HP Saw E4419B Manual do Utilizador Página 77
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HP4402.book : chapter2.fm 37 Fri Feb 12 15:32:45 1999
Power Meter Operation
Making Relative Measurements
HP E4419B User’s Guide 2-37
Making Relative Measurements
Relative mode allows you to compare any measurement result to a
reference value. The relative reading can be displayed in either dB or % by
pressing and selecting either or . When the measurement
result is displayed in % a prefix multiplier may be shown.
Relative mode is window dependent and when enabled displays “Rel” in
the window to which it’s applied.
Procedure
To set a reference value on the currently selected window:
1. Press .
2. Press to use the current reading as the reference value. This
allows you to compare any measurement result in dB or
percentage (%).
3. is automatically set to “On” when is pressed.
Successive measurements are now displayed relative to the reference
value. The relative mode can be disabled and re-enabled simply by
pressing .
dBm/W
dB %
Rel
Offset
Rel
Rel Off On Rel
Rel Off On
- User’s Guide 1
- Legal Information 3
- Limitation of Warranty 4
- Exclusive Remedies 4
- Equipment Operation 5
- General Safety Considerations 6
- IEC 1010-1 Compliance 7
- Statement of Compliance 7
- User Environment 7
- Installation Instructions 7
- Regulatory Information 8
- Declaration of Conformity 9
- List of Related Publications 10
- HP E4419B Options 11
- About this Guide 12
- Table of Contents 13
- .................... 2-27 14
- ........................ 2-29 14
- List of Figures 17
- List of Tables 19
- Getting Started 21
- Turning On the Power Meter 23
- The Front Panel at a Glance 24
- The Display Layout 27
- Selecting Your Display Layout 31
- Display Tutorial 32
- Window Symbols 34
- 1 of N Entry Window 35
- Numeric or Alphanumeric Entry 35
- The Rear Panel at a Glance 36
- Adjusting the Carrying Handle 38
- Rack Mounting the Power Meter 39
- General Information 43
- Running Time 43
- Charging Times 44
- Backlight 44
- Battery Removal/Replacement 45
- 2-6 HP E4419B User’s Guide 46
- Zeroing the Power Meter 47
- Zero/Cal Lockout 47
- Calibrating the Power Meter 48
- 2-12 HP E4419B User’s Guide 52
- 1 2 3 4 5 6 7 8 53
- HP E4419B User’s Guide 2-15 55
- Procedure 56
- Power Sensors 58
- Making the Measurement 62
- HP E4419B User’s Guide 2-27 67
- 2-28 HP E4419B User’s Guide 68
- HP E4419B User’s Guide 2-29 69
- Offset Tables 70
- Making Relative Measurements 77
- Setting the Resolution 78
- Setting Offsets 79
- Setting Averaging 81
- Step Detection 83
- Measuring Pulsed Signals 84
- Setting Measurement Limits 86
- Setting Window Limits 87
- Checking for Limit Failures 90
- Channel Measurements 92
- Making Ratio Measurements 94
- Setting the Range 98
- RS232/RS422 100
- Power Meter Operation 101
- Remote Interface Overview 102
- HP E4419B User’s Guide 2-63 103
- Recorder Outputs 105
- Leveling a Source Output 106
- 2-68 HP E4419B User’s Guide 108
- Presetting the Power Meter 110
- 2-72 HP E4419B User’s Guide 112
- • is set to “Off” 112
- TTL Inputs Off/On 112
- Self Test 113
- Remote Testing 116
- Test Descriptions 117
- Operator Maintenance 120
- Contacting Hewlett-Packard 121
- Check the Basics 122
- Instrument serial numbers 122
- GB12345678 123
- Sales and Service Offices 124
- 2-88 HP E4419B User’s Guide 128
- Menu Reference 129
- Introduction 130
- The Front Panel Menu Maps 131
- Frequency/Cal Fac Menu 132
- Meas Setup Menu 133
- Rel/Offset Menu 134
- Save/Recall Menu 134
- System Inputs Menu (1 of 4) 135
- System Inputs Menu (2 of 4) 136
- System Inputs Menu (3 of 4) 137
- System Inputs Menu (4 of 4) 138
- Zero/Cal Menu 139
- Front Panel Menu Reference 140
- Frequency 141
- More More 146
- Diagrammatical Hardkeys 164
- 3-38 HP E4419B User’s Guide 166
- Error Messages 167
- Specifications 179
- Power Meter Specifications 181
- Accuracy 182
- Power Reference 183
- Measurement Speed 184
- Zero Drift of Sensors 185
- Measurement Noise 185
- Settling Time 187
- Power Sensor Specifications 190
- General Characteristics 192
- Environmental Characteristics 193
- Dimensions 194
- Remote Programming 194
- Non-Volatile Memory 195
- 5-18 HP E4419B User’s Guide 196
- 3-19, 3-26 200
- , 1-8, 3-3 202
- "Zero/Cal" 203
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