DMTA-20073-01EN, Rev. C, November 2015
Chapter 5
64
For the approximate position of the probe’s active aperture, use the engravings on top
of the RollerFORM frame as a reference. These engravings indicate the position of the
first and last probe elements on the probe-axle (see Figure 5-1 on page 64).
Figure 5-1 Engravings on top of RollerFORM frame
The convention used to indicate the position of the first probe element in relation to
the last element is represented by the direction of the arrow engraved on the probe-
cable side of the probe-axle. The arrow points out from the acoustic wheel and
Engraving indicating the
beginning of active probe
aperture
Engraving indicating the end of active
probe aperture