User manual SOUNDCRAFT MH4

[. . . ] All rights reserved Parts of the design of this product may be protected by worldwide patents. ZM0296 Issue 2 Soundcraft is a trading division of Harman International Industries Ltd. Information in this manual is subject to change without notice and does not represent a commitment on the part of the vendor. Soundcraft shall not be liable for any loss or damage whatsoever arising from the use of information or any error contained in this manual, or through any mis-operation or fault in hardware contained in the product. [. . . ] Fader The 60mm output fader controls the level of the signal from the Aux bus fed to the Aux output, with 10dB of gain at maximum. The Aux output itself is electronically balanced at 0dBu, on a male XLR on the rearcon. MUTE The main output MUTE switch mutes the signal to the Aux output and MIX and C busses (if routed). The Mute switch is controlled by the mute group and snapshot automation systems, but not the solo-in-place system. The MUTE switch can be toggled if Preview mode is enabled on the console, to edit a mute group or scene, and will not affect the audio. SAFE/PREV LED The SAFE/PREV LED is used to indicate the Mute safe status of the console or Preview mute status, if the console is in preview mode. The group/aux is toggled in or out of safe mode using the MUTE switch, after first engaging EDIT SAFES mode on the master cpu panel. Preview status is indicated by flashing illumination, upon entering Preview mode from the master cpu panel, if the Mute is present in the previewed mute group or scene. 4 - 16 AFL The AFL switch feeds the post fade output signal to the stereo AFL busses. The AFL signal is actually derived from the Output Pan control -this allows a stereo AFL signal to be generated which is likely to be appropriate to the application. EG: If using as stereo auxes, the pan pots can be turned hard left and right on adjacent outputs and this will generate a stereo AFL, if both adjacent AFL buttons are pressed. Adjacent AFL switches can be linked so that pressing one will automatically select both; to do this, press and hold the first AFL switch, then press the second. If using separate mono auxes, the pan pots can be centred to give mono image from each AFL button. If a pair of adjacent AFL switches have been linked, they act as one switch as far as Autocancel is concerned. If INPUT PRIORITY is enabled on the master fader panel then any active input SOLOs will replace the output AFL signal, and the output will not be heard until the inputs are un-SOLOed. Pressing an AFL switch will also send a MIDI message to an attached BSS varicurve or dbx DriveRack system, instructing them to select the appropriate channel of EQ for control on the BSS/dbx remote unit. Routing To The Mix The Aux to mix MIX and C switches route the post-fade, post mute output signal to the stereo Mix L, R and C busses respectively. The feed to the stereo mix bus is taken via the PAN control which has a 3dB centre drop. TB/OSC The latching TB/OSC switch feeds the signal from the talkback mic or oscillator (located on the master module) to the Aux output and is injected onto the bus with no dimming of the Aux signal. The TALK or OSCILLATOR INT buttons on the master module must also be switched on to enable this operation. Meters The Group/Aux output level is metered by one of 8 VU meters in the overbridge. Three bank select switches on the master module determine whether the 8 Mono/Stereo Aux/Groups, 8 Auxes or the 8 Matrix outputs are fed to the meters. Matrix Sends The matrix send pots feed the odd-numbered Aux output signal (left-hand column of knobs) or the even-numbered Aux output (right-hand column of knobs) to the Matrix output M1-8. [. . . ] These signals are from balanced 1/4" jacks on the rear panel, and are added directly to the busses, at unity gain. SOLO L, R Bus Outputs are also provided, for use when linking consoles: these are balanced on male XLRs and are fed from the output of the summing amps. See page 5 - 12 for full details of console linking. 4 - 32 Output/Input Levels MIX, ALT L/R, CENTRE, OSC, EXT TB, MNTR L/R, SOLO L, R OUTPUTS Nominal level: Maximum output level: Output Impedance: 0dBu +21dBu into 2k ohms <75 ohms EXT TB OUTPUT (Electronically Balanced, with 15V common mode dc voltage) Nominal level: Maximum output level: Output Impedance: 0dBu +21dBu into 2k ohms <75 ohms EXT TB, 2TK L, R INPUTS, BUS INPUTS: MIX L, R, CENTRE, SOLO L, R Nominal level: Maximum Input level Input impedance MIX L/R, CENTRE INSERT SENDS Nominal level: Maximum output level: Output Impedance: MIX L/R, CENTRE INSERT RETURNS Nominal level: Maximum Input level Input impedance PHONES OUTPUT Output Impedance Max Output 50 ohms +20dBu into 400 ohms, +14dBu into 50 ohms 0dBu +21dBu >10Kohms 0dBu +21dBu into 2k ohms <75 ohms 0dBu +21dBu >10k ohms 4 - 33 Rear Connectors MIX, ALT L/R, Centre, Osc, Ext TB, Mntr L/R outputs, SOLO L, R Outputs (3 pin male XLR) Pin 1 Pin 2 Pin 3 Pin 1 Pin 2 Pin 3 Ground Signal Hot Signal Cold Intercom Ground Intercom Power (Not used) Intercom Signal CLEARCOM IN (3 pin female XLR) & CLEARCOM THRU( 3 pin male XLR) MIX L/R and Centre Insert Sends, Insert Returns, SOLO L, R Inputs, 2TK L, R Inputs, MIX L, R and Centre Bus Inputs (1/4" TSR jack) Tip Ring Sleeve Tip Ring Sleeve Tip Ring Sleeve Signal Hot Signal Cold Ground Signal Hot Signal Cold Ground Left Right Ground EXT TB Input, TB Mic Input (3 pin female XLR) Phones Output (1/4" TSR jack) 4 - 34 VU Meterbridge The Meterbridge is not designed to be removable from the console. Meters Three large VU meters with integral Peak LEDs meter the Mix left, right and Centre output signals. The left and right meters are sourced from the monitor section of the master modules, and they will automatically switch over to read PFL/AFL signals. [. . . ]