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Chapter 5 _______________________________________________________ Functional Description
Laser pulse 100 ns
Energy 1.6 µJ
Repetition rate 5.57 kHz
Number of pulses 65,536
Measurement time 11.7 s
Receiver on High Gain
Bandwidth 3 MHz
Sampling at 100 ns
500 useful samples per laser pulse
Measurement range 0 ... 25,000 ft. (0 ... 7.5 km)
9806-003
Figure 14
Block Diagram of Operational Units
In addition, there is another mode for carrying out a simulated
measurement without laser, with the Light Emitting Diode (LED) of
the Optics Monitor CTL21 acting as the simulated backscatter. This
mode serves for testing the whole receiver section.
When the measurement starts, the Timing and Control logic of the
DCT52 starts issuing trigger pulses to the Laser Transmitter CTT21 at
VAISALA________________________________________________________________________ 71