Soundcraft MBI SERIES 10 USER GUIDE

SERIES 10

USER GUIDE

© Soundcraft Electronics Ltd. 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. Soundcraft Electronics Ltd.
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 re co rd ing, fo r a ny purpose
without the express written permission of Soundcraft Electronics Ltd.

It is recommended that all maintenance and servic e on th e produ ct should be
carried out by Soundcraft Electronics Ltd. or its authorised agents. Soundcraft
Electronics Ltd. cannot accept any liability whatsoever for any loss or dama ge
caused by service, maintenance or repair by unauthorised personnel.

Soundcraft Electronics Ltd.
Cranborne House,
Cranborne Road,
Cranborne Industrial Estate,
Potters Bar,
Herts.,
England.
EN6 3JN.

Tel: [phone]
Fax: [phone]

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Introduction 1

Introduction 2
Precautions and Safety Instructions 4

Block Diagrams 7

Mono Input Module 8
Telco Input Module 8
Stereo Input Module 8
Master/Monitor Section 9

Applications 11

Connections and Connectors 12
Mono Input Channel 13
Telco Input Channel 15
Stereo Input Channel 17
Master Section 19
Monitor Section 20
Meterbridge 21

Mono Input Channel 23

Description and Operation 24
Specifications 26

Telco Channel 27

Description and Operation 28
Specifications 30

Stereo Input Channel 31

Description and Operation 32
Specifications 34

Master Section 35

Description and Operation 36
Specifications 38

Monitor Section 39

Description and Operation 40

Appendices 45

Glossary 46
Dimensions 47
Warranty 48

Introduction

Introduction

Precautions and Safety Instructions

Introduction to the MBI Series 10 1

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The Series 10 is a fully modular mixing console for local radio stations and smaller
self-operated studios of national broadcasters. The system has been designed to
accommodate the individual requirements of a station by providing flexibility and
a choice of configurations.

The Series 10 is available in a 24 module-width frame with a capacity of 20 input
channels (12 if fitted with a script space, the script space is 8 modules wide; or 14
if a 6-modules-width script blank is fitted) and a 32 module-width frame where
more input channels are required. Note that the script tray is a dished compartment
whereas the script blank is a flat plate on the same plane as the console panel.

Three types of input module are available:

Mono Input Module

Each module may be used for Mic/Line inputs. The module can be supplied with
or without a 3-band fixed frequency EQ section.

Telco (Telephone Communication) module

In addition to outputting signals to the programme, each module provides for on
and off-air telephone conversations with the Presenter, Guests or Producer. The
module can be supplied with or without a 3-band fixed frequency EQ section.

Stereo Module

Each module accepts one of two switch-se lectable stereo sources. One is the normal
source, such as a CD player or cart. machine, which is hard wired to the multipin
connector. The other may be an alternative or te mporary source which is connected
via XLR connectors. There are also connections for the remote operation of Start
& Stop relays for both of the sources. The module can be supplied with or without
a 3-band fixed frequency EQ section.

All inputs are fitted with peak signal detection to a lert the operator to any impending
headroom problems which could cause unwanted distortion.

Remote Controls

Remote controls are provided for cue lights and also ’on-air’ lights for local and
distant mics, and there are remote controls for cough muting and talkback routing.
Remotes are provided for telephone hybrid control and for on-board talkback to
cleanfeed. Off-air communication with the Caller can be set up from the Ope rato r
or the Producer. Stereo and mono modules (in line mode) have remote outputs fo r
machine start and stop/re-cue.

2 Introduction to the MBI Series 10

Master and Monitor Module

There are two variants of the Master and Monitor module: the Production variant
has the optional main Programme Faders and Effects Returns, the Broadcast version
has neither. The Master and Monitor module also contains the auxiliary master
level control; monitoring controls, for Presenter’s headphones and loudspeakers,
Studio headphones and loudspeakers; and communica tio ns inpu ts.

Module Options

Mono Input Module with EQ . . . S10ME
Mono Input Module without EQ . S10M
Stereo Input Module with EQ . . S10SE
Stereo Input Module without EQ . S10S

Telco Module with EQ . . . . . . S10TE

Telco Module without EQ . . . S10T
Production Master/Monitor . . . S10OP

(with faders and effects returns)
Broadcast Master/Monitor . . . S10OB

(without faders or effects returns)

The Meterhood

The meterhood conceals studio wiring and provides space for additional
monitoring, loudspeakers, clock.timer,talkback and meter units.

It is equipped, as standard, with LED Master Meters. The fo llowing are o ptionally
available:

Large VU Master Meters
Single Large VU Meter
Small VU Meters
Large PPM Master Meters
Single Large PPM Meter
Small PPM Meters
RTW Bargraph Meter
PFL/Talkback Loudspeaker Module
Talkback Remote Module
Timer Module
Input Selector

Power Supply

The Series 10 requires a CPS150 power supply. This is available with an optional
rack-mount front panel.

Introduction to the MBI Series 10 3

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General Precautions

Caution!

Handling and Transport

Power supplies & cables

Avoid storing or using the console in conditions of excessive heat or cold, or in
positions where it is likely to be subject to vibration, dust or moisture. Do not use
any liquids to clean the fascia of the unit: a soft dry brush is ideal. Use only water
or ethyl alcohol to clean the trim and scribble strips. Other solvents may cause
damage to paint or plastic parts.

Avoid using the console close to strong sources of electromagnetic radiation (e.g.
video monitors, high power electric cabling): this may cause degradation of the
audio quality due to induced voltages in connecting leads and chassis. For the same
reason, always site the console power supply away from the unit .

In all cases, refer servicing to qualified personnel.

The console is a very rugged unit, designed for long service. However, care in
handling and transportation will ensure a long and trouble-free life. If the console
is to be regularly moved we recommend that it is installed in a foam lined flight
case. At all times avoid applying excessive force to any knobs, switches or
connectors.

Always make sure that the power supplies have been set to the same source voltage
as the mains supply.

Warning!

Always use the power supplies and power cables supplied with the console: the use
of alternative supplies may cause damage and voids the warranty; the extension of
power cables may result in malfunction of the console.

Always switch the power supplies off before connecting or
disconnecting the console power cable, removing or installing
modules, and servicing. In the event of an electrical storm, or large
mains voltage fluctuations, immediately switch off the PSU and
unplug from the mains.

Always ensure that that you use the correct power supply for your console. Each
Series 10 console requires the CPS150 power supply.

4 Introduction to the MBI Series 10

Signal Levels

It is important to supply the correct input levels to the console, otherwise
signal-to-noise ratio or distortion performance may be degraded; and in extreme
cases damage to the internal circuitry may result. Likewise, on all balanced inp uts
avoid sources with large common mode DC, AC or RF voltages, as these will reduce
the available signal range on the inputs. Note that 0dBu = 0.775V RMS.

The microphone input is designed for use with balanced low impedance
(150 or 200Ω) microphones.

Caution!

DO NOT use unbalanced microphones or battery powered
condenser microphones without isolating the +48V phantom power

- degraded performance or damage to the microphone may result.

Introduction to the MBI Series 10 5

6 Introduction to the MBI Series 10

Block Diagrams

Mono Input Module

Telco Input Module

Stereo Input Module

Master/Monitor Module

Block Diagrams 7

Block Diagrams

Mono Input Module

Telco Input Module

Stereo Input Module

Master/Monitor Module

Block Diagrams 7

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MONO INPUT CHANNEL

PGM
MIX

LR

PFL L

PFL R

AUX

LOCAL MUTE

TB MIX

DIST MUTE

PFL D.C.

MIC

LINE

48V

LINE

LINE

INSERT

+/-15dB TRIM

80Hz

HPF

+/-15dB TRIM

80Hz

HPF

TB ENABLE

REM

COUGH

PFL

COMM

EXT TB

PRE or

PEAK

OPT.

EQ

POST

FADER

TB CONTROL

REMOTE
LOGIC

TELCO INPUT CHANNEL

PEAK

OPT.
EQ

PFL

REMOTE
LOGIC

PFL CONTROL

CUE LIGHT

PRE or
POST

FADER

PFL CONTROL

PAN

INPUT 2 START
INPUT 2 STOP

/RE-CUE

AUX

PAN

AUX

COUGH

MUTE

PGM
MIX

LR

PFL L

PFL R

AUX

TB MIX

TB OUTPUT

LOCAL MUTE

DIST MUTE

PFL D.C.

MONO OUTPUT

CLEAN FEED
OUTPUT

LINE 1

LINE 2

Duplicate stereo
circuits not shown
for clarity.

LINE

80Hz
HPF

BALANCE

START

PFL

CLEAN
FEED
CONTROL

EXT TB

STEREO INPUT CHANNEL

PEAK

OPT.

EQ

+/-15dB TRIM

REMOTE
LOGIC

PRE or
POST

FADER

PFL CONTROL

INPUT 1 START
INPUT 1 STOP

/RE-CUE

INPUT 2 START
INPUT 2 STOP

/RE-CUE

AUX

PGM
MIX

LR

PFL L

PFL R

AUX

TB MIX

LOCAL MUTE

DIST MUTE

PFL D.C.

8 Block Diagrams

PGM
MIX

LR

PFL L

PFL R

AUX MIX

TB MIX

LOCAL MUTE

DIST MUTE

TB OUTPUT

OPTIONAL
FX RETURN
X 2

PFL D.C.

MONO OUTPUT

PFL

FX LEVEL

PAN

MASTER/MONITOR SECTION

PEAK

AUX
MASTER

OPTIONAL
MONO FADER

DISTANT
MUTE
RELAY

LOCAL
MUTE
RELAY

AUX OUTPUT

MONO OUTPUT

LEFT OUTPUT

TO

SOURCE

SELECT

DESK
AUX

PFL

EXT
TB

DESK

AUX

PFL

EXT
TB

OPTIONAL
STEREO FADER

SOURCE

SELECT

SPLIT PFL

SOURCE

SELECT

TO SOURCE SELECT

STUDIO TB
AUTO PFL

LEVEL

CONTROL ROOM MONITOR
IS SIMILAR EXCEPT THAT IT
HAS AUTO PFL INSTEAD OF
SPLIT PFL.
IT ALSO HAS LOCAL MUTE.

TALKBACK LOGIC

TALKBACK

LEVEL

STUDIO HEADPHONES CIRCUIT
IS SIMILAR EXCEPT THAT IT
DOESN’T HAVE DISTANT MUTE.

RIGHT OUTPUT

STEREO OUT

PRES
HEADPHONES

TB I/P 1

TB I/P 2 NOT
SHOWN FOR CLARITY

STUDIO
MONITOR

CONTINUOUS
TB O/P

INBUILT MIC

EXT SELECTOR

ONLY THE RIGHT HAND SIDE OF STEREO SIGNALS
FOR MONITORS ARE SHOWN FOR CLARITY

1234

EXTERNAL INPUTS

Block Diagrams 9

10 Block Diagrams

Applications

Connections and Connectors

Mono Input Channel

Telco Input Channel

Stereo Input Channel

Master Section

Monitor Section

Meterbridge

Applications 11

Applications

Connections and Connectors

Mono Input Channel

Telco Input Channel

Stereo Input Channel

Master Section

Monitor Section

Meterbridge

Applications 11