Bogen CAM8 manuale d’uso

CAM8-Series Models CAM8, CAM8PRO Inst allation and Use Manual © 2000 Bogen Communications, Inc. All rights reserved. 54-2034-0 1 C 0508[...]

© 2000 Bogen Communications, Inc. All Rights Reser ved. Notice Every effort was made to ensure that the information in this guide was complete and accurate at the time of printing. How ev er , this information is subject to change. Important Safety Information Alwa ys f ollow these basic saf ety precautions when installing and using the unit: 1 . [...]

Contents INTRODUCTION ............................................................................................................................... ............................................................. 4 Safety Instructions ....................................................................................................................[...]

Intr oduction This manual cov ers installation for both the C AM8 and C AM8PR O . They w ere manufactured to ensure the highest quality audio signal pr oduction and control, while still incorporating sim- ple-to-use featur es. This manual is designed to familiarize y ou with the features of your ne w Bogen C AM8-Series mix er and to guide you throu[...]

Safety Instructions Bogen’ s C AM8-Series mix ers are electrical equipment, so tak e all the precautions usuall y tak en when installing and using electrical equipment (see inside front cov er). T o protect both the users and the equipment, pa y par ticular attention to: • Grounding - Mak e sure both the mix er and the devices connected to it a[...]

Quick Star t 1 . Unpack and Connect (See page 11 for mor e details). A. Check mixer f or shipping damage. Rack Mounting: T o mount the C AM8 and C AM8PR O to a 1 9” rack, lift the unit up to the front of the rack and secur e it to the front of the rack with the necessary scre ws (not included with this unit). B. If special featur es (see page 1 8[...]

P anel Descriptions CAM8 F r ont Panel 1 . Main/Auxiliar y 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 auxiliar y bus (M-down, A-up - shown at right); c) both the main and auxiliar y bus (both up); or d) neither bus (both down). 2. Cha[...]

CAM8PRO F r ont P anel 1 . Main/Auxiliar y 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 auxiliar y bus (M-down, A-up- shown at right); c) both the main and auxiliar y buses (both up); or d) neither bus (both down). 2. Channel V olume Con[...]

CAM8/CAM8PRO Rear P anel 1 . Ground Connection on Rear P anel Access to ground. 2. AC P ow er Jack Mix er power supply input. Accepts a 4-pin DIN connection from a 1 8V CT 1 .5 Amp trans- former (uses appr oximately 500 mA). 3. Phantom P ow er Switch When activated, supplies 30V DC power to all inputs set to mic le vel. 4. Auxiliar y Bus Output Bal[...]

Helpful Hints Electrical equipment operates best in a clean, dr y , well-ventilated en vironment fr ee of vibra- tion and electromagnetic f ields. The following are some guidelines to achie ve optimal per- formance. Av oid placing the mixer and cables near heat sour ces. Be par ticularly a ware of other audio equipment, such as amplifiers, which ca[...]

Installation Note: T ake the mix er out of the box and inspect for shipping damage. If ther e is obvious ph ysical damage to the outside of the mixer , contact the supplier of the mixer bef ore you begin installation . Rack Mounting: T o mount C AM8 and C AM8PR O to a 1 9” rack, lift the unit up to the front of the rack and secure it to the fr on[...]

C. Connect Output: Make a connection betw een Main Bus Output T erminals (3) and an input jack of an amplifier . Press Main Output Micr ophone/Line Switch (2) to appropri- ate position: “in” for line-level output (0 dBµ) or “out” for mic-level (-50 dBµ) output. If desired, also connect Auxiliary Bus Output T erminals ( 1 ) to a second des[...]

Operation The primar y goal when establishing the gain settings of the mix ers is to hav e each channel operating at the maximum gain without clipping, while leaving adequate headr oom on the vol- ume control knob . The channel Input Gain/T rim Control ( 1 ) on the r ear panel of the mixers dir ectly contr ols the microphone pr e-amplifier gain a v[...]

T r oubleshooting Gain Structur e If the procedur e follow ed to this point does not give satisfactor y results, follow the appr opriate 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/T rim Control (r ear panel) by turning it counterclockwi[...]

Recommended Input Wiring Methods These are the best wa ys to connect sources to the mix er . The mixer input is alwa ys balanced. From the dra wings below choose the wiring method for your input de vice (either balanced or unbalanced). Balanced Source to Balanced Input - Method 1 (Normal ) Shown below is the normal wiring method f or a balanced sou[...]

Fine T uning Lo w Cut Switch T o remov e excessive bass from an individual channel, press the Lo w Cut Switch ( 1 ) for that channel. This featur e helps eliminate low frequency noise (signals of 1 50 Hz and below , such as back- ground rumble fr om ventilation systems, etc .) and is used primarily with mic-lev el input. It is particularly effectiv[...]

Compr essor/Limiter (CAM8PRO onl y) The Compressor/Limiter ( 1 ) is a dynamic range contr oller that can be used to compen- sate for signals that ma y sound unnatural or cause audible distortion. This is indicated by the LED Bar Graph Output Meter (3) occasionally exceeding + 1 2 VU (red). Note: The Compressor/Limiter is onl y available on the CAM8[...]

Special F eatures Activation The CAM8-Series mixers ha ve sev eral built-in features which ar e easily activated by making adjustments inside the mix er chassis. Changing the selection of all built-in featur es requir es only the corr ect placement of internal jumpers or var ying the settings of an internal poten- tiometer . Note : All the internal[...]

J umper Options Changing Jumper Settings T o change a jumper setting, r emov e the ten screws secur ed to the top of the mixer . After remo ving the top of the mixer , locate the jumper to be changed by r eferring to the dra wing on page 1 8. Jumpers ar e included from the factor y in positions: J2, J 1 7, J 1 8, J2 1 , and J22. W arning: Disconnec[...]

Linking CAM8-Series mixers can be link ed in several wa ys. The two principal wa ys of linking the mix- ers are Simple and Complex Linking. Simple Linking is the expansion to more than 8 inputs b y connecting two 8-channel mix- ers via the auxiliar y bus. Simple Linking is the “daisy-chaining” of multiple mix ers to expand the number of inputs [...]

Simple Linking Simple linking or “daisy-chaining” allows the expansion of mix er inputs in multiples of 8 inputs by chaining together multiple mix ers with auxiliar y buses. T o preserve certain mixer featur es, this must be done in the wa y shown below . Follo w these steps (see page 1 8 for jumper loca- tions): 1 . For each mix er , remov e t[...]

Complex Linking Complex Linking allows multiple mix ers to produce tw o separate mixes fr om 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” application. This method (CAM8PR O only) creates tw o separate mixes. Both destinations are r outed through the Co[...]

A C P o wer Connection This mix er is powered b y an 1 8 V olt, 1 .5 Amp center -tapped transformer (supplied). If anoth- er A C supply is used, it should be of equal voltage and ha ve at least a 2 1 V olt-Amp rating. The details of the A C P ow er Jack on the rear panel are as sho wn in the following figur e. T echnical Suppor t Our Applications E[...]

T r oubleshooting Tips NO PO WER Check the connections between the mix er and the power suppl y and the external A C power supply . Examine the 4-pin connector as shown on page 23. Check the wall outlet. NO SOUND • Mak e sure the MIC/Line switch is in the pr oper position. (This is the most likel y cause.) • Mak e sure both the master and chann[...]

Glossar y Auxiliar y Input - Accepts only a balanced, line-lev el input (unlik e the 8 channels); the auxil- iar y input has no volume contr ol. Compression Ratio - The ratio of the output level abo ve the thr eshold level to the input lev el above the thr eshold. Compression Thr eshold - The volume lev el, in dB, which is set as the optimum device[...]

T echnical Information SPECIFICA TIONS Signal-to-Noise Ref +26 dBV @ 54 dB sys gain = 90 dB MIC Pre-amp Equivalent Input Noise - 1 29 dB @ 1 50 ohm, 20 Hz to 20 kHz Maximum V oltage Gain 96 dB Frequency Response ± 1 dB fr om 20 Hz to 20 kHz +0, -3 dB from 1 0 Hz to 30 kHz Crosstalk (adjacent channels) better than -90 dB Phantom Po wer +30V DC INPU[...]

Auxiliar y Circuits Bar Graph - 1 8, - 1 2, -6, -3, 0, +3, +6, + 1 2 VU (0 VU = +4 dB) Av erage or Peak r eading Peak r eading per DIN spec . 45406 ( 1 .7 ms attack, 650 ms deca y) Compressor/Limiter Adjustment Range +20 dB to -40 dB Compressor/Limiter Ratio Adjustment Range 0 to 1 00% Lo w Cut Filter 1 2 dB/octa ve at 1 50 Hz P o wer Requirements [...]

Block Diagram Page 28 of 32 20 dB 20 dB Headphone Aux output +4 dB Peak Ave Bar Graph Main Line/mic output J21 J20 J23 J22 Main Meter Aux PAD 20 dB Line/mic M A Pre-gain RP 23 J1 J2 Sum volume Aux 20 dB Hi Pass 150Hz In/out INPUT 1 Ratio Threshold A M Control Sum Main J17 Limiter 20 dB 150Hz Hi Pass In/out INPUT 2 PAD Mic/line input Mic/line Mic/li[...]

Page 29 of 32 W arranty The CAM8 and C AM8PR O are warranted to be fr ee from defects in material or w orkmanship for two (2) y ears fr om the date of sale to the original purchaser . Any part of the product co vered b y this warranty that, with normal installation and use , becomes defectiv e will be repaired or r eplaced by Bogen, at our option, [...]

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