AKG Acoustics Microphone WMS 300 User Manual

WMS 300  
Microphone System  
Description  
The WMS 300 wireless microphone comprises a  
transmitter bodypack, four transmitter handheld microphone  
models, and a receiver. The bodypack and handheld  
transmitters have the same transmission characteristics, with  
a maximum radiated power of 10 milliwatts. Through signal  
companding (compression and expansion), a dynamic range  
greater than 100 dB is attained at the receivers output. Audio  
bandwidth of the system is uniform over a wide range in  
typical performance spaces, extending up to distances of  
330 feet (100 meters). Individual handheld microphone and  
bodypack transmitters are factory matched to a given  
receiver. Each set provides a 20 MHz-wide UHF send-receive  
channel, each with 16 sets of sub-channels for microphone  
use. In the U. S., a total of eight sets of 20 MHz channels  
may be chosen from. Because of some channel overlap, and  
the recommendation that adjacent sub-channels not be used  
in a given installation, the user may expect 16 usable  
channels in a given installation. The Model PT 300 bodypack  
is powered by 3 AA batteries, and normal battery life of 10 to  
12 hours can be expected from standard 1.5 volt cells.  
The PT 300 accepts both microphone and line level input  
signals, and four values of input sensitivity can be selected  
for optimum transmission. The antenna is a quarter-  
wavelength wire, affording easy concealment and  
comfortable wearing. Four of AKGs most popular handheld  
"vocal" microphone head units are incorporated into the  
handheld transmitting models. The microphones are the  
models D 3700, D 3800, C 5900, and C 535 EB. The  
handheld transmitters have the following controls: power  
on/off, microphone mute, and input sensitivity control. In  
addition, a DIP switch provides for simple setting of the  
desired transmitting frequency, and LEDs indicate low battery  
and signal overload. Powering of the handheld transmitters is  
the same as for the bodypack.  
The SR 300 receiving unit is one standard rack unit high  
and one-half rack unit wide. Thus, two receiving units can be  
placed side by side. Each SR 300 comes from the factory  
with a 20 MHz-wide UHF channel containing a set of 16  
preset operating frequencies.  
The SR 300 operates as a true diversity receiver, in which  
two completely separate receiver-demodulator sections are  
operating at all times. The output of the system is the receiver  
that has the widest dynamic range, and the switching from  
one receiver to the other is absolutely noiseless.  
Features  
• Factory matched and optimized  
transmitter/receiver frequency  
group  
True diversity reception  
Controls on the SR 300 include: squelch threshold adjust,  
carrier frequency selection, and output level control.  
Indicators on the unit include: mute, audio overload, RF, and  
diversity LEDs, Each SR300 can accommodate a pair of  
diversity antennas: however, when a number of receivers are  
used in a single installation, a master antenna pair (with  
booster) can be used and fed to all receivers.  
• Dynamic range > 100 dB  
• Simple, foolproof setup procedure  
• Both bodypack and handheld  
microphone transmitters available  
• 32 channels available  
for U. S. usage  
A wide range of accessories is provided for operational  
flexibility and ease of installation.  
 
Architects and Engineers Specifications  
The wireless microphone system shall operate over the UHF  
frequency range from 766 to 805 MHz range, with transmitter  
power not exceeding 10 milliwatts. Both handheld and  
bodypack type transmitters shall be provided. The bodypack  
transmitter shall accommodate both microphone and line level  
isolation shall be at least 60 dB, and total harmonic distortion at  
1 kHz for rated deviation shall be no greater than 0.8%. The  
receiver shall provide for a manual squelch adjustment for  
optimum system operation. An output level adjustment shall be  
provided, and there shall be both balanced XLR-M output and  
inputs. The transmitters shall operate with a companding system unbalanced 0.25 in. (6.5 mm) jack.  
that is complemented by the receiver, providing an A-weighted  
system dynamic range in excess of 100 dB. The transmitters  
shall indicate input overload and low battery power. Handheld  
The wireless microphone system shall incorporate factory optimized  
sets of both sending and receiving frequency modules that are built into  
both transmitters and receivers. Each frequency set shall comprise a 20  
transmitters shall have a maximum diameter of 2.125 in. (53 mm) MHz UHF band and offer at least 16 discrete operating frequencies within  
and a length, including antenna, no greater that 11.125 in. (282  
mm). The receiver shall operate on the true diversity principle,  
and that action shall be inaudible as such. Adjacent channel  
that band. The wireless microphone system shall be the AKG Acoustics  
Model WMS 300.  
Graphical Data  
Accessories: RMU2A  
2-Unit rack mount mainframe with passive splitter  
RMU2  
P300  
1-Unit rack mount mainframe  
System antenna splitter  
RA300B Remote antenna for antenna splitter  
or consequential damages. However, the limitation of any right or remedy shall not be effective  
where such is prohibited or restricted by law. Simply take or ship your AKG product prepaid to our  
service department. Be sure to include your sales slip as proof of purchase date. (We will not repair  
transit damage under the no-charge terms of this warranty.) Note: No other warranty, written or oral  
is authorized by AKG Acoustics, Inc. This warranty gives you specific legal rights, and you may also  
have other rights which vary from state to state. Some states do not allow the exclusion or  
limitation of incidental or consequential damages or limitation on how long an implied warranty  
lasts, so the above exclusions and limitation may not apply to you.  
Limited Warranty  
Valid only in the United States. AKG Acoustics warrants AKG products against defects in material  
or workmanship for a period of two years from the date of original purchase for use, and agrees to  
repair or, at our option, replace any defective unit without charge for either parts or labor. Important:  
This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable  
care, the affixing of any attachment not provided with the product, loss of parts or connecting the  
product to any but the specified receptacles. This warranty is void unless service or repairs are  
performed by an authorized service center. No responsibility is assumed for any special, incidental  
Microphones · Headphones · Wireless Microphones · Wireless Headphones · Headsets · Electroacoustical Components  
AKG Acoustics GmbH  
Lemböckgasse 21–25, P.O.B. 158, A-1230  
Vienna/AUSTRIA  
Tel: (43 1) 86 654-0*, Fax: (43 1) 86 654-516  
AKG ACOUSTICS, U.S.  
914 Airpark Center Drive  
Nashville, TN 37217, U.S.A.  
Tel: (615) 620-3800, Fax: (615) 620-3875  
Studer Japan Ltd.  
AKG Acoustics; A Division of Harman Pro Germany  
Bodenseestraße 228, D-81243 München/GERMANY  
Tel: (089) 87 16-0, Fax: (089) 87 16-200  
2-43-7, Uehara, Shibuya-ku, Tokyo 151-0064/JAPAN  
Tel: (813) 3465-2211, Fax: (813) 3465-2214  
Erikson Pro Audio  
Arbiter Pro Audio  
Wilberforce Road, London NW9 6AX/ENGLAND  
Tel: (0181) 202 1199, Fax: (0181) 202 7076  
620 McCaffrey, St-Laurent, Quebec, H4T 1N1, CANADA  
Tel: (514) 738-3000, Fax: (514) 737-5069  
Specifications subject to change without notice.  
DS-WMS 300  
 

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