User manual SOUNDCRAFT MBI SERIES 10 V2

[. . . ] 1992, 1993 All rights reserved Parts of the design of this product may be protected by worldwide patents. Issue 2 Part No. ZM0004 Information in this manual is subject to change without notice and does not represent a commitment on the part of the vendor. shall not be liable for any loss or damage whatsoever arising from the use of information or any error contained in this manual. No part of this manual may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, electrical, mechanical, optical, chemical, including photocopying and recording, for any purpose without the express written permission of Soundcraft Electronics Ltd. [. . . ] The input to the channel will be on-air whenever the Fader is open (unless the cough switch is closed). Note: Each Mono Input channel can be configured as a Local or Distant channel. This controls which monitor circuit will be muted when the channel's Fader is opened and the mic is selected. Specifications Microphone Input Electronically balanced Input Impedance Maximum I/P level Sensitivity Range CMRR EIN Line Input Electronically balanced Input Impedance Input Range Equalisation LF MF HF General Insert Send Level THD >20k -10dBu to 0dBu >1. 5k -2dBu -70dBu to -23dBu >100dB @70dB gain -128dB, 200R source +/- 10dB shelving at 180Hz 10dB cut and boost at 3kHz +/-10dB shelving at 8. 5kHz -6dBu 0. 006% @1kHz 0dBu 26 Mono Input Channel Telco Channel Description & Operation Specification Telco Channel 27 7HOFR&KDQQHO 1 Input Stage 2 The Telco module must be connected to the telephone system via a telephone hybrid circuit. The Applications section of this manual gives more details. 3 1 The LINE input is a female XLR into which the output from an external telephone hybrid may be plugged. 2 The C/F (Clean Feed) output is a male XLR connector which may be plugged into the input of an external telephone hybrid. The Clean Feed signal (also known as Mix Minus) is the programme output signal minus the phone signal. 3 REMOTES Socket This 25-way D-type female connector allows you to implement the following facilities: Telephone Divert See Divert Switch. 4 5 6 7 8 Talkback Enable This user-provided switch will, when closed, cause the Caller to hear a reduced programme output plus the signal on the T/B OUTPUT bus. This bus will have the signal from the inbuilt mic plus the signal from any of the Mono Input modules if their respective Talkback Switches are closed (see the Applications section). It consists of a balanced audio input and also two contacts which may be shorted via a user-provided switch. When the switch is closed the Caller will hear a reduced programme plus the input to the External Talkback circuit (see the Applications section). 9 10 11 12 13 14 15 4 LINE (Coarse Adjust) allows the coarse adjustment of the Line input level. 5 C/F (Coarse Adjust) allows for the reduction, to a minimum, of the Caller's signal in the Clean Feed output. 6 The DIVERT switch on the module is a 1-pole 2-way switch; these connections are available on the Remote socket. It is possible to connect this switch to the external telephone hybrid to enable the Caller to be diverted to, for example, a standard telephone. You will need to consult the telephone hybrid circuit's handbook for its requirements. 16 Auxiliary Send 7 The AUX control routes the Caller's signal onto the Auxiliary Mix bus. The signal may be fed to the Auxiliary control either pre-fade or post-fade. The factory default is pre-fade but this may be changed via a link on the pcb (see the Applications 28 Telco Channel section). Optional Equaliser 8 The HF EQ control provides high frequency (above 8. 5kHz) boost and cut of +/-10dB. The MF EQ control provides medium frequency boost and cut of +/-10dB at 3kHz. The LF EQ control provides low frequency (below 180Hz) boost and cut of +/-10dB. 9 When the EQ switch is depressed, the EQ section, described above, is switched into the signal path. 10 When the 80Hz switch is depressed an 80Hz high-pass filter is switched into the signal path. This control is useful for filtering-out low frequency hum. Level Control 11 The PAN control determines the position of the signal within the stereo image. Rotation fully anticlockwise feeds the signal solely to the PROGRAM MIX L bus, whilst rotation clockwise sweeps the image to the PROGRAM MIX R bus. 13 The PEAK LED glows to give a warning of possible overload. Cueing 14 When the COMM circuit is active the Caller will hear a reduced programme plus the signal on the T/B OUTPUT bus. [. . . ] Note: Ext 1 is the default input which is selected at power up. Talkback 11 When the STUD switch is depressed the Studio Headphones and Monitor circuits will have their existing sources replaced by the signal from the inbuilt MIC summed with the T/B MIX bus. Note: the switch is non-latching; it also does not turn the mic on: its output is always present on the T/B OUTPUT bus. The signal T/B OUTPUT bus is always available at the Continuous Talkback Output socket. Monitor Section 43 Metering 12 When the METER FOLLOW MONITOR switch is released the Meters will follow the Desk output, but will be interrupted by any PFL signal. When the switch is depressed the meters will follow the Control-room Monitor. A red LED in the switch glows to indicate that the Meters are following the Control-room Monitor. Note: The Meters will follow the Monitor even if talkback to the Control-room is used, i. e. [. . . ]