Agilent Technologies N9340A Podręcznik Użytkownika Strona 51
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Making Measurements 4
N9340B User’s Guide 45
Decreasing the Resolution Bandwidth
Resolution bandwidth settings affect the level of
internal noise without affecting the amplitude level
of continuous wave (CW) signals. Decreasing the
RBW by a decade reduces the noise floor by 10 dB.
1 Refer to “Reducing Input Attenuation" on
page 43, and follow steps 1, 2 and 3.
2 Decrease the resolution bandwidth:
• Press [BW/SWP], and toggle RBW setting to
Man (manual), then decrease the resolution
bandwidth using the knob, the arrow keys or
the numeric keypad.
The low level signal appears more clearly because
the noise level is reduced.
Figure 4-9 Decreasing resolution bandwidth
- User’s Guide 1
- 2
- Contents 3
- 4 Making Measurements 4
- 5 Key Reference 4
- 6Error Messages 5
- 7 Troubleshooting 5
- 8 Menu Map 5
- Documentation Conventions: 6
- Introduction 8
- Optimized Usability 10
- Front Panel Overview 11
- 15:44:03 03,10,08 12
- Top Panel Overview 13
- Instrument Markings 14
- Getting Started 15
- Power Requirements 17
- AC Power Cords 18
- Safety Considerations 19
- 2 Getting Started 20
- 14 N9340B User’s Guide 20
- Environmental Requirements 21
- Electrical Requirements 21
- Working with Batteries 22
- Charging a Battery 23
- Install battery 24
- Press Power Switch 24
- Preparation for Use 25
- Entering Data 26
- 22 N9340B User’s Guide 28
- System and File 29
- System Setting 30
- Factory Default Settings 31
- Visual and Audio Adjustment 32
- General system settings 32
- Switch Timer 33
- IP configuration 33
- Upgrading Firmware 34
- Ext Input 34
- Adding an Option 35
- Show System 36
- Show Error 36
- Low Frequency Channel 37
- Viewing file list 38
- Saving a file 39
- Saving Multiple Test Setups 40
- Quick saving a setup 40
- Deleting a file 41
- Loading a file 41
- 3 System and File 42
- 36 N9340B User’s Guide 42
- Making Measurements 43
- Measuring Multiple Signals 44
- Accuracy" on page 48 45
- Directional 46
- Signal generator 46
- Resolving Small Signals 48
- Hidden by Large Signals 48
- Measuring a Low-Level Signal 49
- Increased Sweep Time 52
- Trace Averagi ng 53
- CAU-CAUTION 61
- Low-pass Filter 63
- N9340A 65
- Making Measurements 4 67
- N9340B User’s Guide 61 67
- Calibration Routine 68
- Spectrogram Audio Alert 76
- Demodulating an FM Signal 77
- AM/FM Demodulation Analysis 79
- FM Demodulation Analysis 80
- ASK/FSK Demodulation Analysis 82
- FSK Demodulation Analysis 84
- Key Reference 87
- Amplitude 88
- Scale/DIV 89
- Scale Type 89
- HiSensitivity 90
- Ref Offset 90
- Y Axis Units 90
- EMF Mode 91
- Grid Scale 91
- Avg Type 93
- In FFT Mode 96
- Sweep Type 96
- Sweep Mode 96
- Single Sweep 97
- Frequency 99
- Freq Offset 100
- Peak Search 103
- Marker To 104
- Marker Trace 105
- Marker Table 105
- Selecting a Method 106
- Main Channel 107
- Adjacent Channel 107
- Channel Space 107
- Center Frequency 107
- Channel Power 108
- Spectrum Emission Mask (SEM) 109
- Offset/Limits 110
- Start Freq 112
- Stop Freq 112
- Sweep Time 112
- Abs StartAmpt 113
- Abs StopAmpt 113
- Rel StartAmpt 113
- Rel StopAmpt 113
- Fail Mask 114
- Spectrogram 115
- Disp Mode 116
- Save&Load 116
- Start/Stop Save 116
- Timed Setting 116
- File Setup 117
- Save RAM 117
- Save RAM As 117
- Load Spctrg 117
- Spectrum Analyzer 118
- Trackin g Generator 118
- Amptd Step 119
- Amptd Offset 119
- Normalize 119
- Power Meter 121
- Meas Disp 122
- Meas Setup 124
- is applied to the 125
- IBOC Measurement 126
- Quick Span 127
- Mask Fuction 128
- Auto Tune 130
- Tune Range 131
- Spectrogram Run/Pause 131
- Restart Meas 131
- Update Interval 131
- Spec View 131
- Last Span 134
- Speaker Vol 135
- Delay Time 135
- Free Run 136
- Ext Rise 137
- Ext Fall 137
- Trig Delay 137
- Clear Write 138
- Max Hold 138
- Minimum Hold 139
- Detector 139
- Save Trace 141
- Recall Trace 142
- Limit Line 143
- Edit Limits 143
- Limit Type 144
- Save Limits 144
- Load Limits 144
- Error Messages 145
- Overview 146
- Error Message List 147
- 6 Error Messages 150
- 144 N9340B User’s Guide 150
- Troubleshooting 151
- Check the basics 152
- Warranty and Service Options 153
- Contact Agilent Technologies 154
- Menu Map 155
- 8Menu Map 156
- 150 N9340B User’s Guide 156
- Menu Map 8 157
- N9340B User’s Guide 151 157
- 152 N9340B User’s Guide 158
- Peaks Search 159
- 154 N9340B User’s Guide 160
- MODE - IBOC Measurement 161
- MODE - Tracking Generator 162
- MODE - Power Meter 163
- 158 N9340B User’s Guide 164
- N9340B User’s Guide 159 165
- MODE - xDSL 166
- N9340B User’s Guide 161 167
- Language> 168
- N9340B User’s Guide 163 169
- 164 N9340B User’s Guide 170
- *N9340-90008* 174
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