manual

Page 40/62 SYSTEM ALIGNMENT GUIDELINES
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 NS-1
installed. It is not possible to configure a Geo tangent array properly without using NS-1. Note that,
when NS-1 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, Smaart, WinMLS 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.