AKG Acoustics WMS 4000 manual Modular Solutions for Professional Requirements

AKG WMS MULTICHANNEL TECHNOLOGY

SETTING UP MULTICHANNEL SYSTEMS

MODULAR SOLUTIONS FOR PROFESSIONAL REQUIREMENTS

Calculating intermodulation-free radio fre- quencies requires an enormous amount of computing power. AKG used up to 150 computers operating day and night to cal- culate new sets of carrier frequencies

unless the computers were needed for other purposes. The results are available to all users of AKG wireless systems on the Internet at www.akg.com/frequencies. The Frequency Management Program available

on the AKG homepage lets you check all the radio frequencies you are planning to use for compatibility, making it easy to set up an AKG multichannel system that works perfectly from the start.

www.akgfrequency.at

The AKG Frequency Management Program checks all the radio links you are planning to use for compatibility and potential intermodulation problems.

To make sure your wireless system will operate smoothly, we recommend checking both the frequencies your system is going to use and the frequencies of local radio and TV sta- tions, etc. with this program before setting up the system.

Frequency bands

Each of the six bands contains legal frequencies and pre- sets for reliable, intermodulation-free operation. Special frequency versions within each band are available on request. An optional programmer allows AKG staff to pro- gram these frequencies either on location (one user pre- set) or at your local AKG Service Center (all presets).

BAND 1

650-680

MHz

BAND 2

680-710

MHz

BAND 3

720-750

MHz

BAND 4

760-790

MHz

BAND 5

790-820

MHz

BAND 6

835-863

MHz

RF output (ERP)

The HT 4000 and PT 4000 transmitters are available in three different RF output versions. Each transmitter is delivered with the maximum RF output (ERP) approved for the country or region where it will be used. The RF output of a transmitter can be changed, but this can only be done by AKG Vienna.

Multichannel example 1

Each frequency band is 30 MHz wide and comprises up to 18 intermodulation-free frequencies (depending on local frequency plans). If you need more than 18 frequencies, you can use several bands. Make sure to select bands with the widest possible frequency spacing between them.

10 mW	20 mW	50 mW
ERP*	ERP *	ERP *

* ERP = Equivalent Radiated Power

BAND 1	+	BAND 3	+	BAND 5	= 54 channels**
18 channels		18 channels		18 channels

Multichannel example 2

Where local frequency plans limit the available frequency range to two bands, you can still set up a large multi- channel system. Bands 1 and 2 together provide about 25 usable frequencies in this example. Again, use bands with the widest possible spacing between them!

BAND 1

+

BAND 2

= approx. 25 channels**

** depending on optimum antenna placement

46 www.akg.com