CX242 Zone Mixer Installation & User Guide V4.
1 CX242: INSTALLATION AND OPERATION MANUAL CX242 Zone Mixer Installation and operation manual Contents Section 1 Introduction ...............................................................................2 2 Schematic Diagram...................................................................2 3 Zone Configuration Controls .....................................................3 4 4.01 4.02 4.03 4.04 Music Inputs..............................................................................
2 CX242: INSTALLATION 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 35oC 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.
3 CX242: INSTALLATION AND OPERATION MANUAL 3 Zone Configuration Controls Pre-set switches and controls protected by the anti-tamper panel: 1 2 3 + REM PR M2 MICS L4 PR + 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 15/07/02 V4 10 11 5 + LF 0 6 + HF 0 + 7 8 LF 0 + 0 0 Z1 MUSIC + HF 0 PR M1 Z1 MONO 4 PR M1 PR M2 Z2 MICS L4 PR MONO + 0 REM 0 HF LF HF 12 13 14 LF 15 Z2 MUSIC 16 17 18 Mic 1 priority on/off in Zone 1 - Button out = off, button in = on Mic 2 pri
CX242: INSTALLATION AND OPERATION MANUAL 4 4 Music Inputs The unit has four stereo line inputs which are suitable for most music sources such as compact disc players, tape players and tuners etc. All inputs are unbalanced and use RCA phono sockets. The input impedance is 100k ohms. 4.01 Sensitivity & Gain Control All four stereo line inputs have a pre-set gain control on the rear panel adjacent to the respective input sockets.
5 CX242: INSTALLATION AND OPERATION MANUAL When local control is selected, the front panel signal source switch is operative and the front panel music level control adjusts the level of the left output socket; the signal level of the right output socket can be controlled by a remote level control plate. With no plate fitted, the right output operates with mic signals only.
CX242: INSTALLATION AND OPERATION MANUAL 5 Microphone Inputs 5.01 Mic Inputs 6 Two microphone inputs are provided and the microphone amplifier is an electronically balanced, transformerless design configured for optimum low noise performance. The input impedance is greater than 2k and is suitable for microphones in the 200 to 600 ohm range. Inputs are via gold plated 3 pin XLR type connectors with latch, which are positioned on the rear panel.
CX242: INSTALLATION AND OPERATION MANUAL 6.01 7 Equalisation Both Zone 1 and Zone 2 have separate treble and bass controls for the music signals and the microphone signals. These pre-set controls are protected by the front panel mounted anti-tamper panel. The music treble control has a range of ±10dB at 10kHz and the music bass control operates with a range of ±10dB at 50Hz. The microphone tone controls operate at ±10dB at the frequencies of 8kHz and 100Hz. 6.
8 CX242: INSTALLATION AND OPERATION MANUAL 8 Expansion Connector Two CX242's can be linked by fitting the optional 'Expansion Connector Kit'. The multicore link duplicates the two mic and four line signals derived from the source CX242 onto the respective input stages of a second CX242. This simplifies the interconnection of two units which are required to control the same input signals and distribute these to four stereo zones.
CX242: INSTALLATION AND OPERATION MANUAL 9 9 General Notes 9.01 Earthing The 0V rail of the CX242 is coupled to the chassis ground by a parallel resistor/capacitor network and no interconnection problems should be encountered. When several mains powered units are connected together via their signal cables, there is a risk of one or more earth loops which may cause an audible hum on the system even with the gain controls set to minimum.
10 CX242: INSTALLATION AND OPERATION MANUAL With no external connection to pin 3, an internal 15k resistor connected to the +15V power will ‘pull up’ the source select control voltage and the ‘off’ position will be selected. The output impedance of the control voltage source should be low enough to overcome the influence of this resistor. If you require to fix the music signal to the Line 1 input, wire a 20k resistor between pins 1 & 3 on the remote control connector.
11 CX242: INSTALLATION AND OPERATION MANUAL 12 General Specifications Remote music mute attenuation Remote music mute connection Line 4 priority release time Power consumption Power requirements Fuse rating Fuse type Width Height Depth Weight Adjustable -20dB to -70dB 2 core cable to isolated relay contacts Adjustable 3, 6 or 12 seconds 15VA 230V±10% or 115V±10% T100mA H for 230V input T200mA H for 115V input 20mm x 5mm class 3 T 250V 482.60mm 44mm 160mm 3.
