Exfo FVA-3150 Variable Attenuator Manual do Utilizador descarregar pdf (Página 35)

Setting Up Your Variable Attenuator

Variable Attenuator 29

Selecting and Using an Attenuation Display Mode

Any value within the attenuation range may be selected as the reference.

When Reference mode is enabled (by selecting Ref):

 the current absolute attenuation setting becomes the reference value

and appears in the lower portion of the display; and

 0.000 dB (relative attenuation) is displayed in the upper portion of the

display.

If the attenuation is increased by 1.0 dB, the upper digits (relative

attenuation) will display -1.000 dB and the lower digits (absolute

attenuation) will indicate -17.450 dB.

Ref

Relative attenuation

Absolute attenuation

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 114 115

FVA-3150 1
Contents 3
Certification Information 5
DECLARATION OF CONFORMITY 6
1 Introducing the FVA-3150 7
Front Panel 8
Back Panel 9
Available Models 10
Typical Applications 10
IMPORTANT 11
2 Safety Information 13
Variable Attenuator 9 15
10 FVA-3150 16
Electrical Safety Information 16
Equipment Ratings 16
 Operation 16
 Storage 16
3 Getting Started With Your 17
Variable Attenuator 17
12 FVA-3150 18
Variable Attenuator 13 19
4 Setting Up Your Variable 21
Attenuator 21
Locking Control Key Access 22
Variable Attenuator 17 23
18 FVA-3150 24
Variable Attenuator 19 25
Selecting the Attenuation 26
22 FVA-3150 28
 Reference attenuation mode 30
Variable Attenuator 25 31
26 FVA-3150 32
Variable Attenuator 27 33
Current offset value for 33
28 FVA-3150 34
Variable Attenuator 29 35
Relative attenuation 35
Absolute attenuation 35
30 FVA-3150 36
Variable Attenuator 31 37
32 FVA-3150 38
Variable Attenuator 33 39
Configuration number 39
36 FVA-3150 42
Variable Attenuator 39 45
40 FVA-3150 46
Variable Attenuator 41 47
42 FVA-3150 48
Variable Attenuator 43 49
Operating the Shutter 50
6 Controlling Your Variable 51
Attenuator Remotely 51
46 FVA-3150 52
Variable Attenuator 47 53
GPIB Setting 53
GPIB address 53
Communication Parameters 54
Variable Attenuator 49 55
Command Structure 57
Error Messages 58
Description Probable Cause 59
RS-232 Connector Pinout 60
7 Maintenance 61
Recalibrating the Unit 65
Recycling and Disposal 66
8 Troubleshooting 67
Transportation 68
Liability 70
Service and Repairs 72
Variable Attenuator 67 73
Technical Specifications 76
B Remote Control Commands 77
72 FVA-3150 78
IEEE 488.2 Required Commands 78
76 FVA-3150 82
Command Function 83
78 FVA-3150 84
Command Tree 85
ATTenuation 87
Example ATT –15.350 DB 88
ATTenuation? 89
84 FVA-3150 90
Variable Attenuator 85 91
DISPlay:DIMMer 92
DISPlay:DIMMer? 92
Variable Attenuator 87 93
INPut:ATTenuation 94
Example INP:ATT -15.350 DB 95
INPut:ATTenuation? 96
INPut:OFFSet 97
INPut:OFFSet:DISPlay 97
INPut:OFFSet? 98
INPut:STEP 98
INPut:STEP? 99
INPut:STEP:CATAlog? 99
INPut:WAVElength 100
INPut:WAVElength? 100
OUTPut:APMode 101
OUTPut:APMode? 101
OUTPut[:STATe] 102
OUTPut[:STATe]? 102
PROGram:SELected:ATTenuation 103
PROGram:SELected:DELAy 103
PROGram:SELected:DURAtion 104
PROGram:SELected:STATe 104
PROGram:SELected:STATe? 105
PROGram:SELected:STEP 105
WaVeLength 106
WaVeLength? 106
SYSTem:ERRor? 107
SYSTem:VERSion? 107
Variable Attenuator 103 109
Variable Attenuator 105 111
₼⦌␂ℝ☀⹂䓸德棟Ⓟ䤓屓⸩ 113
MARKING REQUIREMENTS 114

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Exfo FVA-3150 Variable Attenuator Manual do Utilizador Página 35

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