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6 CX133: I

NSTALLATION AND OPERATION MANUAL

12 Zone Outputs

The two stereo output zones have balanced output stages using 3 pin XLR type connectors

and can operate into loads as low as 600Ω. The nominal output level is 0dBu (775mV) but

the CX133 can operate with a wide range of signal levels up to a maximum output of +20dBu

(7.75V). A 3-pin XLR type female connector is required for each output.

OUTPUT

TERMINATION

BALANCED UNBALANCED

HOT (+)

GROUND (SCREEN)

NO CONNECTION TO PIN 3

GROUND (SCREEN)

REV - PHASE (-)

IN - PHASE (+)

Figure 7

For balanced interconnections, 2-core screened cable should be used. Connect the cable

screen to pin 1. Pin 2 is the in phase signal (normally red) and pin 3 is the reverse phase

signal (normally blue or black). If you plan to connect any zone output to an unbalanced

load, see section 15.4 'Unbalanced Mode'. Full connection details are printed on the

underside of the CX133.

12.1 Music Equalisation

Both Zone 1 and Zone 2 have separate pre-set treble and bass controls for the music signals

only. These pre-set controls are located on the rear panel adjacent to the respective zone

output sockets. The music treble control has a range of ±10dB at 10kHz and the music bass

control operates with a range of ±10dB at 50Hz.

13 Utility Output

The CX133 is fitted with a fixed level, balanced output primarily intended to provide a mono

signal for utility areas such as toilets and foyers where it is desirable to feed a music + mic

programme at a constant level, totally independent of the variable programmes of Zone 1&2.

Figure 8

The utility output has a choice of three input sources, selected by a PCB mounted jumper.

The CX133 leaves the factory configured to provide a music signal derived from the Zone 1

music source selector (pre-level control). Alternatively, the jumper J8 can be set to source

the music signal directly from the Line 1 input (see Figure 8). A pre-set microphone level

control, positioned adjacent to the output socket can be set to provide microphone signals at

the optimum level; if the priority function is switched on, the music signals will attenuate

when an announcement is made. If the music source jumpers are removed, the output can

be used as a microphone only signal to serve areas requiring music free announcements.

29/05/02 V9

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