TM 1-6625-724-13&P
0010 00
0010 00-1
DISPLAYS
AVIATION VIBRATION ANALYZER
Figures
Figure 1. Display Menu Hierarchy .................................................................................................................................... 2
Figure 2. Summary Display Printout................................................................................................................................. 5
Figure 3. 400 Point Power Spectrum Display................................................................................................................... 7
Figure 4. 128 Point Synchronous Power Spectrum Display ............................................................................................ 7
Figure 5. 6400 Point Zoom Display .................................................................................................................................. 8
Figure 6. One Test State Track/Lag Display .................................................................................................................... 8
Figure 7. Complete Flight Track/Lag Display ................................................................................................................... 9
Figure 8. Complete Flight Polar Display........................................................................................................................... 9
Figure 9. Polar Trend Flights Display ............................................................................................................................. 10
Figure 10. Complete Flight Bar Display.......................................................................................................................... 10
Figure 11. Present Flight/Previous Flight Bar Display.................................................................................................... 11
The operator can view the results from the measurements taken at any time (in flight, right after completing the
measurements of a particular Test State or set of Test States, to a post-flight review in the office) using the DISPLAY
function. From these results, the operator can select a variety of graphic or tabular displays.
The displays are grouped by: One Test State, Complete Flight, Trend Flights, View Limits, and Summary Displays,
see figure 1. To initiate the DISPLAY mode, press the F2 key from the Main Menu.
NOTE
Displays are determined by the aircraft-specific setup
(script) files, not all displays shown here will appear for
all aircraft types.
a. Selecting One Test State Displays
One Test State displays present the results from each of the specific measurements made in a specific Test
State. Once the F2 key has been pressed, the operator can select the One Test State display mode by
placing the cursor over the One Test State mode selection in the menu, and pressing the DO key.
A sequence of screens will allow the operator to select the Test State of interest and then pick the
measurement to be viewed. The results will first be displayed graphically. The results can also be seen in
tabular form by pressing the F3 key labeled TABLE.
To display another measurement or Test State, press the QUIT key until the appropriate screen (Display or
Test State) reappears. Make the new selections and proceed as above. The graphic and tabular form of
displays will also appear for the Main Rotor measurements of Track and Lag.
b. Selecting Complete Flight Displays
Complete Flight displays present the results from a single measurement taken in each Test State of the flight.
Select Complete Flight from the display mode menu by placing the cursor over the Complete Flight selection
and pressing DO. The Displays screen will appear with the list of measurements whose results can be
compared relative to the other Test States. Select the measurement of interest, for example, the 1/REV
forward and aft vibration measurement. An entry form will allow the operator to select the number of Test
States to be displayed on a polar chart for the A-B 1/REV measurement. The same comparison can be done
for the rotor track measurements for each Test State in graphic or tabular form.
c. Selecting Trend Flights Displays
Trend Flights displays present the results from a single measurement that was taken on other flights on this
particular aircraft. To select the Trend Flights display mode, place cursor over the Trend Flights selection and
press DO. A screen of measurements will appear from which to choose for comparison with the same
measurement data from the other flights on this aircraft. The trend information from each measurement listed
can then be evaluated. When the trend data is shown for one measurement, press the QUIT key one or more
times to backup to the Displays screen. Then choose another measurement.
