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Summary of Contents for Bogen CAM8
- Page 1 CAM8-Series Models CAM8, CAM8PRO Installation and Use Manual © 2000 Bogen Communications, Inc. All rights reserved. 54-2034-01C 0508...
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Page 2: Important Safety Information
There are no user-serviceable parts within the unit. Have all inter- nal 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. -
Page 3: Table Of Contents
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... -
Page 4: Introduction
This manual is designed to familiarize you with the features of your new Bogen CAM8-Series mixer and to guide you through its installation and operation. -
Page 5: Safety Instructions
Safety Instructions Bogen’s CAM8-Series mixers 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. -
Page 6: Quick Start
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). -
Page 7: Panel Descriptions
Panel Descriptions CAM8 Front Panel 1. Main/Auxiliary Bus Selector (one per channel) 2. Channel Volume Control Knob (one per channel) 3. Low Cut Switch 4. Main Output Volume Control Knob 5. Auxiliary Output Volume Control Knob 6. Power Indicator LED 7. -
Page 8: Cam8Pro Front Panel
CAM8PRO Front Panel 1. Main/Auxiliary Bus Selector (one per channel) 2. Channel Volume Control Knob (one per channel) 3. Low Cut Switch 4. Main Output Compressor/Limiter Switch and LED 5. Main Output Volume Control Knob 6. LED Bar Graph Output Meter 7.Threshold Control 8. -
Page 9: Cam8/Cam8Pro Rear Panel
Ground -50dB - - - - + + + + Power Phantom CAM8/CAM8PRO Rear Panel 1. Ground Connection on Rear Panel 2. AC Power Jack 3. Phantom Power Switch 4. Auxiliary Bus Output 5. Main Output Microphone/Line Switch 6. Main Bus Output 7. -
Page 10: Helpful Hints
Protect the mixer from electrical damage by disconnecting it from the power source when- ever 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. -
Page 11: Installation
Rack Mounting:To mount 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). - Page 12 C. Connect Output: Make a connection between Main Bus Output Terminals (3) and an input jack of an amplifier. Press Main Output Microphone/Line Switch (2) to appropri- ate position: “in” for line-level output (0 dBµ) or “out” for mic-level (-50 dBµ) output. AUX OUT MAIN -50dB...
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Page 13: Operation
Operation The primary goal when establishing the gain settings of the mixers is to have each channel operating at the maximum gain without clipping, while leaving adequate headroom on the vol- ume control knob. The channel Input Gain/Trim Control (1) on the rear panel of the mixers directly controls the microphone pre-amplifier gain available at each channel. -
Page 14: Troubleshooting Gain Structure
Troubleshooting Gain Structure If the procedure followed to this point does not give satisfactory results, follow the appropriate adjustment sequence below: If channel clipping occurs If the signal is clipping or producing audible distortion, the gain is too high. Reduce the Input Gain/Trim Control (rear panel) by turning it counterclockwise until clipping does not occur. -
Page 15: Recommended Input Wiring Methods
Recommended Input Wiring Methods These are the best ways to connect sources to the mixer.The mixer input is always balanced. From the drawings below choose the wiring method for your input device (either balanced or unbalanced). Balanced Source to Balanced Input - Method 1 (Normal) Shown below is the normal wiring method for a balanced source device. -
Page 16: Fine Tuning
Fine Tuning Low Cut Switch To remove excessive bass from an individual channel, press the Low Cut Switch (1) for that channel. This feature helps eliminate low frequency noise (signals of 150 Hz and below, such as back- ground rumble from ventilation systems, etc.) and is used primarily with mic-level input. It is particularly effective when handheld mics are used. -
Page 17: Compressor/Limiter
Compressor/Limiter (CAM8PRO only) Threshold Ratio -6 -3 0 +3 Limit MAIN The Compressor/Limiter (1) is a dynamic range controller that can be used to compen- sate for signals that may sound unnatural or cause audible distortion.This is indicated by the LED Bar Graph Output Meter (3) occasionally exceeding +12 VU (red). -
Page 18: Special Features Activation
Special Features Activation LEFT The CAM8-Series mixers have several built-in features which are easily activated by making adjustments inside the mixer chassis. Changing the selection of all built-in features requires only the correct placement of internal jumpers or varying the settings of an internal poten- tiometer. -
Page 19: Jumper Options
Jumper Options Changing Jumper Settings To change a jumper setting, remove the ten screws secured to the top of the mixer. After removing the top of the mixer, locate the jumper to be changed by referring to the drawing on page 18. Jumpers are included from the factory in positions: J2, J17, J18, J21, and J22. Warning: Disconnect AC Power before opening case. -
Page 20: Linking
Linking CAM8-Series mixers can be linked in several ways.The two principal ways of linking the mix- ers are Simple and Complex Linking. Simple Linking is the expansion to more than 8 inputs by connecting two 8-channel mix- ers via the auxiliary bus. Simple Linking is the “daisy-chaining” of multiple mixers to expand the number of inputs routed to a single output. -
Page 21: Simple Linking
Simple Linking Simple linking or “daisy-chaining” allows the expansion of mixer inputs in multiples of 8 inputs by chaining together multiple mixers with auxiliary buses.To preserve certain mixer features, this must be done in the way shown below. Follow these steps (see page 18 for jumper loca- tions): 1. -
Page 22: Complex Linking
Complex Linking Mixer 1 Main Out Aux Out Destination 1 receives inputs from mixer 2 with the M-A switch set to auxiliary, and from mixer 1 with the M-A switch set to main. Complex Linking allows multiple mixers to produce two separate mixes from the same set of inputs.The most common complex linking application is shown below.This method can also be used to implement a “mix minus”... -
Page 23: Ac Power Connection
AC Power Jack on the rear panel are as shown in the following figure. Center No connect 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. Page 23 of 32... -
Page 24: Troubleshooting Tips
Troubleshooting Tips NO POWER Check the connections between the mixer and the power supply and the external AC power supply. Examine the 4-pin connector as shown on page 23. Check the wall outlet. NO SOUND • Make sure the MIC/Line switch is in the proper position. (This is the most likely cause.) •... -
Page 25: Glossary
Pot - Potentiometer. RCA Connector - An unbalanced line level connection, also known as “phono connector.” Summing Junction - The point in the CAM8-Series circuitry where the audio signals are mixed. Page 25 of 32... -
Page 26: Technical Information
Technical Information SPECIFICATIONS Signal-to-Noise MIC Pre-amp Equivalent Input Noise Maximum Voltage Gain Frequency Response Crosstalk (adjacent channels) Phantom Power INPUTS 1-8 Input Impedance Nominal Source Impedance Line Pad Input Gain/Trim Range Nominal Level (input trim pot mid-range) Minimum Level (input trim pot max gain) Maximum Level (input trim pot min gain plus +20 dB headroom) AUXILIARY INPUT... -
Page 27: Auxiliary Circuits
0 to 100% 12 dB/octave at 150 Hz 18V AC center-tapped, 21V AC/120V AC, 60 Hz ±18 - 24V DC, 450 mA 19" W x 1-3/4" H x 6" D (CAM8) 10 lb. (CAM8PRO) 10 lb. Page 27 of 32... -
Page 28: Block Diagram
Block Diagram Page 28 of 32... -
Page 29: Warranty
Warranty The CAM8 and CAM8PRO are warranted to be free from defects in material or workmanship for two (2) years from the date of sale to the original purchaser.Any part of the product covered by this warranty that, with normal installation and use, becomes defective will be repaired or replaced by Bogen, at our option, provided the product is shipped insured and prepaid to: Bogen Factory Service Department, 50 Spring Street, Ramsey, NJ 07446, USA.The product will be returned to you freight prepaid.This... - Page 30 Page 30 of 32...
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- Page 32 50 Spring Street, Ramsey, NJ 07446 Tel. 201-934-8500, Fax: 201-934-9832 www.bogen.com...
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