
2-23
General Information
Theory of Operation
Active bias circuitry is used in the first amplifier stage to hold its DC bias
fixed, while the DC photocurrent from the PIN diode varies. A combination
threshold/hysteresis function on the DC board monitors the output of the
active bias current and uses the signal to light the
OVER ILLUMINATION
LED if
the average optical input power exceeds 3.5 mW. If the input power continues
to increase, the receiver goes into an unspecified state and measurement data
will be invalid. If average power exceeds 5 mW, permanent damage could
result.
Figure 2-12. Agilent 83411C/D block diagram
Summary of Contents for 83400 Series
Page 2: ...Agilent 83400 Series Lightwave Source and Receiver Modules User s Guide ...
Page 6: ...v Laser Classification IEC and FDA labels and their placement on an Agilent 83402C ...
Page 9: ......
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Page 17: ...1 6 Getting Started Connecting a Source Figure 1 2 Location of laser safety labels ...
Page 81: ...Index 4 Index width spectral procedure 4 4 Y YAG system dual hetrodyne 4 7 ...