Soundcraft GP1 USER GUIDE

USER GUIDE

Parts of the design of this product may be protected by worldwide patents.

Part No ZM0055/01

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 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.

It is recommended that all maintenance and service on the product should be carried out by Soundcraft Electronics Ltd. or its authorised agents. Soundcraft Electronics Ltd cannot accept any liability whatsoever for any loss or damage caused by service, maintenance or repair by unauthorised personnel.

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

Tel: 0707 665000

Fax: 0707 660482

Table of Contents

Introduction 1

Introduction to the GP1 2

Precautions and Safety Instructions 3

PPS110 Circuit Diagram 6

Connections 7

Block Diagrams 9

Block Diagram - Inputs 10

Block Diagram - Outputs 11

Mono Input Module 13

Mono Input Module 14

Std Stereo Line Input 17

Standard Stereo Line Input Module 18

Basic Stereo Line Input 21

Basic Stereo Line Input Module 22

Master Section 25

Master Section 26

Monitor Module 29

Monitor Module 30

Appendices 33

Technical Specifications 34

Dimensions 35

Warranty 36

Introduction

Introduction 1

Introduction to the GP1

Overview

The GP1 Location Broadcast Mixer is available in three frame sizes: 6, 8 and 12 Input Modules. The GP1 also has an Output & Meter Master Module ,and a Monitor Module.

The Output meters are VU or PPM.

The GP1 is lightweight, for portability, whilst also being rugged.

The power consumption is low to ensure a long usable life for the internal batteries (typically 8-10 hrs from Ni-Cd cells, and 15-20 hrs from alkaline cells - both figures for the 12 Input version).

Although the GP1 is primarily designed for remote use with on-board battery power, the mixer may also be rack mounted (8 Input variant only), or furniture mounted. It may be mains powered via the PPS110 power supply.

2 Introduction

Precautions and Safety Instructions

General Precautions Avoid subjecting the mixer to conditions of excessive heat or cold, or installing it

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 legend strips. Other solvents may cause damage to paint or plastic parts.

Avoid using the mixer 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 mixer power supply away from the mixer.

Caution! In all cases, refer servicing to qualified personnel.

Power supply & cables Always use a power supply and power cables specified for the mixer: the use of

alternative supplies may cause damage and voids the warranty; the extension of power cables may result in malfunction of the mixer.

Warning! Before switching on the power supply, check that the mains voltage selectors

are correctly set to the voltage for your area, and that the fuses are of the correct type and rating. This is marked on the case of the power supply. Do not replace the fuses with any other type, as this could become a safety hazard and will void the warranty.

PPS110 Power Supply

Warning! Always switch the power supplies off before connecting or disconnecting the

mixers power cables, removing or installing modules, and servicing. In the event of an electrical storm, or large mains voltage fluctuations, immediately switch off the PSU and isolate from the mains. The power supply is connected to the mixer via the 4-way socket, marked DC Power, on the rear panel.

Always ensure that you use a suitable power supply for the mixer. The GP1 may use a PPS110 power supply (see details of the power connection below), or a suitable external source.

The mixer is powered from an external power supply when the POWER switch on the rear panel is set to EXT.

A PPS110 power supply is supplied with all variants of the GP1. The power supply is capable of operating over a wide range of mains input voltages by means of a comprehensive set of selectable voltage settings. It is important to ensure that the correct voltage setting has been selected for the level of local AC mains input voltage supply, for safe, uninterrupted-operation of the units.

Warning! DO NOT CHANGE THE AC MAINS VOLTAGE SETTING WITHOUT

FIRST DISCONNECTING THE MAINS PLUG FROM THE MAINS SOCKET.

The power supply is provided with an IEC-type mains connector, coupled with a voltage selector with integral AC mains fuse holder. Confirm that the arrow moulded into the connector unit aligns with the voltage setting that is correct for your area. Voltage selection should be as follows:

· 100Volt setting for AC Mains Input 100-115Volts AC

· 120Volt setting for AC Mains Input 115-125Volts AC

· 220Volt setting for AC Mains Input 210-225Volts AC

Introduction 3

· 240Volt setting for AC Mains Input 230-264Volts AC

To change the selected voltage, prise off the fuse holder square top with a screwdriver-type tool, using the square blade tip in the slot. Pull the fuse carrier assembly clear of the body, rotate the fuse carrier body until the required input voltage lines up with the arrow, and then push the fuse carrier back into the connector body.

Warning! DO NOT USE DC MAINS INPUT VOLTAGES

Replacing Mains Fuse Switch the units on/off mains switch to the off position, remove the mains lead plug

from the mains supply socket.

Check the fuse and replace if necessary: also check that the voltage selector is correct for the mains supply level before switching the unit on again. The correct fuse ratings are as follows:

220/240 VAC fuse rating T1.0A/250V

100/120 VAC fuse rating T2.0A/250V

Warning! TO AVOID THE RISK OF FIRE REPLACE ONLY WITH THE CORRECT

VALUE AND TYPE OF FUSE AS INDICATED ON THE UNIT.

In the event of repeated failure of the mains fuse, consult the dealer from whom the unit was purchased.

Technical Specification Mains Input Voltages (Nominal): 240/220/120/100 VAC @50/60Hz

PPS110 XLR pin out:

Pin 1 Chassis

Pin 2 0V

Pin 3 Battery charging voltage (28V DC (nominal))

(for charging the internal batteries)

Pin 4 28V DC ( nominal)

Overall Dimensions (Chassis)

Height: 77mm

Width: 140mm

Depth: 172mm

Power Supply Installation Free Standing

The PPS110 is designed to operate as a free-standing unit without requiring any special cooling arrangement, but should not be accidentally or deliberately covered in any way.

Rack Mounting

The PPS110 can be provided with an optional 19-inch rack-mounting kit: it occupies 2U of rack space.

Batteries The Location Mixer may also be powered by its own internal batteries: 12 or 16 D

type cells are required: the 6 and 8-input variants use 12 cells, the 12-input variant uses 16 cells. These may be primary cells or rechargeable cells; all cells must be of

4 Introduction

the same type, do not mix types. The access panel for inserting and removing the cells is on the underside of the mixer.

Warning! DO NOT try to recharge dry (primary cells: they may explode, and the wiring

will melt if this is attempted

Rechargeable cells may be recharged from the power supply. To do this set the CHARGE switch on the power supply to on.

It is not advisable to charge the cells and use the mixer at the same time: performance specifications may not be achieved under adverse conditions.

The mixer is powered from the internal cells when the POWER switch on the rear panel is set to INT.

Signal Levels It is important to supply the correct input levels to the mixer, 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 inputs, 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 inputs are designed for use with balanced, low impedance (150 or

200) microphones.

Caution! DO NOT use unbalanced microphones or battery powered condenser microphones

without isolating the phantom power - degraded performance or damage to the microphone may result.

Introduction 5

PPS110 Circuit Diagram

LD1

R3 2K4

CHARGE

SW1

SPST

CN2

F1A

2 P IN

AMBER

F3,16A

CHASSIS

CHARGE

2U2H

5 P IN

CHOKE

2K4

10000/40V

CN3

1N4001

LD2

GREEN

4 P IN XL R

CABLE CONNECT OR

RED

WHT

YEL

CHASSIS

CHARGE

GREEN

3 2

PPS-110

UNREGULATED POWER SUPPLY

ISSUE 2

ED3395

240V

10000/40V

2U2F/50V

3,15A

CN1

4 P IN

123

22R

100N

0.5W

100N

47R

RECT1

18V5 AC

TRANSFORMER

220V

120V

100V

DPST

SW2

MAINS VOLTAGE

50/60Hz

100V-240V

LNE

(I.E.C)

SELECTOR

120V

220V

100V

240V

FUSE

A.C.

The Mains input fuse is rated at:

T1.0A/250V Mains Input 220/240V AC

T2.0A/250V mains Input 100/120V AC

CHASSIS

6 Introduction

Connections

Wiring Conventions The GP1 uses two different types of audio connector: 3-pin XLR, and

jacks.

XLR Connectors

MALE XLR

Pin 1 = Ground (Screen) Pin 2 = Hot (In-Phase) Pin 3 = Cold ( Out-Of-Phase)

FEMALE XLR

Pin 1 = Ground (Screen) Pin 2 = Hot (In-Phase) Pin 3 = Cold ( Out-Of-Phase)

Jack Plugs

/4" 3-pole

Tip Ring Sleeve

The Connections are as follows:

Balanced Inputs

Tip Hot (In-Phase) Signal

Ring Cold (Out-Of-Phase) Signal

Sleeve Ground (Screen)

Headphones

Tip Left Signal

Ring Right Signal

Sleeve Ground (Screen)

Introduction 7

8 Introduction

Block Diagrams

Block Diagrams 9

Block Diagram - Inputs

CTL

PFL

POST

AUXES

BUSES

PRE

R L

AUX2

AUX1

POST

PRE

HPF

PAN

MUTE

FADER

AUX2

AUX1

POST

PRE

PFL

MUTE

BAL

FADER

HPF

GAIN

MONO_R

MONO_L

GAIN

DIN

PHASE

MIC

LINE

PAD

POWER

PHANTOM

MIC

LINE

PAD

LINE

MONO INP UT CH.

LINE

PAD

STEREO INPUT CH.

10 Block Diagrams

Block Diagram - Outputs

HPHONE 1

METER L

METER R

LEFT

RIGHT

AUX 1

AUX 2

H/P 2

H/P 3

T/B

PHONES 1

EXT

MON

LIMITER

EXT

TALK

AUX 1

AUX 2

EXT

L/R

TALK

BATT

CHECK

L/R

AUX 1

PFL

AUX 2

EXT

TALK TO

T/B MIC GA IN

MONO

MUTE

LINK

LIM

LEFT

RIGHT

LIM

AFL

MUTE

AFL

PAD

EXT L

PAD

T/B

EXT R

MASTER OUT PUT SECTION

MONITOR MODULE

TALK TO

L / R

AUX 2

AUX 1

FADER

TONE

FADER

LEVEL

AUX 1

POST

LEVEL

AUX 2

PRE

OSC

LEFT

PFL

RIGHT

PFL MIX

CTL

PFL

POST

AUXES

BUSES

PRE

Block Diagrams 11

12 Block Diagrams

Mono Input Module

Mono Input Module 13

Mono Input Module

Input

PHANTOM

POW

SENS

CIM

LINE

HPF

2 3

connector, or 12 Volt T-power where +12 V is applied to pin 2 of the XLR, and 0v is applied to pin 3. The functionality of the PHANTOM POWER switch is selected by internal jumper/switch settings.

A 12V Phantom Power option is also available. This is also set by links and an internal switch on the PCB. If this option is used then +12Vis applied to pins 2 & 3 of the XLR.

2 The Phase switch reverses the polarity (hot/cold) of whichever input is in use.

The switch’s released position is the normal setting.

1 The PHANTOM POWER switch applies +48V to pins 2 & 3 of the mic XLR

AUX1

AUX2

PAN

UTE

PFL

3 The SENSitivity control adjusts the gain of either input. The mic range is from

80dB to 15dB gain, the line range is 35dB to -10dB.

4 The LINE switch, when depressed, causes the mic input to be replaced by the

line input.

5 The HPF switch, when depressed, puts a High Pass filter into the signal path.

This removes unwanted low frequency signals. The filter’s -3dB point is at 80Hz, and the filter has a slope of 12dB/octave.

6 The EQ switch places the Equaliser section into the signal path.

The EQ section consists of three filters, controlled by the HF, MF and LF controls.

7 The shelving HF control provides a maximum cut/boost of 10dB at 10kHz. The

control is centre-detented at 0dB.

8 The MF control creates a bell envelope which has a maximum cut/boost of

14dB at 2kHz. The control is centre-detented at 0dB.

9 The LF control provides a maximum boost/cut of 10dB at 100Hz. The control

is centre-detented at 0dB.

Auxiliary Sends

10 The AUX1 Level control is used to control the signal level which is sent to the

40 50

Auxiliary 1 output mix. The signal can be varied between 0dB and infinite attenuation. Aux1 may be selected, via the Master Module, as pre-fade or post-fade.

11 The AUX2 Level control is used to control the signal level which is sent to the

Auxiliary 2 output mix. The signal can be varied between 0dB and infinite attenuation. Aux2 is always post-fade.

Pan

12 The mono input to the module may be positioned within the stereo image, which

is carried by the Left and Right mix buses, by means of the PANorama pot.

14 Mono Input Module

PFL

13 The PFL switch routes the pre-fade post -EQ signal onto the PFL mix bus. The

PFL control bus is also activated.

The associated PFL LED is illuminated when the PFL switch is active.

Peak

14 The PEAK LED starts to illuminate when there is 6dB of headroom left.

Output

15 The MUTE switch routes the output from the Fader onto the Left and Right

Main Mix buses, via the PAN pot; it also routes the other post-fade paths, i.e. Aux1 and Aux2.

The associated MUTE LED is illuminated when the Mute switch is active.

16 The 100mm Fader provides 10dB of gain at maximum.

Options An optional input transformer (common to mic. and line) can be fitted.

Jumpers The following table shows how to set the jumpers for phantom power and T-power

options:

Power Options

48V 12V 12V (48V on (12V on 12V pin 2 pins 2 & 3) pins 2 & 3) 0V pin 3)

Jumper J12-0V OUT OUT IN

+12V IN IN OUT

Internal Switch 48V/12V Released Depressed Depressed

Rear Connector Two female XLR connectors are provided at the rear of the Mono Input Module.

The top one is for the Mic, the lower one is for the Line input. The connections are as follows:

Pin 1 Ground (Screen) Pin 2 Hot (In Phase) Pin 3 Cold (Out of Phase)

Mono Input Module 15

16 Mono Input Module

Std Stereo Line Input

Std Stereo Line Input 17

Standard Stereo Line Input Module

Input

RHS

MONO

SOURCE

MUTE

GAIN

AUX1

LINE

DIN

AUX2

BAL

PFL

1 The LINE/DIN switch allows you to select a nominal level of +4dBu (when

the switch is released) or a nominal level of 10dBV (when the switch is depressed).

2 Pressing the RHS PHASE switch will reverse the phase of the Right-hand

signal.

3 The rotary GAIN control provides 0dB at the centre detent, and a cut/boost of

15dB at the extremes of its travel.

4 The L and R MONO SOURCE switches operate as follows:

L position R position Effect

Out Out Normal Stereo operation. Out In Right-hand signal fed to both sides. In Out Left-hand signal fed to both sides. In In A mono sum of Left and Right

signals is fed to both sides.

5 The centre-detented BALance control provides a +3db boost to one channel

and a 8dB cut to the other channel at each end of its travel.

6 The High-Pass Filter switch, when depressed, puts a High Pass filter into the

Signal path. This removes unwanted low frequency signals. The filters 3dB point is at 80Hz, and the filter has a slope of 12dB/octave.

The EQ has two shelving filters.

7 The two shelving filters are in-circuit when the EQ button is depressed.

8 The shelving HF control provides a maximum cut/boost of 10dB at 10kHz. The

control is centre-detented at 0dB.

9 The LF control provides a maximum boost/cut of 10dB at 100Hz. The control

40 50

is centre-detented at 0dB.

Auxiliary Sends

10 The AUX1 Level control is used to control the signal level which is sent to the

Auxiliary 1 output mix. The signal, which is a mono mix of L & R, can be varied between 0dB and infinite attenuation. Aux1 may be selected, via the Master Module, as pre-fade or post-fade.

11 The AUX2 Level control is used to control the signal level which is sent to the

Auxiliary 2 output mix. The signal, which is a mono mix of L & R, can be varied between 0dB and infinite attenuation. Aux2 is always post-fade.

Note: the mono mix is at a level equal to (L + R) -6dB.

18 Std Stereo Line Input

PFL

12 The PFL switch routes the pre-fade post-EQ signals, as a mono mix, onto the

PFL mix bus. The PFL control bus is also activated.

The associated PFL LED is illuminated when the PFL switch is active.

Peak

13 The PEAK LED starts to illuminate when there is 8dB of headroom left.

Output

14 The MUTE switch routes the outputs from the Fader onto the Left and Right

Main Mix buses; it also routes the other post-fade paths, i.e. Aux1 and Aux2.

The associated MUTE LED is illuminated when the Mute switch is active.

15 The 100mm Fader provides 10dB of gain at maximum, and infinite attenuation

when closed.

Options Optional input transformers can be fitted.

Rear Connector Two female XLR connectors are provided at the rear of the Stereo Line Input

Module. The connections are as follows:

Pin 1 Ground (Screen) Pin 2 Hot (In Phase) Pin 3 Cold (Out of Phase)

Std Stereo Line Input 19

20 Std Stereo Line Input

Basic Stereo Line Input

Basic Stereo Line Input 21

Basic Stereo Line Input Module

Input

NEI

GAIN

1 The LINE/DIN switch allows you to select a nominal level of +4dBu (when

the switch is released) or a nominal level of 10dBV (when the switch is depressed).

2 The rotary GAIN control provides 0dB at the centre detent, and a cut/boost of

15dB at the extremes of its travel.

3 The centre-detented BALance control provides a +3db boost to one channel

and a 8dB cut to the other channel at each end of its travel.

The EQ has two shelving filters.

4 The shelving HF control provides a maximum cut/boost of 10dB at 10kHz. The

control is centre-detented at 0dB.

AUX1

AUX2

BAL

MUTE

5 The LF control provides a maximum boost/cut of 10dB at 100Hz. The control

is centre-detented at 0dB.

Auxiliary Sends

6 The AUX1 Level control is used to control the signal level which is sent to the

Auxiliary 1 output mix. The signal, which is a mono mix of L & R, can be varied between 0dB and infinite attenuation. Aux1 may be selected, via the Master Module, as pre-fade or post-fade.

7 The AUX2 Level control is used to control the signal level which is sent to the

PFL

Auxiliary 2 output mix. The signal, which is a mono mix of L & R, can be varied between 0dB and infinite attenuation. Aux2 is always post-fade.

Note: the mono mix is at a level equal to (L + R) -6dB.

PFL

8 The PFL switch routes the pre-fade post-EQ signals, as a mono mix, onto the

PFL mix bus. The PFL control bus is also activated.

The associated PFL LED is illuminated when the PFL switch is active.

Peak

9 The PEAK LED starts to illuminate when there is 8dB of headroom left.

40 50

Output

10 The MUTE switch routes the outputs from the Fader onto the Left and Right

Main Mix buses; it also routes the other post-fade paths, i.e. Aux1 and Aux2.

The associated MUTE LED is illuminated when the Mute switch is active.

22 Basic Stereo Line Input

11 The 100mm Fader provides 10dB of gain at maximum, and infinite attenuation

when closed.

Options Optional input transformers can be fitted.

Rear Connector Two female XLR connectors are provided at the rear of the Stereo Line Input

Module. The connections are as follows:

Pin 1 Ground (Screen) Pin 2 Hot (In Phase) Pin 3 Cold (Out of Phase)

Basic Stereo Line Input 23

24 Basic Stereo Line Input

Master Section

Master Section 25

Master Section

BAT

LOW

POST

PRE

METER

ILLUM

BATT

CHECK

PFL

AUX 1

MASTER

AUX1

TONE

LIMITER

LIMIT

LINK

AUX2

10 10

50 60 70

H/P 1

LEVEL

HEADPHONE 1

L-R

EXT

MUTE

AFL

01010

MUTE

AFL

AUX

14 15

26 Master Section

Power

1 The ON/ BATT LOW LED will flash when the battery voltage is too low.

Typically 20-30 minutes of usable life remains at the onset of flashing.

2 The METER ILLUM switch allows the meters to be lit. Use of this facility

will, of course, increase the drain on the battery.

3 The BATT CHECK switch allows the battery voltage to be monitored on the

top (L) meter.

Metering

4 Two rear-mounted PPM or VU meters are fitted as standard.

The Headphones/ Inbuilt Monitor Speaker follow the Meters .

5 A PFL from any of the input modules, or AFL from the AUX Masters (see

below), will over-ride any meter display. The PFL LED illuminates to indicate a PFL. The Headphones/ Inbuilt Monitor Speaker will also be switched to follow any PFL signal.

Main Output

6 When the TONE switch is depressed the main mix L & R output signals are

replaced by a 1kHz tone. The Auxiliary Outputs are not affected.

7 The LIMITER switch places a level limiter in each of the Main Outputs (L &

R).

8 The LIMIT LEDS illuminate when their respective Outputs are being limited.

The Limiter threshold is settable by internal jumpers, the options are: +4, +6 or +8dBu (the default is +8dBu). The Attack and Release times are 2mSec and 300mSec. respectively.

9 The limiter pair may be linked together via the LINK switch. This is to provide

tracking during stereo operation.

10 The Left Fader controls the level of the Left Output

11 The Right Fader controls the level of the Right Output

Auxiliary Outputs

12 The AUX1 MASTER POST/PRE switch selects the Aux 1 feeds, from all of

the input modules, as post-fade or pre-fade.

13 The AUX 1 control adjusts the level of the Aux 1 Output mix.

14 The MUTE switch disconnects the Aux 1 feed from the Aux 1 output XLR.

15 The AFL switch routes the post-fade pre-mute Aux 1 signal onto the PFL mix

bus. The PFL control bus is also activated.

Master Section 27

16 The AUX 2 control adjusts the level of the Aux 2 Output mix.

17 The MUTE switch disconnects the Aux 2 feed from the Aux 2 output XLR.

18 The AFL switch routes the post-fade pre-mute Aux 2 signal onto the PFL mix

bus. The PFL control bus is also activated.

19 The H/P 1 LEVEL control adjusts the level of the Headphones 1/Inbuilt

Monitor Speaker signal.

Warning! Damage to your hearing may result from setting this control too high.

20 The L-R/EXT switch selects between the main mix or the external monitor

input as the headphone/meter source. In either case, a PFL/AFL will override the selection.

21 The HEADPHONE 1 socket. If a jack plug is inserted into this socket, the

internal speaker is disconnected.

22 The Internal Monitor Speaker.

Options The four major outputs (L, R, Aux1 and Aux2) are electronically balanced. Optional

1:1 output transformers can be fitted to provide electrical isolation. They are easily fitted to the internal motherboard.

Jumpers There are 6 jumpers: they are arranged in 2 groups of 3 jumpers. They set the Limiter

threshold to +4, +6 or +8dBu.

Looking from the component side of the PCB, the first group of jumpers is located approximately 3cm from the top edge and 6cm from the right-hand edge of the PCB.

The second group is approximately 6cm from the top and 10cm from the right-hand edge of the PCB.

Ensure that both groups of jumpers are set in accordance with each other.

Rear Connector Panel There are four 3-pin XLR male connectors on the Master Module rearcon panel.

These are OUTPUT L, OUTPUT R, AUX1 and AUX2.

28 Master Section

Monitor Module

Monitor Module 29

Monitor Module

Headphones 2

1 A bank of four interlocking switches selects the input source fed to the stereo

Headphone 2 .

EXT

AUX1

AUX2

L-R

TALK

MONO

EXT

AUX1

AUX2

L-R

EXT selects the External Monitor Input signal.

AUX1 selects the Aux 1 signal.

AUX2 selects the Aux 2 signal.

L-R selects the main mix.

H/P 2

2 The H/P 2 level control adjusts the level of the Headphones 2 signal.

Warning! Damage to your hearing may result from setting this control too high.

3 The TALK button, when depressed, routes the currently-selected source, as a

mono mix, to the left headphone, and the signal from the inbuilt microphone to the

right headphone.

4 The MONO EXT switch sums the External Monitor input to a mono signal.

Headphones 3

5 A bank of four interlocking switches selects the input source fed to the stereo

Headphone 3 .

H/P 3

EXT selects the External Monitor Input signal.

MIC

GAIN

TALK

EXT

AUX1

AUX2

L-R

TALK TO

AUX1 selects the Aux 1 signal.

AUX2 selects the Aux 2 signal.

L-R selects the main mix.

6 The H/P 3 level control adjusts the level of the Headphones 3 signal.

Warning! Damage to your hearing may result from setting this control too high.

7 The TALK button, when depressed, routes the currently-selected source, as a

mono mix, to the left headphone, and the signal from the inbuilt microphone to the right headphone.

Talkback

8 The level of the Talkback signal from the Inbuilt Mic is adjusted by the TB

MIC GAIN control.

9 The Inbuilt Microphone.

30 Monitor Module

10 A bank of four non-interlocking switches routes the signal from the inbuilt

microphone, as follows:

When the EXT switch is depressed, the signal from the inbuilt mic is routed to the talkback output on the COMMS socket on the rearcon.

When the AUX1 switch is depressed, the signal from the inbuilt mic is routed to the AUX1 mix bus, similarly for the AUX2 switch.

When the L-R switch is depressed, the signal from the inbuilt mic is routed to the main mix buses.

Rear Connector Panel There are two 3-pin XLR female connectors on the Master/Monitor Module rearcon

panel. They are EXT MON LEFT and EXT MON RIGHT.

There are two 1/4" jack socket for the headphones 2 & 3.

There is a 4-pin male connector (DC POWER) for connection to an external power supply. See page 4 for details.

There is also a 6-pin female connector (COMMS) to provide talkback facilities. The connections are as follows:

pin 1 Not Used pin 2 Chassis Gnd pin 3 System Gnd pin 4 Balanced Talkback Output pin 5 Balanced Talkback Output -+ pin 6 Not Used

The TALKBACK OUTPUT signal is normally a mono mix of whatever is selected for Headphones 3.

There is, finally, a screw-post connectors for CHASSIS GROUND.

Monitor Module 31

32 Monitor Module

Appendices

Appendices 33

Technical Specifications

System Gain

Mic 15dB to 80dB

Line -10dB to 20dB

Max System Gain is 90dB (Excludes EQ)

Noise (DIN RMS)

6 Input Desk Noise floor -90dB

No Routes Open -83dB

1Ch OPen 0dB -79dB ’Line Noise’ (from St i/p)

-80dB (from Mono i/p)

Frequency response

Mic -1dB 40Hz to 16kHz

Line -0.5 40Hz to 16kHz

Distortion

<0.03% @ +18dBu 40Hz to 16kHz

Max Levels Input Headroom Min 30dB @ 1kHz

Max Mic I/P +16dBu

Max Line I/P +40dBu

Max Output +24dBu into 600R

Mute/Fader Cut-off

Better than -85dB @ 1kHz

Better than -70dB @ 20kHz

All measurements assume:

1) Fresh or fully charged battery cells

2) Limiters out

3) Measurements taken with a calibrated Neutrik TP401

4) Electronically Balanced Input/Output

34 Appendices

Dimensions

5.57" [141 .5mm]

4.90" [124.5mm]

8 I/P L ENGTH = 17.11" [434.6mm]

6 I/P L ENGTH = 14.71" [373.6mm]

12 I/P L ENGTH = 21.91" [556.5mm]

13.27" [337.1 mm]

16.87" [428.5mm]

Weights (w ithout batteries and flight case):

6 input v ariant 8.8kg 8 input v ariant 1 0.0kg

12 input v ariant 1 2.4kg

Appendices 35

Warranty

1. Soundcraft means Soundcraft Electronics Ltd.

End User means the person who first puts the equipment into regular operation.

Dealer means the person other than Soundcraft (if any) from whom the End User purchased the Equipment provided such a person is authorised for this purpose by Soundcraft or its accredited Distributor.

Equipment means the equipment supplied with this manual.

2. If within the period of twelve months from the date of delivery of the Equipment to the End User it shall prove defective by reason only of faulty materials and/or workmanship to such an extent that the effectiveness and/or usability thereof is materially affected the Equipment or the defective component should be returned to the Dealer or to Soundcraft and subject to the following conditions the Dealer or Soundcraft will repair or replace the defective components. Any components replaced will become the property of Soundcraft.

3. Any Equipment or component returned will be at the risk of the End User whilst in transit (both to and from the Dealer or Soundcraft) and postage must be prepaid.

4. This warranty shall only be available if:

a) the equipment has been Properly installed in accordance with the instructions contained in Soundcraft’s manual; and

b) the End User has notified Soundcraft or the Dealer within 14 days of the defect appearing; and

c) no person other than authorise representatives of Soundcraft or the Dealer have effected any replacement of parts maintenance adjustments or repairs to the Equipment; and

d) the End User has used the Equipment only for such purposes as Soundcraft recommends, with only such operating supplies as meet Soundcraft’s specifications and otherwise in an respects in accordance Soundcraft’s recommendations.

5. Defects arising as a result of the following are not covered by this warranty: faulty or negligent handling, chemical or electromechanical or electrical influences accidental damage, Acts of God, neglect, deficiency in electrical power, air-conditioning or humidity control.

6. The benefit of this warranty may not be assigned by the End User.

7. End Users who are consumers should note their rights under this Warranty are in addition to and do not affect any other rights to which they may be entitled against the seller of the Equipment.

36 Appendices

Soundcraft GP1 USER GUIDE

Specifications and Main Features

Frequently Asked Questions

User Manual