AKG SRA 1 User Manual download pdf

WMS 81

UHF Wireless Microphone System

Description

The WMS 81 wireless microphone system comprises a

transmitter (bodypack or handheld), a receiver and optional

accessories. 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 receiver’s output. Audio bandwidth

extends from 50 Hz to 20 kHz. Through digital diversity

reception, the performance 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. Fifteen frequencies are

available in each of twelve UHF channels that occupy the range

of 710.2 - 745.6 MHz. Because of some frequency overlap, and

the recommendation that adjacent sub-channels not be used in

a given installation, the user may expect approximately 14

usable channels in a given multiple receiver installation.

The PT 81 bodypack and HT handheld models are

hours can be expected from alkaline 1.5 volt cells. The PT 81

accepts both microphone and line level input signals, and

input sensitivity can be selected for optimum transmission.

The PT 81 accommodates a variety of lavalier and

headworn microphones as well as electronic instruments

such as guitars and keyboards via the MK/GL guitar cable.

The D 880 WL1, D 3800 WL1 and C 535 WL1, three

modular versions of AKG’s most popular handheld vocal

mics, are available as modular heads for the HT 81.

The HT 81 handheld transmitter has the following controls:

power on/off, microphone mute, input sensitivity control, and

selection of the desired transmitting frequency. Powering of

the handheld transmitters is the same as for the bodypack.

The SR 81 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 81 comes from the factory with

the chosen UHF bandwidth containing a set of 15 preset

operating frequencies. The SR 81 is a digital diversity

receiver which uses a microprocessor to monitor signal

strength and silently switch between antennae.

The SR 81 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 81 comes from the factory with

the chosen UHF bandwidth containing a set of 15 preset

operating frequencies. The SR 81 is a digital diversity

receiver which uses a microprocessor controlled switch. This

provides optimum signal reception.

Controls on the SR 81 include: carrier frequency selection,

and output level control. Indicators on the unit include: RF

mute, audio input level, RF strength, diversity LEDs, and

transmitter battery status. Squelching action is made

automatic by use of AKG’s TCSQ

(tone code squelch)

circuitry. Each SR 81 is provided with two 1/4 wave diversity

antennae; however when a number of receivers are used in a

single installation it is advised to use the optional powered

antenna accessories. Up to ten receivers can be fed by a

single pair of powered antennae.

Features

• Factory matched and optimized

transmitter/receiver frequency sets

• Digital diversity reception

• Dynamic range >100 dB

• Simple, foolproof setup procedure

• Both bodypack and handheld

microphone transmitters available

• 14 intermodulation-free UHF

channels with multiple receivers

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Summary of Contents

Page 1 - Features

WMS 81UHF Wireless Microphone SystemDescriptionThe WMS 81 wireless microphone system comprises atransmitter (bodypack or handheld), a receiver and opt

Page 2 - Specifications

SpecificationsPT 81 bodypack transmitter:Audio bandwidth: 50 Hz to 20 kHzModulation method: FMRadiated RF power: 10 mWFrequency stability: ±10 ppmAnte

Page 3 - Graphical Data

AKG is constantly improving and modifying its products, therefore, specifications are subject to change without notice.Graphical Data110V/AC110V/AC110

Page 4

AKG is constantly improving and modifying its products, therefore, specifications are subject to change without notice.Graphical DataSR 81PT 815.42”(1