Guide 149 151
- 150 N9340A User’s Guide 152
- N9340A User’s Guide 151 153
- 152 N9340A User’s Guide 154
- N9340A User’s Guide 153 155
- 154 N9340A User’s Guide 156
- N9340A User’s Guide 155 157
- 156 N9340A User’s Guide 158
- Agilent Technologies 161
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