Owner's Manual

Page 82/112 SYSTEM ALIGNMENT GUIDELINES
of the array, even while it is swinging, and has a green laser mounted coincident to and parallel
with the axis of the topmost cabinet.
• Spirit level – used to ascertain the trueness of the surface from which the angle measurements
originate.
• Rangefinder measuring device – either a Disto type laser measure or an optical laser rangefinder
can be used. Devices such as the Bushnell ‘Yardage Pro’ sports rangefinders provide sufficiently
accuracy and are easy to use. They have the additional advantage of working very well in bright
sunlight.
• Electronic calculator with trigonometric functions to calculate the height from ground level to
points in the room. The formula to calculate height of a point from measured angle and distance
is:
• Height of point = Sin(vertical angle in degrees) x distance to point
• NB: Take care when using spreadsheets as they calculate using radians by default. To convert
degrees to radians use the formula:
• Angle (in radians)=3.142 x Angle (in degrees)/180
• Computer – Laptop or Desktop PC running Windows XP with the current version of NEXO
GeoSoft2 installed. It is not possible to configure a Geo tangent array properly without using
GeoSoft2. Note that, when GeoSoft2 designs are prepared prior to arrival at the venue, it is often
necessary to modify or update the design to accommodate special circumstances. A PC is
absolutely essential to make such changes.
• Audio Analysis Software – recommended but not absolutely essential, programs such as Easera
Systune, Spectralab or Spectrafoo enable rapid and detailed analysis of the installation. Consider
taking a training course in using one of these tools if you are not already competent with them – it
will pay dividends in increased performance of the system.