Agilent Technologies 1912A Guia do Utilizador Página 78
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2 General Power Meter Functions
52 N1911A/1912A P-Series Power Meters User’s Guide
Setting the Video Averaging
Video averaging uses a digital filter to average repetitions of a triggered
signal. The number of acquisitions averaged can range from 1 to 256, in
multiples of 2
n
. With video averaging the average of a number of
acquisitions is calculated to smooth the displayed trace and reduce
apparent noise. The measurement requires a continuously repeating signal.
Increasing the value of this filter reduces noise but increases the time
required to make the measurement.
Procedure
Set the video average as follows:
1 Press . On dual channel meters select the required channel.
2 Use the and keys to select the Video Avg setting field.
3 Press to check the video averaging to on or off.
4 Use the key to select the Video Avg: value field.
5 Press to display the Video Avg Count pop- up.
NOTE
This feature is only available when a P-Series or an E-Series E9320 power sensor is
connected.
- Agilent 1
- N1911A/1912A 1
- P-Series Power 1
- Certification 3
- General Warranty 3
- Warranty Service 3
- Limitation of Warranty 4
- Exclusive Remedies 4
- Restricted Rights Legend 5
- Technology Licenses 5
- Safety Summary 6
- Safety Notices 6
- Safety Symbols 7
- General Safety Information 10
- Environmental Conditions 11
- Regulatory Information 11
- Regulatory Markings 12
- In This Guide 14
- Contents 15
- 10 Maintenance 17
- List of Figures 19
- List of Tables 25
- Rack Mounting 28
- Specifications 29
- 1 Introduction 32
- Key Function 32
- Introduction 1 33
- Connector Function 35
- The Display Layout 36
- 1820 1921 39
- Select TgDel 42
- Window Symbols and Pop-ups 44
- Wait Symbol Pop-up 45
- Confirm Symbol Pop-up 45
- Numeric Entry Pop-up 45
- Text Entry Pop-up 46
- Trace Scaling Pop-up 46
- List Pop-up 47
- Select the instrument/ 48
- Remote Interfaces 49
- General Power Meter Functions 55
- Setting the Resolution 59
- Making Relative Measurements 60
- Meas Config 62
- Channel A B 62
- Setting Display Offsets 67
- Measurement 68
- Selected Window/ 68
- Offset Setting Field 68
- Offset Value Field 68
- Freq. Dep. Offset 69
- Offset Table A Selected 71
- up window 74
- Setting Measurement Averaging 75
- Step Detection 77
- Setting the Video Averaging 78
- Setting the Video Bandwidth 80
- Auto Gate 85
- Auto Gate Settings 86
- Gate 1 Ref 1 0.0% 86
- Gate 1 Ref 2 0.0% 86
- Perpetual Off On 87
- Setting up the Channel Trace 88
- Watt or dBm 90
- Auto Scale 91
- Setting the Trigger 92
- Rising Edge 96
- Power Sweep Mode 99
- Power Meter 100
- Power Source 100
- Power Sensor 100
- (optional connection) 100
- Cont Trig 101
- Sing Trig 101
- Example of SCPI commands set 104
- Normal mode 104
- Average mode 105
- Frequency Sweep Mode 106
- Setting Measurement Limits 112
- Setting Limits 113
- Checking for Limit Failures 115
- 16 measurements per channel 116
- Numeric Format 117
- Single Function Measurement 118
- Combined Measurement 121
- Scaling the Analog Display 123
- Increment Multiplier 124
- Decrement Multiplier 124
- Recorder Output 125
- N1911A/N1912A Option H02 128
- Save/Recall 130
- Editing a Register’s Name 131
- Recalling a Measurement Setup 132
- When to Zero? 133
- Automatic Zero 133
- Calibration 134
- Manual Calibration 135
- Zero/Cal Lockout 136
- Presetting the Power Meter 137
- Setting the Cable Short/Long 139
- Using P-Series Power Sensor 141
- Introduction 142
- Setting the Trace Display 144
- Step 3. Setting the Trigger 146
- Gate 1 Active 148
- Marker 1 Active 148
- Active Marker 148
- Falling Edge 152
- Channel Setup 153
- Setting Offsets 154
- Trigger Setup 154
- Measurement Setup 155
- 3 Using P-Series Power Sensor 156
- Agilent Technologies 157
- Frequency 159
- Amplitude 159
- E9323A and E9327A sensors 159
- Power Meter Configuration 160
- Measurement Accuracy 162
- Disp Type 166
- Default Channel Setup 180
- CDMA Signal Measurements 184
- Multitone Signal Measurements 185
- Measuring TDMA Signals 186
- Procedure 187
- Setting the Range 189
- Measurement Considerations 190
- Accuracy 191
- Speed and Averaging 191
- to complete the entry 208
- Sensor Calibration Tables 210
- Insert Char 215
- Delete Char 215
- Option CFT 223
- display mode is chosen, the 233
- Sensor Table 2 Selected 236
- Function (CCDF) 243
- Setting the CCDF Table 245
- Expanded CCDF Table 246
- Full Screen CCDF Table 247
- Setting the CCDF Trace 248
- Step 2: Setting the Marker 249
- Step 3: Setting the Scale/Div 250
- Store to Reference 251
- Reference 251
- Trace Display 251
- Maintenance 253
- Self Test 254
- Instrument Self Test 255
- Remote Testing 256
- Test Descriptions 256
- Error Indicator 258
- Error Message List 260
- Operator Maintenance 269
- 10 Maintenance 270
- Check the Basics 271
- Instrument serial numbers 272
- MADE IN MALAYSIA 273
- Erasing Memory Data 274
- Conditions 281
- Measurement uncertainties 281
- Power Meter Specifications 282
- Power Sensors Compatibility 283
- Meter Uncertainty 283
- Remote Programming 284
- Timebase 284
- Bandwidth 284
- Measurement Characteristics 285
- Measurement Speed 286
- Pulse Characteristic 286
- Line Power 288
- 1 mW Power Reference 289
- Physical Characteristics 291
- Settings 293
- Characteristic Peak Flatness 294
- Noise and Drift 295
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