Exfo IQS-3150 Variable Attenuator for IQS-500/600 Manual do Utilizador Página 72
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Measuring Multimode Insertion Loss
66 IQS-3150
There are several methods of eliminating these cladding modes:
³ A cladding mode stripper (preferred method) is a material with a
refractive index greater than that of the cladding. With the cladding
exposed, the fiber is immersed in the mode stripper (glycerin, oil, or
other suitable liquid). Due to the greater refractive index of the stripper,
light energy is not reflected at the cladding-stripper interface and
passes through the stripper.
³ Cladding modes attenuate to insignificant levels over relatively short
distances. Therefore, we recommend using a long fiber jumper.
³ A mandrel wrap can be introduced by making a minimum of five turns
around a 0.5 in. diameter mandrel. This method will introduce slight
losses in the multimode core and remove some of the cladding modes.
A mandrel wrap is not the preferred method of controlling cladding
modes in multimode fibers.
- IQS-3150 1
- Contents 3
- Certification Information 5
- DECLARATION OF CONFORMITY 6
- 1 Introducing the IQS-3150 7
- Local and Remote Control 8
- Typical Applications 9
- Main Software Features 10
- Control Mode Description 11
- Display Modes 12
- Multiple Module Control 13
- MPORTANT 14
- Laser Safety Information 15
- 2 Getting Started with Your 17
- Variable Attenuator 17
- 12 IQS-3150 18
- Variable Attenuator 13 19
- Retaining screw knob 19
- 14 IQS-3150 20
- Variable Attenuator 15 21
- 16 IQS-3150 22
- Data Display 23
- Title Bar 24
- Status Bar 24
- Exiting the Application 26
- 3 Setting Up Your Variable 27
- Attenuator 27
- 22 IQS-3150 28
- Basic Settings 28
- Setting the B Value 29
- 24 IQS-3150 30
- Variable Attenuator 25 31
- 26 IQS-3150 32
- Setting the Drift Tolerance 33
- 28 IQS-3150 34
- Variable Attenuator 29 35
- Variable Attenuator 31 37
- The selected 37
- 32 IQS-3150 38
- Variable Attenuator 33 39
- Defining an Offset Value 40
- 36 IQS-3150 42
- Creating a Test Sequence 42
- Setting a Starting Time 44
- Setting Repetition Scheme 46
- Managing Sequence Files 48
- 44 IQS-3150 50
- Nulling Electrical Offsets 54
- 50 IQS-3150 56
- Variable Attenuator 51 57
- (Self-Adjusting Modules) 58
- Shutter Status 60
- High-Power Detection 60
- Attenuators 61
- Selecting Modules to Control 62
- 58 IQS-3150 64
- 6 Monitoring Variable 65
- Attenuator Modules 65
- 60 IQS-3150 66
- Using Monitor Windows 66
- Using QuickTools 68
- 7 Measuring Multimode 71
- Insertion Loss 71
- 66 IQS-3150 72
- 8 Maintenance 73
- Calibration) 79
- Recalibrating the Unit 80
- Recycling and Disposal 81
- 9 Troubleshooting 83
- 78 IQS-3150 84
- IQS-3150-X XX 84
- Variable Attenuator 79 85
- Transportation 86
- 10 Warranty 87
- Exclusions 88
- Certification 88
- Service and Repairs 89
- 84 IQS-3150 90
- A Technical Specifications 91
- Technical Specifications 92
- Quick Reference Command Tree 94
- SCPI Command Reference 95
- :CALibration[1..n]:ZERO 96
- :CONTrol[1..n]:MODE 97
- :CONTrol[1..n]:MODE? 98
- :INPut[1..n]:ARESolution? 99
- :INPut[1..n]:ATTenuation 100
- :INPut[1..n]:ATTenuation? 102
- :INPut[1..n]:OFFSet 104
- :INPut[1..n]:OFFSet? 106
- :INPut[1..n]:RATTenuation 108
- :INPut[1..n]:RATTenuation? 111
- :INPut[1..n]:REFerence 113
- :INPut[1..n]:REFerence? 115
- :INPut[1..n]:WAVelength 117
- :INPut[1..n]:WAVelength? 119
- :OUTPut[1..n]:ALC[:STATe] 121
- :OUTPut[1..n]:ALC[:STATe]? 122
- :OUTPut[1..n]:APMode 123
- :OUTPut[1..n]:APMode? 125
- :OUTPut[1..n]:DTOlerance 126
- :OUTPut[1..n]:DTOlerance? 128
- :OUTPut[1..n]:LOCK[:STATe]? 130
- :OUTPut[1..n]:OFFSet 131
- :OUTPut[1..n]:OFFSet? 133
- :OUTPut[1..n]:POWer 135
- :OUTPut[1..n]:POWer? 137
- :OUTPut[1..n]:REFerence 139
- :OUTPut[1..n]:REFerence? 141
- :OUTPut[1..n]:RPOWer 143
- :OUTPut[1..n]:RPOWer? 145
- :OUTPut[1..n][:STATe] 147
- :OUTPut[1..n][:STATe]? 148
- Variable Attenuator 143 149
- 144 IQS-3150 150
- :SNUMber? 151
- :STATus? 152
- Variable Attenuator 147 153
- on the internal power meter 154
- CONDition? 155
- Variable Attenuator 151 157
- ..................... 48 158
- .................. 48 158
- Variable Attenuator 153 159
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