power spectrum measurement modes. It provides a x32 real zoom, and the capability to display data points
on the screen in powers of two. The display works by peak picking from the 6400 points. The LEFT and
RIGHT arrows control the frequency position of the cursor. When in the Zoom displays, the UP arrow key
causes a zoom-in by a factor of two, and the DOWN arrow key causes a zoom-out by a factor of two. The
zoom is always performed about the cursor position. The amplitude and frequency of the cursor position
are displayed in the upper right hand corner of the screen.
Figure 5. 6400 Point Zoom Display
h. Using Track/Lag Display
Track and lag data can be displayed as a single test or as part of a single flight display. There is currently no
track trend display that displays track between flights. This paragraph describes the operation of the
track/lag display as follows:
1. One Test State Track/Lag Displays. The One Test State track/lag display, figure 6, shows the average
track or lag collected at a particular Test State and time. The track/lag can be displayed relative to any
blade or relative to the mean. The LEFT and RIGHT arrow keys position the highlighted cursor block over
the reference blade. To display relative to the mean, simply place the cursor over MEAN. Function key F3
provides a tabular display of both track and lag.
Figure 6. One Test State Track/Lag Display
2. Complete Flight Track/Lag Display. The Complete Flight track/lag display, figure 7, provides relative
track/lag data for every measurement in a Flight Plan on a single screen The track/lag can be displayed
relative to any blade, relative to two planes, relative to a target pattern, or to the mean. The LEFT and
RIGHT arrow keys position the highlighted cursor block over the reference blade. To display relative to the
mean, simply place the cursor over MEAN. Function key F3 provides a tabular display of track or lag data.
It is important to note that either track or lag data can be displayed on a single display, but not both.
1 AUG 01
REL. TO MEAN
1 AUG 01
REL. TO MEAN
FLOWN 15:41:00 N 01 AUG 01
CURSOR 0.00ips 123.83 Hz
ZOOM = x4