Model 1835-C - Newport Corporation

2.4.3 Meter Configuration ................................................................... 15
2.4.4 Auto Cal ....................................................................................... 16
2.4.5 User Calibration .......................................................................... 17
2.4.6 DC Sampling ................................................................................ 17
2.4.7 Trigger Output ............................................................................ 18
2.4.8 Trigger Input ............................................................................... 19
2.4.9 Bar Graph .................................................................................... 19
2.4.10 Tone ............................................................................................. 20
2.4.11 Detector Switch Position............................................................ 20
2.4.12 Remote Setup .............................................................................. 20
2.4.13 General Information Functions .................................................. 20
2.5 Connecting AC Power ............................................................................. 21
2.6 Detector Connection and Setup............................................................. 22
2.7 Power Up ................................................................................................. 22
2.8 Performing Basic Measurements ........................................................... 23
2.8.1 Making a DC Power Measurement ............................................ 23
2.8.2 Making a Peak-to-Peak Power Measurement ............................ 23
2.8.3 Making a Pulse Energy Measurement ....................................... 24
2.8.4 Making a Signal Integration Measurement................................ 24
2.8.5 Measuring a Laser Pulse Energy with a Thermopile Detector 24
2.8.6 Using the Model 1835-C as an Exposure Controller ................. 26
Section 3 – Principles of Operation
3.1 Introduction ............................................................................................ 27
3.2 Analog Signal Flow .................................................................................. 27
3.3 Digitized Signal Flow ............................................................................... 28
3.4 Typical Detector Signals......................................................................... 30
3.5 Thermopile Detector Signals ................................................................. 30
3.6 Pulse Energy Detector Signals ............................................................... 31
3.7 Peak-to-Peak (Photodiode) Detector Signals ........................................ 32
3.8 Integration of Detector Signals .............................................................. 33
3.9 Analog Output ......................................................................................... 34
3.10 Measurement Considerations ................................................................ 34
3.10.1 Detector Calibration and Accuracy ........................................... 34
3.10.2 Quantum Detector Temperature Effects .................................. 35
3.10.3 Thermopile Detector Temperature Effects .............................. 35
3.10.4 Energy Detector Temperature Effects ...................................... 35
3.10.5 Ambient and Stray Light ............................................................ 35
3.10.6 Common Measurement Errors .................................................. 36
Section 4 – Computer Interfacing
4.1 General Guidelines .................................................................................. 37
4.2 Computer Interface Terminology .......................................................... 37
4.3 Entering Remote Computer Interface Mode ......................................... 39
4.4 RS-232C Communication ........................................................................ 39
4.4.1 Setting Baud Rate and Echo Mode from the Keypad. .............. 40
4.4.2 Setting Baud Rate and Echo Mode from a Remote Interface .. 40
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