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Section 4 — Performing Measurements
4.1 Introduction ............................................................................................ 13
4.2 Photodetector Considerations ............................................................. 13
4.2.1 Detector Calibration and Accuracy............................................ 13
4.2.2 Quantum Detector Temperature Effects ................................... 14
4.2.3 Ambient and Stray Light .............................................................. 14
4.3 Setting the Wavelength .......................................................................... 15
4.4 Setting the Attenuator Mode ................................................................. 15
4.5 Performing Basic Measurements.......................................................... 16
4.5.1 Power Measurements .................................................................. 16
4.5.2 Logarithmic Measurements (dB and dBm) ............................... 16
4.5.2.1 Logarithmic Measurements Using Reference Powers (dB) . 17
4.5.2.2 Logarithmic Measurements Using 1 mW Reference (dBm) . 17
4.5.3 Relative Measurements ............................................................... 18
4.6 Common Measurement Errors ............................................................. 19
Section 5 — Computer Interfacing
5.1 Introduction ............................................................................................ 20
5.2 Computer Interface Terminology ......................................................... 20
5.3 Entering Remote Computer Interface Mode ....................................... 21
5.4 RS-232C Communication........................................................................ 22
5.4.1 Setting the Baud Rate .................................................................. 23
5.4.2 RS-232C Command Termination ................................................. 23
5.4.3 General Guidelines for Using the RS-232C Port ........................ 24
5.5 GPIB Communication ............................................................................. 24
5.5.1 Setting the GPIB Address ............................................................ 24
5.5.2 GPIB Command Termination ...................................................... 25
5.5.3 General Guidelines for Using the GPIB Port ............................. 26
5.5.4 Procedure for Reading Only New Measurements .................... 26
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