Ceilometer CT25K
User’s Guide CT25K-U059en-2.1
56
Normal (full range) mode characteristics:
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)
Figure 5-4 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.
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