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13841 Rev A
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5.5.3.2 Clockwise Rotor Correction 156
5.5.4 Tail Rotor Balance – Using Protractor .......................... 156
5.5.4.1 Clockwise Rotors 157
5.5.4.2 Counter-Clockwise Rotors 158
5.5.5 Tail Rotor Track ............................................................ 159
5.6 Helicopter Balance (EV2K+ Heli Only) ............................. 161
5.6.1 Helicopter Balance Initial Startup ................................. 162
5.6.2 Helicopter Balancing ..................................................... 164
5.6.2.1 Alternate Solutions 173
5.6.3 Auto-Correction............................................................. 176
5.6.4 Job Selection ................................................................. 179
5.6.5 Removing and Editing Models and Charts .................... 180
5.6.6 Helicopter Balance Run Print, Review and Clearing .... 185
5.7 Fixed Wing Balance (EV2K+ Fixed Wing only) ............... 186
5.8 Spectrum Analysis (All Vibrex 2000 units)........................ 188
5.8.1 Spectrum Analysis Setup ............................................... 190
5.8.1.1 Ranging Feature 192
5.8.1.2 Annotating Spectra 193
5.8.2 Collecting Spectral Data ................................................ 193
5.8.3 Order Analysis ............................................................... 195
5.8.4 Spectrum Viewer Feature .............................................. 196
5.8.4.1 After Taking Measurements 197
5.8.4.2 Displaying Cursor Data 199
6.0 Maintenance ..................................................................201
6.1 Maintenance: Introduction ................................................. 201
6.2 Theory of Operation ............................................................ 202
6.2.1 Digital Subsystem .......................................................... 202
6.2.2 Display Subsystem ........................................................ 203
6.2.3 Analog Subsystem ......................................................... 204
6.2.3.1 Velocity Signal 204
6.2.3.2 Azimuth Signal 204