Exfo PM-1600 High-Speed Power Meter Manual de usuario Pagina 72
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Performing Typical Tests with Your PM-1600
62 PM-1600
Characterizing an Optical Switch
6. Change the switch position from one channel to the other. For each
channel, take note of the relative power measurement when the
channel is active.
7. For each channel, the total switch deviation will be the highest positive
deviation minus the highest negative deviation relative to the original
reference (taken at step 4). The repeatability of the switch insertion
loss may be expressed as ± (total deviation in dB)/2.
Testing the Settling Time
The triggering and fast stabilization of the PM-1600 can be used to capture
fast power transitions. A good example of this is the optical switch settling
time measurement. When an electrical control signal for the switch is
available, a settling time including the electronics response time can be
measured. This is done by controlling the PM-1600 remotely to easily
retrieve the acquisition data (see Controlling the PM-1600 Automatically or
Remotely on page 67).
To measure the settling time,
1. Connect the instruments as shown below.
2. Set the power meter channel to the same wavelength as the source.
HIGH-SPEED POWER METER
PM-1600
dB W/W
ENTER
dBm/W Ref
Null
Chan
Range
λ
Avg Sh ift
Store
Recall
Progra m
Setup
Analog Out
C1 C2
Ext. Trig
Display
PM-1600
OPTICAL LIGHT SOURCE
FLS-2100
On/Of f
ENTER
CW Up
λ
Modulation Down
Store
Setup
FLS-2100
Attenua tion
ACTIVE
DUT
(optical switch)
Control signals
Performing Typical Tests with Your PM-1600
62 PM-1600
Characterizing an Optical Switch
6. Change the switch position from one channel to the other. For each
channel, take note of the relative power measurement when the
channel is active.
7. For each channel, the total switch deviation will be the highest positive
deviation minus the highest negative deviation relative to the original
reference (taken at step 4). The repeatability of the switch insertion
loss may be expressed as ± (total deviation in dB)/2.
Testing the Settling Time
The triggering and fast stabilization of the PM-1600 can be used to capture
fast power transitions. A good example of this is the optical switch settling
time measurement. When an electrical control signal for the switch is
available, a settling time including the electronics response time can be
measured. This is done by controlling the PM-1600 remotely to easily
retrieve the acquisition data (see Controlling the PM-1600 Automatically or
Remotely on page 67).
To measure the settling time,
1. Connect the instruments as shown below.
2. Set the power meter channel to the same wavelength as the source.
HIGH-SPEED POWER METER
PM-1600
dB W/W
ENTER
dBm/W Ref
Null
Chan
Range
λ
Avg Sh ift
Store
Recall
Progra m
Setup
Analog Out
C1 C2
Ext. Trig
Display
PM-1600
OPTICAL LIGHT SOURCE
FLS-2100
On/Of f
ENTER
CW Up
λ
Modulation Down
Store
Setup
FLS-2100
Attenua tion
ACTIVE
DUT
(optical switch)
Control signals
- High-Speed Power Meter 1
- Contents 5
- High-Speed Power Meter v 7
- Certification Information 8
- DECLARATION OF CONFORMITY 9
- 1 Introducing the PM-1600 11
- Front Panel 12
- Back Panel 13
- RS-232 Connector Pinout 14
- 2 Safety Information 15
- General Safety Information 16
- Laser Safety Information 16
- Electrical Safety Information 17
- Power Cable 18
- 3 Getting Started with Your 19
- 10 PM-1600 20
- - - - - - - 21
- 12 PM-1600 22
- Nulling Electrical Offsets 22
- 4 Acquiring Power 23
- Measurements 23
- 1310.00 nm 24
- 1550.00 nm 24
- Measuring Absolute Power 25
- 1310.25 nm 26
- -32.218 dBm 26
- Measuring Relative Power 27
- 18 PM-1600 28
- Measuring Corrected Power 29
- Setting an Offset Value 30
- Setting Measurement Range 32
- Viewing Statistics 34
- mark is displayed 35
- 26 PM-1600 36
- Managing the Wavelength List 36
- 28 PM-1600 38
- Setting a Correction Factor 40
- Setting Display Resolution 42
- Setting Refresh Rate 44
- Setting Sampling Rate 45
- Averaging 46
- Saving a Setup Configuration 47
- 38 PM-1600 48
- Resetting the PM-1600 49
- 6 Programming Acquisitions 55
- 46 PM-1600 56
- High-Speed Power Meter 47 57
- 48 PM-1600 58
- High-Speed Power Meter 49 59
- High-Speed Power Meter 51 61
- High-Speed Power Meter 53 63
- 54 PM-1600 64
- Your PM-1600 65
- 56 PM-1600 66
- Testing Instrument Linearity 68
- 60 PM-1600 70
- Testing Repeatability 71
- Testing the Settling Time 72
- Using the External Trigger 73
- 64 PM-1600 74
- Using the Analog Output 75
- 8 Controlling the PM-1600 77
- Automatically or Remotely 77
- 68 PM-1600 78
- Communication Parameters 79
- High-Speed Power Meter 71 81
- Command Structure 82
- High-Speed Power Meter 73 83
- Error Messages 90
- High-Speed Power Meter 81 91
- PM-1600 Error Messages 92
- 9 Customizing the PM-1600 93
- Setting Display Contrast 94
- Choosing Video Mode 94
- 10 Maintenance 97
- Cleaning Fixed Connectors 98
- IMPORTANT 100
- Cleaning EUI/EUA Adapters 103
- Trigger Ports 105
- Replacing the Fuse 106
- 98 PM-1600 108
- Software Upgrade 108
- 11 Troubleshooting 111
- 102 PM-1600 112
- Transportation 114
- 12 Warranty 115
- 106 PM-1600 116
- Liability 116
- 108 PM-1600 118
- A Technical Specifications 119
- 110 PM-1600 120
- B Remote Control (SCPI) 121
- Commands 121
- 112 PM-1600 122
- General Commands 122
- 114 PM-1600 124
- 116 PM-1600 126
- FETCh[:SCALar]:POWer:DC? 128
- FORMat:READings[:DATA] 129
- INITiate:AUTOstop 130
- INITiate:AUTOstop? 130
- INITiate:CONTinuous 131
- INITiate:CONTinuous? 131
- 122 PM-1600 132
- Specific Commands 132
- READ:ALL:POWer:DC? 133
- READ[:SCALar]:POWer:DC? 133
- SENSe:AVERage:COUNt 134
- SENSe:AVERage:COUNt? 134
- SENSe:AVERage[:STATe] 135
- SENSe:AVERage:STATe? 135
- SENSe:CORRection:COLLect:ZERO 136
- SENSe:FREQuency[:CONTinuous] 138
- SENSe:FREQuency:CONTinuous? 139
- SENSe:FREQuency:NCONtinuous 140
- SENSe:FREQuency:NCONtinuous? 140
- SENSe:POWer:RANGe? 141
- SENSe:POWer:RANGe:AUTO 142
- SENSe:POWer:RANGe:AUTO? 143
- SENSe:POWer:RANGe:HIGH 144
- SENSe:POWer:RANGe:LIST? 144
- SENSe:POWer:RANGe:LOW 145
- SENSe:POWer:REFerence 145
- SENSe:POWer:REFerence? 146
- SENSe:POWer:REFerence:DISPlay 146
- SENSe:POWer:REFerence:STATe 147
- SENSe:POWer:REFerence:STATe? 147
- SENSe:POWer:UNIT 148
- SENSe:POWer:UNIT? 148
- SENSe:POWer:WAVElength 149
- SENSe:POWer:WAVElength? 149
- TRACe:DATA? 150
- TRACe:POINts 151
- TRACe:POINts? 151
- TRIGger:SEQuence:LEVel 152
- TRIGger:SEQuence:LEVel? 153
- TRIGger:SEQuence:SLOPe 153
- TRIGger:SEQuence:SLOPe? 154
- TRIGger:SEQuence:SOURce 154
- TRIGger:SEQuence:SOURce? 155
- TRIGger:SEQuence:STATe 155
- TRIGger:SEQuence:STATe? 156
- UNIT:POWer 156
- High-Speed Power Meter 147 157
- High-Speed Power Meter 149 159
- High-Speed Power Meter 151 161
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