© Telex Communications, Inc. 02/2001
Part Number 38109-856 Rev A
U.S.A. and Canada only.
For customer orders, contact the Customer Service department at
800/392-3497 Fax: 800/955-6831
For warranty repair or service information, contact the Service
Repair department at 800/685-2606
For technical assistance, contact Technical Support at 866/78 AUDIO
Please refer to the Engineering Data Sheet for warranty information.
Specifications subject to change without notice.
Polar Response
The directional characteristics of the FC100, with driver attached,
were measured by running a set of horizontal/vertical polar
responses, in a large anechoic chamber, at each one-third-octave
center frequency. The test signal was one-third-octave,
pseudo-random pink noise centered at the indicated frequencies.
The measurement microphone was placed 6.1 m (20 ft.) from the
horn mouth, while rotation was about the waveguide geometric
apexes. These axes of rotation are quite close to the apparent
(acoustic) apexes across the frequency range of measurement.
Errors attributable to the slight differences between the geometric
and acoustic apexes are reduced to an inconsequential level by
the relatively long, 20-foot measuring distance. The horn was
suspended freely with no baffle. The polar plots shown in Figure 1
display the results of these tests. The center frequency is noted on
each plot. The wider plot on each chart is the horizontal polar (–)
and the narrower plot is the vertical polar (– – –).
Figure 1.
FC100 Polar Response
Figure 2.
FC100 Beamwidth vs. Frequency
Figure 3.
FC100 Directivity Factor and Directivity Index vs.Frequency
Beamwidth
A plot of the FC100’s 6-dB-down total included beamwidth angle is
shown in Figure 2 for each one-third-octave center frequency.
Directivity
The axial directivity factor R
θ
(formerly Q) of the FC100 horn was
computed at each one-third-octave center frequency from the
horizontal/vertical polars and is displayed in Figure 3.
Installation
As shipped, the “U” bracket is in position for vertical mounting. For
horizontal dispersion, or for mounts where bracket mounting holes
must be vertical, move bracket to the rear mounting position. The
horn can be mounted in a variety of horizontal and vertical
configurations by using adjustments of the swivel connections
(bracket to horn).
USA
12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-884-4051, FAX: 952-884-0043
Canada
705 Progress Avenue, Unit 46,Scarborough, Ontario, Canada, M1H2X1,Phone: 416-431-4975, 800-881-1685, FAX: 416-431-4588
Switzerland
Keltenstrasse 11, CH-2563 IPSACH, Switzerland, Phone: 41/32-331-6833. FAX: 41/32-331-1221
Germany
Hirschberger Ring 45, D94315, Straubing, Germany, Phone: 49 9421-706 392, FAX: 49 9421-706 287
France
Parc de Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: 33/1-6480-0090, FAX: 33/1-6480-4538
Australia
Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N.S.W. 2128, Australia, Phone: 61/2-9648-3455, FAX: 61/2-9648-5585
Hong Kong
Unit E & F, 21/F, Luk Hop Industrial Bldg., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: 852-2351-3628, FAX: 852-2351-3329
Japan
2-5-60 Izumi, Suginami-ku,Tokyo, Japan 168, Phone: 81-3-3325-7900, FAX:81-3-3325-7789
Singapore
3015A Ubi Rd 1, 05-10, Kampong Ubi Industrial Estate, Singapore 408705, Phone: 65-746-8760, FAX: 65-746-1206
Mexico
Av. Parque Chapultepec #66-201, Col. EI. Parque Edo. Mex. 53390, Phone: (52) 5358-5434, FAX: (52) 5358-5588
UK
4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: 44 181 640 9600, FAX: 44 181 646 7084
Africa, Mid-East
12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7424, FAX: 952-887-9212
Latin America
12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7491, FAX: 952-887-9212
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