Bogen CAM8 User Manual

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CAM8-Series

Models CAM8, CAM8PRO

Installation and Use Manual

© 2000 Bogen Communications, Inc. All rights reserved.

54-2034-01C0508

© 2000 Bogen Communications, Inc.

All Rights Reserved.

Notice

Every effort was made to ensure that the information in this guide was complete and accurate at the time of printing. However, this information is subject to change.

Important Safety Information

Always follow these basic safety precautions when installing and using the unit:

1. Read all instructions before installing or operating the unit.

2.Follow all warnings and instructions marked on the product.

3.DO NOT block or cover the ventilation slots and openings.They prevent the product from overheating. DO NOT place the product in a separate enclosure or cabinet, unless proper ventilation is provided.

4.Never spill liquid on the product or drop objects into the ventilation slots and openings. Doing so may result in serious damage to the components.

5.Repair or service must be performed by a factory authorized repair facility.

6.The product is provided with a UL-CSAapproved,3-wireground type plug.This is a safety feature. DO NOT defeat the safety purpose of the grounding type plug. DO NOT staple or otherwise attach the AC power supply cord to building surfaces.

7.DO NOT use the product near water or in a wet or damp place (such as a wet basement).

8.DO NOT use extension cords.The product must be installed within 6 feet of a grounded outlet receptacle.

9.DO NOT install telephone wiring during a lightning storm.

10. DO NOT install telephone jacks in a wet location unless the jack is specifically designed for wet locations.

11. Never touch uninsulated wires or terminals, unless the line has been disconnected at the paging or controller interface.

12. Use caution when installing or modifying paging or control lines.

Maintenance & Service

Caution

There are no user-serviceableparts within the unit. Have all internal servicing performed by a qualified technician. The warranty will become void if repairs are made by other than the Bogen Service Department or an authorized service agency.

Our Applications Engineering Department is available to help you troubleshoot problems with your Bogen equipment. Engineers are available from 8:30 AM to 6:00 PM, Eastern Standard Time. Phone 1-800-999-2809.

Service can be obtained from our factory service department. No merchandise may be returned for repair without prior written authorization. Please contact our factory service department at 1-800-999-2809for a RA number. Only merchandise specified in the return authorization form can be returned to obtain warranty ornon-warrantyrepair. When shipping your unit, pack your system well using the original shipping carton or a similar container and filler material to prevent damage in transit. Send the unit fully insured and prepaid via UPS or other responsible carrier.

Domestic and International Listings

UL and CSA Listed.

Page 2 of 32

Contents

 

INTRODUCTION............................................................................................................................................................................................

4

Safety Instructions ................................................................................................................................................................................

5

QUICK START ..................................................................................................................................................................................................

6

PANEL DESCRIPTIONS ..........................................................................................................................................................................

7-9

CAM8 Front Panel................................................................................................................................................................................

7

CAM8PRO Front Panel ......................................................................................................................................................................

8

CAM8/CAM8PRO Rear Panel ..........................................................................................................................................................

9

Helpful Hints........................................................................................................................................................................................

10

INSTALLATION ......................................................................................................................................................................................

11-12

OPERATION ............................................................................................................................................................................................

13-20

Troubleshooting Gain Structure ....................................................................................................................................................

14

Recommended Input Wiring Methods ..........................................................................................................................................

15

Fine Tuning............................................................................................................................................................................................

16

Compressor/Limiter ..........................................................................................................................................................................

17

Special Features Activation ..............................................................................................................................................................

18

Jumper Options ..................................................................................................................................................................................

19

LINKING ....................................................................................................................................................................................................

20-22

Simple Linking......................................................................................................................................................................................

21

Complex Linking ................................................................................................................................................................................

22

AC Power Connection......................................................................................................................................................................

23

Technical Support ..............................................................................................................................................................................

23

TROUBLESHOOTING TIPS ..................................................................................................................................................................

24

GLOSSARY ......................................................................................................................................................................................................

25

TECHNICAL INFORMATION ........................................................................................................................................................

26-28

Auxiliary Circuits ................................................................................................................................................................................

27

Block Diagram ....................................................................................................................................................................................

28

WARRANTY....................................................................................................................................................................................................

29

Page 3 of 32

Introduction

CAM8-Series

This manual covers installation for both the CAM8 and CAM8PRO.They were manufactured to ensure the highest quality audio signal production and control, while still incorporating sim- ple-to-usefeatures.

This manual is designed to familiarize you with the features of your new Bogen CAM8-Seriesmixer and to guide you through its installation and operation.

Page 4 of 32

Safety Instructions

Bogen’s CAM8-Seriesmixers are electrical equipment, so take all the precautions usually taken when installing and using electrical equipment (see inside front cover).To protect both the users and the equipment, pay particular attention to:

Grounding - Make sure both the mixer and the devices connected to it are properly grounded.

Power Supply - Use only the power supply provided or one that meets the manufacturer’s specifications.

Cords and Cables - Route all cords and cables so that they will not be tripping hazards or subject to damage (from being run over or pinched) that could cause them to become shock hazards. Pay particular attention to cords at plugs, convenience receptacles, and the point where they enter the mixer.

Page 5 of 32

Quick Start

1.

Unpack and Connect (See page 11 for more details).

 

A. Check mixer for shipping damage.

Rack Mounting: To mount the CAM8 and CAM8PRO to a 19” rack, lift the unit up to the front of the rack and secure it to the front of the rack with the necessary screws (not included with this unit).

B.If special features (see page 18) are to be used, they must be programmed before mixer is mounted.

C.Turn off both mixer and amplifier and turn all volume controls to zero.

D.Connect inputs and set the input pad switch for each channel at the appropriate level (either MIC or line). Make sure that the bus selector is set for Main Out.

E.Connect output(s) and set the main output pad switch at the appropriate level (either MIC or line). (Auxiliary output is line-levelonly.)

2.Power and Set Up (See pages11-15for details.)

A.Connect mixer AC power supply.

B.Turn volume controls down, then power up mixer and amplifier.

Note: Mixer will produce signal transients on power up and power down. Always turn the mixer on first before turning on the amplifier and always turn the amplifier off first before turning off the mixer.

C.Adjust Main/AUX out controls to the 2 o’clock position. Then turn amp up to normal level while performing audio test.

D.Adjust input gain/trim control for each channel to get a meter reading within the green area.

E.Adjust individual channel volume controls to the 2 o’clock position.

3.Fine Tuning (See page 16 for details).

A.In the event of excessive bass, press Low Cut filter switch(es) “on.”

B.If condenser mics are used, press phantom power switch “on” (turns phantom power on for all inputs set to MIC position).

C.(CAM8PRO only) In the event of occasional excessive output level, press Compressor/Limiter switch “on”.

Page 6 of 32

Panel Descriptions

2

4

5

+

 

 

+

 

 

+

 

 

+

 

 

+

 

 

+

 

 

+

 

 

+

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-

 

 

M.A

1

Low

M.A

2

Low

M.A

3

Low

M.A

4

Low

M.A

5

Low

M.A

6

Low

M.A

7

Low

M.A

8

Low

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

CAM8

MAIN

AUX

Power

1

3

6

7

CAM8 Front Panel

1. Main/Auxiliary Bus Selector (one per channel)

 

A 4-positionswitch which selects destination of channel input. Input can be

+

routed to: a) the main bus (M-up,A-down);b) the auxiliary bus(M-down,A-up

-

- shown at right); c) both the main and auxiliary bus (both up); or d) neither

bus (both down).

 

2. Channel Volume Control Knob (one per channel)

 

Controls the volume of the channel input to any and all outputs simultaneously.

3. Low Cut Switch

Helps eliminate low frequency noise (150 Hz 12dB/octave).

4. Main Output Volume Control Knob

Controls the output signal volume of the main bus.

5.Auxiliary Output Volume Control Knob

M A

Bus

Controls the output signal volume of the auxiliary bus output and to the headphones (headphones on CAM8PRO only).

6. Power Indicator LED

LED displays mixer’s powered state. Lit when power is on. Not lit when power is off.

7. Power Switch Button

Push button to turn unit on (“in” position); push again to turn unit off (“out” position).

Page 7 of 32

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

7

 

8

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Threshold

 

Ratio

CAM8PRO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

 

 

+

 

 

+

 

 

+

 

 

+

 

 

+

 

 

+

 

 

+

 

 

On

 

-40

+20

0

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-

 

 

-

 

 

Off

Limit

-18-12

-6-3

0

+3 +6

+12

 

M.A

1

Low

M.A

2

Low

M.A

3

Low

M.A

4

Low

M.A

5

Low

M.A

6

Low

M.A

7

Low

M.A

8

Low

 

MAIN

 

 

 

AUX Headphone Power

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

BUS

Cut

 

 

 

 

 

1

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

6

 

 

10

11 12

CAM8PRO Front Panel

1. Main/Auxiliary Bus Selector (one per channel)

A 4-positionswitch which selects destination of channel input. Input can be routed to: a) the main bus(M-up,A-down);b) the auxiliary bus(M-down,A-up-shown at right); c) both the main and auxiliary buses (both up); or d) neither bus (both down).

+

-

M A

Bus

2. Channel Volume Control Knob (one per channel)

Controls the volume of the channel input to any and all outputs simultaneously.

3. Low Cut Switch

Helps eliminate low frequency noise (150 Hz 12 dB/octave).

4. Main Output Compressor/Limiter Switch and LED

Note: Works only on main bus. Reduces distortion of the main output (due to clipping) by controlling its dynamic range. When the LED (red) is lit, the Compressor/Limiter is on. The brighter the LED, the more the signal is being compressed.

5. Main Output Volume Control Knob

Controls the output signal volume of the main bus.

6. LED Bar Graph Output Meter

Displays output signal level in decibels, ranging from -18(green) to +12 (red) VU. 0 VU = +4 dBm.This meter can be set to indicate the signal level of either the main or auxiliary bus and to indicate either the average or peak signal. See page 19 for details.

7.Threshold Control

Screw-potadjustment sets the signal level(-40to +20 VU; factory setting is 0 VU) at which the Compressor/Limiter becomes active.

8. Ratio Control

Screw-potadjustment sets the amount of compression(0-100%;factory setting is 100%) of the signal above the threshold.

9.Auxiliary Output Volume Control Knob

Controls the output signal volume of the auxiliary bus output and to the headphones (headphones on CAM8PRO only). (There is no connection between this bus and the Compressor/Limiter.)

10. Headphone Jack

A 1/4 inch-diameterTRSmono-onlyjack for the connection of headphones. (Only monitors AUX bus.)

11. Power Indicator LED

LED displays mixer’s powered state. Lit when power is on. Not lit when power is off.

12. Power Switch Button

Push button to turn unit on (“in” position); push again to turn unit off (“out” position). Page 8 of 32

1

4

6

7

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

18VCT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC

AUX OUT

MAIN

AUX IN

Trim

8

Trim

7

Trim

6

Trim

5

Trim

4

Trim

3

Trim

2

Trim

1

Ground

 

 

 

 

 

 

 

 

 

On

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Off

 

G - + Line

 

Line G - +

Line

 

Line G - +

Line G - +

Line G - +

Line G - +

Line G - +

Power

G - +

-50dBG- +

G - +

G - +

Phantom

0dB

 

Mic

 

Mic

 

Mic

 

Mic

 

Mic

 

Mic

 

Mic

 

Mic

 

2

3

5

 

 

 

 

 

9

10

 

 

 

 

 

 

 

 

 

 

CAM8/CAM8PRO Rear Panel

1. Ground Connection on Rear Panel

Access to ground.

2.AC Power Jack

Mixer power supply input. Accepts a 4-pinDIN connection from a 18V CT 1.5 Amp transformer (uses approximately 500 mA).

3. Phantom Power Switch

When activated, supplies 30V DC power to all inputs set to mic level.

4.Auxiliary Bus Output

Balanced, line-level,connection to auxiliary output bus.

5. Main Output Microphone/Line Switch

Selects main output to be either MIC (-50dBµ) or line (0 dBµ) level.

6. Main Bus Output

Balanced connection to main output bus.

7.Auxiliary Input

Balanced, buffered, uncontrolled, line-levelterminals for additional (ninth) input connection directly to the summing buses selected by internal jumpers. The factory default is both jumpers installed. For details, see page 19.

8. Input Gain/Trim Control Screw

Adjusts gain of input stage, over a range of 40 dB.

9. Input Pad Microphone/Line Switch

Selects either MIC (-50dBµ) or line (0 dBµ) level for corresponding input connection.

10. Input

Balanced input connection (pluggable terminal strip).

Page 9 of 32

Helpful Hints

Electrical equipment operates best in a clean, dry, well-ventilatedenvironment free of vibration and electromagnetic fields. The following are some guidelines to achieve optimal performance.

Avoid placing the mixer and cables near heat sources. Be particularly aware of other audio equipment, such as amplifiers, which can produce a great deal of heat when operating.

To minimize hum in the system, avoid placing the mixer and cables near radio frequency devices and other electromagnetic field sources such as:

Fluorescent lights

Electrical motors

SCR dimmers

AC power lines, etc.

Note: Always use2-conductorshielded cable to reduce EMI or RF interference to the

Line/MIC inputs.

Keep the mixer and other equipment clean and free of dust by wiping occasionally with a soft, damp cloth.

Protect the mixer from electrical damage by disconnecting it from the power source whenever it will be unused for a week or longer.

The Bogen mixer is easy to install and adjust. The only tools needed are:

1. Slotted screwdriver

2. Phillips-headscrewdriver

Page 10 of 32