Agilent Technologies N9340A Manuel d'utilisateur Page 58
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3 Making Measurements
48 N9340A User’s Guide
5 Press [Sweep] > {Sweep Time (Auto)} to put the
sweep time into stimulus response auto coupled
mode.
6 Increase measurement sensitivity and smooth the
noise:
Press [BW/SWP]> {RBW} >30 > {kHz}
Press [BW/SWP] > {VBW} > 30 > {kHz}
A decrease in displayed amplitude is caused by
tracking error.
7 Connect the cable from the tracking generator
output to the analyzer input. Store the frequency
response in trace 4 and normalize:
Press [MEAS] > {Normalize} > {Store Ref} (1 → 4) >
{Normalize (On)}
8 Reconnect the DUT to the analyzer and change
the normalized reference position:
Press [MEAS] > {Normalize} > {Norm Ref Posn} > 8 >
[ENTER]
9 Measure the rejection of the low- pass filter:
Press [Marker] > {Normal} > 370 > MHz, {Delta} > 130
> {MHz}
The marker readout displays the rejection of the
filter at 130 MHz above the cutoff frequency of
the low- pass filter.
Figure 18 Measure the Rejection Range
- 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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