Vaisala RVP900 - Page 10

List of Figures
Figure 1 RVP901 IFDR.......................................................................................................21
Figure 2 IF to I/Q Processing Steps..............................................................................22
Figure 3 Calibration Plot for RVP901........................................................................... 25
Figure 4 Digital IF Band Pass Design Tool.................................................................. 27
Figure 5 Burst Pulse Alignment Tool............................................................................28
Figure 6 Received Signal Spectrum Analysis Tool...................................................29
Figure 7 Analog vs Digital Receiver for Magnetron Systems.................................31
Figure 8 Basic Magnetron System................................................................................ 33
Figure 9 Dual Polarization Magnetron System..........................................................34
Figure 10 Analog versus Digital Receiver for Klystron Systems.............................35
Figure 11 Klystron System with Digital Tx....................................................................36
Figure 12 I/Q Processing for Weather Moment Extraction..................................... 41
Figure 13 Burst Pulse Analysis for Amplitude/Frequency/Phase......................... 42
Figure 14 Reset IP Address...............................................................................................49
Figure 15 Network Architecture......................................................................................52
Figure 16 RVP900 System Concept...............................................................................54
Figure 17 RVP901 IFDR......................................................................................................54
Figure 18 Calibration Plot for a Stand-Alone 16-Bit IFDR........................................ 68
Figure 19 Trade-o Between Dynamic Range and Sensitivity.............................. 69
Figure 20 DAFC Module..................................................................................................... 74
Figure 21 DAFC Assembly Diagram............................................................................... 75
Figure 22 Recommended Receiving Circuit for the Coax Uplink............................81
Figure 23 Timing Diagram of the IFD Coax Uplink......................................................81
Figure 24 Test Pattern Display........................................................................................132
Figure 25 Successful Capture of the Transmit Burst................................................ 133
Figure 26 Example of a Filter With Excellent DC Rejection................................... 138
Figure 27 Example of a Filter With a Poorly Matched Filter.................................. 139
Figure 28 Example of a Poorly Matched Filter...........................................................148
Figure 29 Example of a Filter With Poor DC Rejection........................................... 150
Figure 30 Example of Combined IF Sample and LOG Plot.....................................156
Figure 31 Example of a Noisy High Resolution Pr Spectrum.................................157
Figure 32 Ambiguity Diagram of a Compressed Tx Pulse....................................... 161
Figure 33 Frequency, Phase and Amplitude of a Compressed Tx Pulse.............162
Figure 34 IFDR Sampling of Optimized Compressed Tx Waveform....................166
Figure 35 Ideal and Actual Linear -FM Spectrum Displayed in Ps Plot............... 167
Figure 36 RVP 900Processing Flow Diagram............................................................ 172
Figure 37 Linearization of Saturated Signals Above +8 dBm................................ 182
Figure 38 Time Series and Doppler Power Spectrum Example............................ 185
Figure 39 Typical Form of Time Series Window........................................................186
Figure 40 Impulse Response of Typical Window.......................................................187
Figure 41 Fixed Width Clutter Filter Examples...........................................................191
Figure 42 Variable Width Clutter Filter........................................................................ 192
Figure 43 GMAP Algorithm Steps................................................................................. 194
Figure 44 GMAP Example................................................................................................199
Figure 45 1D Speckle Filtering Algorithm.....................................................................211
Figure 46 2D 3x3 Filtering Concept Examples...........................................................213
Figure 47 Model Intensity Curve - Power at Antenna Feed (2dB per
Major Division)................................................................................................. 215
Figure 48 Overview of Losses that Aect LOG Calibration.................................... 218
Figure 49 Dual PRF Concepts........................................................................................ 224
Figure 50 Example of Dual PRF Trigger Waveforms...............................................226
Figure 51 Random Phase Processing Algorithm......................................................228
RVP900 User Guide M211322EN-J
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