CXM Mixer Installation & User Guide Cloud Electronics Limited 140 Staniforth Road, Sheffield, S9 3HF England Tel +44 (0)114 244 7051 Fax +44 (0)114 242 5462 e-mail info@cloud.co.uk web site http://www.cloud.co.
CXM Technical MANUAL 1 CXM MODULAR MIXER Technical manual Contents Section Page 1 General ........................................................................................................ 3 1.01 1.02 1.03 General Description ........................................................................................ 3 Main Frame ..................................................................................................... 3 Power Supply ......................................................
CXM Technical MANUAL 4 2 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 4.18 M2 Master Module................................................................................. 11 X-Filter........................................................................................................... 12 Crossfade ...................................................................................................... 12 Chopfade.................................................
CXM Technical MANUAL 1 1.01 3 General Description The Cloud CXM mixer is primarily designed for 'live' discotheque use, yet it is equipped with such flexible facilities that it may successfully be used in a wide range of applications such as broadcast and production studios. The console has advanced specifications and rugged construction. Its compact dimensions make effective use of limited space such as in DJ booths and small studios. 1.
CXM Technical MANUAL 4 The PSU 1040 can be modified to operate from a supply of 110 - 120V by removing the internal link marked '240V' and fitting two adjacent links marked '110 - 120V'. The 220 240V fuse rating of T500mA should be changed to T1A for 110 - 120V operation. Adequate ventilation must be provided to ensure safe and reliable operation of this power supply. Remember that the PSU 1040 has a captive output lead, which is 900mm long, this factor must be considered when positioning the PSU.
CXM Technical MANUAL 5 CS1 Stereo Music Module 2.01 This module contains RIAA equalised phono and line level amplifiers, sub-sonic filter, equaliser, auxiliary sends, channel fader, crossfade assign, mono switch, PFL select logic and remote start switch. Inputs are by way of gold plated RCA phono sockets. 2.02 Input Amplifier Equalisation Two input amplifiers are fitted. The RIAA equalised phono input has an input impedance of 47kΩ, loaded with a capacitance of 220pF.
CXM Technical MANUAL 6 2.08 Stereo/mono A mono switch is included and this simply links the two stereo signals, the adjacent LED illuminates when the signals are linked. 2.09 Crossfade Assignment Two crossfade assign switches are provided; with both switch A and switch B in the off position, stereo signals are routed to bypass the crossfade circuitry. Switch A routes signals to channel A and similarly switch B to channel B; adjacent LED's indicate the selected channel.
CXM Technical MANUAL 7 2.16 PCB Jumpers The locations of the PCB configuration jumpers can be seen on the diagram to the left. The list below explains each jumper, its approximate position and default settings. J1 Left Phono Input Select, located on overhead PCB, factory set to RIAA equalisation. 3 possible settings, RIAA, 0dBu or -10dBu. Unpredictable input gain and EQ will be evident if this jumper header is missing.
CXM Technical MANUAL 8 CM1 Microphone module 3.01 The CM1 module contains a low noise balanced microphone amplifier with line level switching, a 100Hz high pass filter, 3 band equalisation, line level insert, 2 auxiliary sends, Pan control, PFL select, Peak LED, channel fader and mute switch. 3.02 The microphone amplifier is an electronically balanced, transformerless design, configured for optimum low noise performance.
CXM Technical MANUAL 9 3.08 The equaliser circuitry can be switched in or out of the signal path by simply configuring a PCB jumper. This operates independently of the 100Hz high pass filter. 3.09 Auxiliary Sends 2 auxiliary sends are provided and can be individually configured to operate in the pre-fade or post-fade mode by simply reversing a PCB jumper (see detail).
CXM Technical MANUAL 10 3.16 PCB Jumpers The locations of the PCB configuration jumpers can be seen on the diagram to the left. The list below explains each jumper, its approximate position and default settings. Equalisation jumper, located next to the insert jack socket, factory set in the active position. 2 possible settings; EQ active or defeated. No output will be possible from this channel if this jumper header is missing.
CXM Technical MANUAL M2 Master Module 11
CXM Technical MANUAL 12 4.01 X-Filter When used in conjunction with the crossfade the X-Filter facility on the M2 allows the user to mix selected bands of frequencies from one crossfade busbar together with selected frequencies from the other busbar. The three X-Filter buttons on the left-hand side can be used to remove any combination of top, mid and low frequencies from the signal on the A busbar. The three buttons on the right provide the same function for the B busbar.
CXM Technical MANUAL 13 required, with a 6dB loss in gain (see 6.02 Unbalanced Mode). The CXM M2 is designed to interface with equipment requiring OdBu (775mV) signal level and has both gain and headroom margins to successfully match a wide range of ancillary equipment. 4.08 Output 2 The output 2 section is primarily intended to provide an extra output zone, as such it is very similar to the main output. Level control of the mic and music signals is achieved by means of two independent rotary controls.
CXM Technical MANUAL 14 4.14 PFL Output A -2dBu PFL output is provided on a stereo pair of phono sockets. This signal is derived from the PFL and split cue circuits. The output is identical to the signal on the headphone output though it is not affected by the phones volume control. 4.15 Remote Music Mute In certain circumstances, there may be a local authority or Fire Service requirement to mute the Music Signals via a Fire alarm control panel in an alarm condition.
CXM Technical MANUAL 4.18 15 Sound to Light Output This fully floating, transformer coupled output facility can be used to trigger sound to light controllers. The signal is derived from the main output and is rated at +10dBu (2.45V) with a minimum load of 600Ω. Connection is by way of a 2 pole 1/4" jack socket.
CXM Technical MANUAL 16 M2 Master Module Rear Panel Connections
CXM Technical MANUAL 17 CZ1 Zone Module 5.01 The CZ1 Module extends the output facilities of the M1 or M2 Master module by providing an extra 3 output zones with independent control of microphone and music levels. 5.02 Zone 1 Two faders are provided to independently control the output level of the microphone and music signals.
CXM Technical MANUAL CZ1 Zone Module 18
CXM Technical MANUAL 19 General 6.01 Interfacing a tape deck for recording purposes. The M2 master module is fitted with a total of two stereo pairs of record output sockets, all using RCA type phono sockets. One pair carry the main output signal: this output is controlled by the master faders and the system must be operated normally with master faders open sufficiently to give a satisfactory recording level. The other pair of record outputs carry music only, pre-master fader signals.
CXM Technical MANUAL 20 Service and Configuration Access to the inside of the CXM mixer will not normally be required. If any servicing should become necessary or the factory jumpers need re-configuring, then this should only be carried out by qualified service personnel. 7.01 Module removal It may be necessary to remove certain modules to configure the circuitry or routine maintenance etc. All modules can be removed from the front, proceed as follows:1. 2. 3.
CXM Technical MANUAL 21 This product conforms to the following European Standards: EN 50081-1:1992 EN 50082-1:1992 EN 60065:1994 Safety Considerations THIS UNIT MUST BE EARTHED. ENSURE THAT THE MAINS POWER SUPPLY PROVIDES AN EFFECTIVE EARTH CONNECTION USING A THREE WIRE TERMINATION. Caution - Mains Fuse TO REDUCE THE RISK OF FIRE, REPLACE THE MAINS FUSE ONLY WITH THE SAME TYPE AND RATING, WHICH MUST BE A CLASS 3, 250V TIME DELAY TYPE, RATED AT 500mA WHERE THE MAINS INPUT VOLTAGE IS SET TO 230V.
