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4-8
Troubleshooting
Model 2520 Pulsed Laser Diode Test System Service Manual
Figure 4-2
Analog circuitry block diagram
High
DAC
U54
Voltage
Clamp
U4, U6
U16,Q9
Output
Stage
Q10-Q12
Current
Amplifiers
U8, U18
PULSED OUT
Terminals
Laser Diode Current Source
Control Data
From MPU
DAC
U1
Amplifier
and
Current
Drive
U20
DETECTOR 1
Bias Terminal
Detector 1 Voltage Bias Source
Control Data
From MPU
DAC
U2
Amplifier
and
Current
Drive
U3
DETECTOR 2
Bias Terminal
Detector 2 Voltage Bias Source
Control Data
From MPU
A/D
Converter
U31
Buffer
and
Ranging
U12,U13
PULSED SENSE
Terminals
Laser Diode Voltage Measurement
Sample Data
to SRAM
and DSP
A/D
Converter
U43
I-V
Converter
and
Ranging
U7,U8
Q10,Q11
DETECTOR 1
Current Input
Terminal
Detector 1 Current Measurement
Sample Data
to SRAM
and DSP
A/D
Converter
U53
I-V
Converter
and
Ranging
U10,U17
Q15,Q16
DETECTOR 2
Current Input
Terminal
Detector 2 Current Measurement
Sample Data
to SRAM
and DSP
Low
DAC
U1
Pulse
High/Low
Switch
U5
Содержание 2520
Страница 10: ......
Страница 13: ...1 PerformanceVerification...
Страница 30: ......
Страница 31: ...2 Calibration...
Страница 68: ...2 38 Calibration Model 2520 Pulsed Laser Diode Test System Service Manual...
Страница 69: ...3 RoutineMaintenance...
Страница 72: ...3 4 Routine Maintenance Model 2520 Pulsed Laser Diode Test System Service Manual...
Страница 73: ...4 Troubleshooting...
Страница 90: ...4 18 Troubleshooting Model 2520 Pulsed Laser Diode Test System Service Manual...
Страница 91: ...5 Disassembly...
Страница 98: ...5 8 Disassembly Model 2520 Pulsed Laser Diode Test System Service Manual...
Страница 99: ...6 ReplaceableParts...
Страница 116: ...6 18 Replaceable Parts Model 2520 Pulsed Laser Diode Test System Service Manual...
Страница 117: ...A Specifications...
Страница 121: ...B CalibrationReference...
Страница 132: ...B 12 Calibration Reference Model 2520 Pulsed Laser Diode Test System Service Manual...
Страница 136: ......