Download Model 2520Pulsed Laser Diode Test System User`s Manual

D
IEEE-488 Bus Overview
Introduction ............................................................................... D-2
Bus description .......................................................................... D-2
Bus lines .................................................................................... D-5
Data lines ........................................................................... D-5
Bus management lines ....................................................... D-5
Handshake lines ................................................................. D-5
Bus commands .......................................................................... D-7
Uniline commands ............................................................. D-8
Universal multiline commands .......................................... D-8
Addressed multiline commands ......................................... D-9
Address commands ............................................................ D-9
Unaddress commands ........................................................ D-9
Common commands ........................................................ D-10
SCPI commands ............................................................... D-10
Command codes ............................................................... D-10
Typical command sequences ............................................ D-12
IEEE command groups .................................................... D-13
Interface function codes .......................................................... D-14
E
IEEE-488 and SCPI Conformance Information
Introduction ................................................................................ E-2
F
Measurement Considerations
Optimizing laser diode connections ........................................... F-2
Current pulse output circuit model ..................................... F-2
Cable inductance ................................................................. F-3
Increasing cable length ....................................................... F-5
Exposed loop area ............................................................... F-6
Sense lead connections ....................................................... F-8
Magnetic coupling ............................................................ F-10
Increasing laser diode pulse measurement speed ..................... F-11
Overview ........................................................................... F-11
Laser diode impedance matching ...................................... F-12
Model 2520 output circuit model ...................................... F-13
Transmission line model ................................................... F-14
Forward voltage measurement .......................................... F-15
Photodiode current measurement channels ....................... F-16
Noise and source impedance .................................................... F-17
DUT resistance .................................................................. F-17
Source capacitance ............................................................ F-18
Generated currents ................................................................... F-18
Offset currents ................................................................... F-19
Dielectric absorption ......................................................... F-19
Voltage burden .......................................................................... F-20
General measurement considerations ....................................... F-20