Nexo LS18 - Manual (Page 71)

S YSTEM ALIGNMENT GUIDELINES Page 71/103
9.4 Recommended installation tools and equipment
 Tape measure – should be 30m/100ft in length and be of durable fibre material. Have
one per array available to speed up the installation process.
 Laser Inclinometer – For measuring vertical and horizontal angles in the venue. An ideal
product is the Calpac ‘Laser projecting a dot’ version which costs approximately 60 €.
 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 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.