Cloud CX133 Installation & User Manual

CX133 Zone Mixer

Installation & User Guide

V9.0

Cloud Electronics Limited

140 Staniforth Road, Sheffield, S9 3HF England

Tel + 44 (0) 114 244 7051

Fax + 44 (0) 114 242 5462

E-mail

[e-mail]

Web site http://www.cloud.co.uk

CX133: I

NSTALLATION AND OPERATION MANUAL

1

CX133 ZONE MIXER

Installation and operation manual

Contents

Section

Page

1 Safety Notes...............................................................................2

2 General Description ...................................................................2

3 Schematic Diagram....................................................................2

4 Music Inputs ...............................................................................2

4.1 Sensitivity & Gain Control.....................................................2

4.2 Music Source Select.............................................................3

4.3 Music Level Control, Local or Remote..................................3

5 Mono Operation .........................................................................4

6 Music Priority..............................................................................4

7 Microphone Input .......................................................................5

7.01 Microphone Input ...............................................................5

7.02 Gain Control ....................................................................... 5

8 Front Panel Level Controls......................................................... 5

9 Microphone Equalisation ............................................................5

10 Microphone Priority ....................................................................5

11 Inhibiting Mic or Music Sections ................................................. 5

12 Zone outputs ..............................................................................6

12.1 Music Equalisation .............................................................6

13 Utility Output...............................................................................6

14 Music Mute (Fire Alarm Interface) ..............................................7

15 General Notes ............................................................................7

15.1 Multi-zone Applications ......................................................7

15.2 EMC Considerations ..........................................................7

15.3 Earthing..............................................................................7

15.4 Unbalanced Mode ..............................................................8

16 Technical Specifications.............................................................8

17 General Specifications ...............................................................8

29/05/02 V9

2 CX133: I

NSTALLATION AND OPERATION MANUAL

1 Safety Notes

• Do not expose the unit to water or moisture

• Do not expose the unit to naked flames.

• Do not block or restrict any air vent

• Do not operate the unit in ambient temperatures above 35

o

C

• Do not perform any internal adjustments unless you are qualified to do so and fully
understand the hazards associated with mains operated equipment.

• The unit has no user serviceable parts. Refer any servicing to qualified service
personnel.

• If the moulded plug is cut off the lead for any reason, the discarded plug is a
potential hazard and should be disposed of in a responsible manner.

For more detailed information refer to the rear of the manual.

2 General Description

The Cloud CX133 is versatile audio mixer with applications in Licensed, Retail and Leisure
venues. The unit has facilities for three stereo line signals and one microphone signal that
can be fed, in stereo, to two areas, each with a front panel mounted music source select
switch and adjacent music level and microphone level controls. In addition, a fixed level
‘Utility’ output is provided to serve general utility areas such as toilets and foyers etc. All pre­set controls are located on the rear panel with additional configuration jumpers mounted on
the printed circuit board. Remote level controls can be wired to the two stereo zones for
applications that require remote control of the music level.

3 Schematic diagram

4 Music Inputs

The unit has three stereo line inputs; these are suitable for most music sources such as
compact disc players, tape players, satellite receivers and the like. All inputs are unbalanced
and use RCA phono sockets. The input impedance is 47k ohms. The Line 3 input can be
configured to have priority over any other music source, see section 6.

4.1 Sensitivity & Gain Control

All three stereo line inputs have a pre-set gain control on the rear panel adjacent to the
respective input socket. The gain control has a range of 20dB allowing the input sensitivity to
be varied from -12dBu (200mV) to +8dBu (2.0V). The pre-set gain control should be set so
that all the input signals are operating at the same level and that the front panel level control
has an optimum range of control.

29/05/02 V9