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CAM8-Series
Models CAM8, CAM8PRO
Installation and Use Manual
© 2000 Bogen Communications, Inc.
All rights reserved.
54-2034-01C 0508
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© 2000 Bogen Communications, Inc. All Rights Reserved. Notice Maintenance & Service Every effort was made to ensure that the information in this guide was complete and accurate at the time of printing. Caution However, this information is subject to change. There are no user-serviceable parts within the unit. Have all inter- nal servicing performed by a qualified technician.The warranty Important Safety Information will become void if repairs are made by other than the Bogen Always follow these
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Contents INTRODUCTION............................................................................................................................................................................................4 Safety Instructions ................................................................................................................................................................................5 QUICK START ...............................................................................
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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-use features. 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 4 of 32
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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. • Power Supply - Use only the power supply provided or one that meets the manufacturer’s specifications. • Cords and Cables - Route all cords a
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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 se
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Panel Descriptions 2 4 5 CAM8 + + + + + + + + - - - - - - - - M.A Low M.A Low M.A Low M.A Low M.A Low M.A Low M.A Low M.A Low Power BUS 1 Cut BUS 2 Cut BUS 3 Cut BUS 4 Cut BUS 5 Cut BUS 6 Cut BUS 7 Cut BUS 8 Cut MAIN AUX 1 3 6 7 CAM8 Front Panel 1. Main/Auxiliary Bus Selector (one per channel) A 4-position switch 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 auxilia
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2 5 7 8 9 CAM8PRO Threshold Ratio -40 +20 0 100 On + + + + + + + + - - - - - - - - Off -18 -12 -6 -3 0 +3 +6 +12 M.A Low M.A Low M.A Low M.A Low M.A Low M.A Low M.A Low M.A Low Limit Headphone Power BUS 1 Cut BUS 2 Cut BUS 3 Cut BUS 4 Cut BUS 5 Cut BUS 6 Cut BUS 7 Cut BUS 8 Cut MAIN AUX 1 3 4 6 10 11 12 CAM8PRO Front Panel 1. Main/Auxiliary Bus Selector (one per channel) + A 4-position switch which selects destination of channel input. Input can be routed to: a) the main bus (M-up,A-down); b) th
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1 4 6 7 8 18VCT AC Trim Trim Trim Trim Trim Trim Trim Trim Ground AUX OUT MAIN AUX IN 8 7 6 5 4 3 2 1 On Off G - - - - + + + + -50dB G - - - - + + + + G - - - - + + + + Line G - - - - + + + + Line G - - - - + + + + Line G - - - - + + + + Line G - - - - + + + + Line G - - - - + + + + Line G - - - - + + + + Line G- - - - + + + + Line G - - - - + + + + Power Phantom 0dB Mic Mic Mic Mic Mic Mic Mic Mic 3 5 9 10 2 CAM8/CAM8PRO Rear Panel 1. Ground Connection on Rear Panel Access to ground. 2.AC Pow
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Helpful Hints Electrical equipment operates best in a clean, dry, well-ventilated environment free of vibra- tion and electromagnetic fields. The following are some guidelines to achieve optimal per- formance. 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 electrom
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Installation Note: Take the mixer out of the box and inspect for shipping damage. If there is obvious physical damage to the outside of the mixer, contact the supplier of the mixer before you begin 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). A.Turn all mixer Volume Control Knobs [Channel(s) (1), Main (2), and Auxiliary (3)] to zero. 1
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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. 1 3 AUX OUT MAIN On Off G - - - - + + + + -50dB G - - - - + + + + Phantom 0dB 2 If desired, also connect Auxiliary Bus Output Terminals (1) to a second destination device. The auxiliary output is line-level only. D. Connect mixer power suppl
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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. 1 Trim 6 Line G - - - - + + + + Mic TheVolume Control (2) on the front panel controls how much of the gain is routed to the main output st
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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. Also make sure that the new setting of the gain control offers a usable control range between the 9 o’clock and 2 o’clock po
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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. It has +6 dB gain and excellent ground current and noise rejection. - - - + + + Gnd Balanced Source G Balanced Source to Balanced Input - Method 2
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Fine Tuning Low Cut Switch To remove excessive bass from an individual channel, press the Low Cut Switch (1) for that channel. + + - - M.A Low M.A BUS 1 Cut BUS 1 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. Phantom Power If a condenser microphone(s) is not independently powered, press Phantom Power Swi
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Compressor/Limiter (CAM8PRO only) 2 4 Threshold Ratio -40 +20 0 100 -18 -12 -6 -3 0 +3 +6 +12 Limit MAIN 1 3 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). Note: The Compressor/Limiter is only available on the CAM8PRO and only affects the main channel. A Compressor is used to slightly reduce the dy
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Special Features Activation 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. Note:All the internal components — jumpers and potentiometers — to which adjustments are needed for built-in features are highlighted within dashed areas in the drawing below. Warning
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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. Bar Graph Options The mixer’s meter can be configured to meter the output of either the main or auxiliary bus. In addition, the bar graph c
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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. Inputs can be multiplied in increments of 8 by adding mixers to the chain. The number of mixers that can be daisy-chained is limited o
