Anritsu S113C Guide de l'utilisateur Page 54
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To set the detection method, press the DETECTION soft key and select either POSITIVE
PEAK, AVERAGE,
or NEGATIVE PEAK detection.
Sweep Average
In order to reduce the effects of noise, it may be desirable to average the results of several
sweeps and display that average rather than the results of individual sweeps.
To set the number of sweeps to average, press the
AVERAGE (1-25) soft key and use the
up/down arrow key or directly enter the desired number of sweeps from the keypad. Press
ENTER to set the sweep average.
NOTE: MAX HOLD and AVERAGE are mutually exclusive.
Adjusting Attenuator Settings
The spectrum analyzer attenuation can be automatically coupled, manually coupled, or dy
-
namically adjusted.
Step 1.
Press the AMPLITUDE key.
Step 2. Press the
ATTEN soft key.
Step 3. Select the soft key corresponding to the desired coupling mode, as described be-
low.
Auto Coupling
Auto coupling of the attenuation links the attenuation to the reference level. That is, the
higher the reference level, the higher the attenuation. Auto coupling is indicated on the dis-
play as
ATTEN XX dB.
Manual Coupling
When manually coupled, the attenuation can be adjusted independently of the reference
level. Manual attenuation coupling is indicated on the display as
ATTEN* XX dB.
IMPORTANT!
The attenuation should be adjusted such that the maximum signal amplitude at
the input mixer is –30 dBm or less. For example, if the reference level is +20
dBm, the attenuation should be 50 dB such that the input signal at the mixer is
–30 dBm (+20 – 50 = –30). This prevents signal compression.
Dynamic Attenuation
Dynamic attenuation tracks the input signal level, automatically adjusting the reference
level to the peak input signal. When dynamic attenuation is enabled, the attenuation is auto
-
matically coupled to the reference level.
Dynamic attenuation is indicated on the display as
ATTEN# XX dB.
3-11
Chapter 3 Getting Started
- Site Master 1
- S113C, S114C 1
- S331C, and S332C 1
- Antenna, Cable and 1
- Spectrum Analyzer 1
- WARRANTY 3
- LIMITATION OF WARRANTY 3
- TRADEMARK ACKNOWLEDGMENTS 3
- Table of Contents 5
- Chapter 3 - Getting Started 6
- Chapter 6 - Power Measurement 8
- Chapter 7 - Software Tools 8
- Appendix A - Reference Data 8
- Appendix B - Windowing 8
- Chapter 1 9
- General Information 9
- Printers 10
- Optional Accessories 11
- Performance Specifications 12
- Chapter 1 General Information 13
- Preventive Maintenance 14
- Calibration 14
- Annual Verification 15
- ESD Precautions 15
- Chapter 2 17
- Functions and Operations 17
- Front Panel Overview 18
- Function Hard Keys 19
- Keypad Hard Keys 20
- Soft Keys 22
- MODE=DTF: 23
- SOFTKEYS: 23
- FREQ/DIST 23
- AMPLITUDE 23
- MODE=SPECTRUM ANALYZER: 24
- Power Monitor Menu 34
- Self Test 35
- Error Codes 35
- Description 36
- Self Test Error Messages 36
- Range Errors 37
- InstaCal Error Messages 38
- Battery Information 40
- BATTERY INDI 41
- Battery Life 42
- 2-27/2-28 43
- Chapter 3 44
- Getting Started 44
- Site Master Mode 45
- Calibration Verification 46
- Manual Calibration Procedure 47
- InstaCal Module Verification 48
- Site Master S332C 49
- Setting the Scale 50
- Auto Scale 50
- Amplitude Scale 50
- Spectrum Analyzer Mode 52
- Selecting Sweep Parameters 53
- Adjusting Attenuator Settings 54
- Save and Recall a Setup 55
- Save and Recall a Display 55
- Changing the Units 56
- Changing the Display Language 56
- Adjusting Markers 56
- Adjusting Limits 56
- Setting the System Language 58
- Setting the System Impedance 58
- Printing 59
- Printer Switch Settings 60
- Using the Soft Carrying Case 61
- Chapter 4 62
- Cable & Antenna 62
- Measurements 62
- MODE key 64
- Insertion Loss Measurement 65
- ´ Length (ft) = Loss (dB) 66
- Resolution 70
- MARKER key 71
- 4-11/4-12 72
- Chapter 5 73
- AUTO mode, as the 74
- MANUAL) mode, the 74
- AM/FM Modulation 75
- Frequency Modulation 76
- Field Strength Measurements 78
- Creating a Spectral Mask 79
- EDIT and enter the 80
- EDIT when done 80
- Trace Overlay 81
- Occupied Bandwidth 82
- Channel Power Measurement 84
- GSM Channel Power Measurement 84
- Procedure 85
- Adjacent Channel Power Ratio 87
- Measurement Applications 89
- Required Equipment 95
- In-band Spurious Measurement 97
- Field Strength 99
- Antenna Calculations 100
- 5-29/5-30 101
- Power Measurement 102
- Chapter 6 102
- Chapter 7 104
- Software Tools 104
- Installation 105
- Using Software Tools 106
- Plot Capture to the PC 107
- Plot Upload to the Instrument 107
- Plot Properties 107
- Trace Overlay or Plot Overlay 108
- Saving Traces 109
- Creating a Database 110
- Printing Formats 110
- Uploading Antenna Factors 111
- 7-9/7-10 112
- Appendix A 113
- Reference Data 113
- Appendix A Reference Data 114
- Appendix B 116
- Windowing 116
- Appendix B Windowing 117
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