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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 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

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Содержание CAM8PRO

Страница 1: ...CAM8 Series Models CAM8 CAM8PRO Installation and Use Manual 2000 Bogen Communications Inc All rights reserved 54 2034 01C 0508 ...

Страница 2: ...ed 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...

Страница 3: ...RATION 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 ...

Страница 4: ...ed 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 CAM8 Series Page 4 of 32 ...

Страница 5: ...e 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 co...

Страница 6: ...ower and Set Up See pages 11 15 for 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...

Страница 7: ...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 Controls the output signal volume of the auxiliary bus output and to the headphones head phones 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...

Страница 8: ... level of either the main or aux iliary bus and to indicate either the average or peak signal See page 19 for details 7 Threshold Control Screw pot adjustment sets the signal level 40 to 20 VU factory setting is 0 VU at which the Compressor Limiter becomes active 8 Ratio Control Screw pot adjustment sets the amount of compression 0 100 factory setting is 100 of the signal above the threshold 9 Aux...

Страница 9: ...xiliary Input Balanced buffered uncontrolled line level terminals 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 50 dBµ or line 0 dBµ level for ...

Страница 10: ...er 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 use 2 conductor shielded 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 dama...

Страница 11: ...s Channel s 1 Main 2 and Auxiliary 3 to zero Turn amplifier s volume controls to the 7 o clock position B Connect Inputs Connect lead into desired pluggable terminal strip 6 on rear panel Press Input Pad Microphone Line Switch 5 to appropriate position in for line input or out for MIC input Note that the input from some mics is actually close to line level 20 dB and for such mics the switch should...

Страница 12: ...ower outlet and to the AC Power Jack 4 located on far left side of rear panel E Power up mixer Press Power Switch 8 to in position Power Indicator LED 7 will be lit if mixer is powered Set Main Output Volume Control Knob 5 to 2 o clock If auxiliary output is desired also set Auxiliary Output Volume Control Knob 6 to 2 o clock Power up amplifier Note Mixer will produce signal transients on power up...

Страница 13: ...ls the mixer s final amplifier stage to the master output This control should optimally operate between the 9 and 2 o clock positions when gain structure is correct With all channels operating the main output meter should show a signal output range between 0 and 6 VU Adjust the main output control accordingly If the output occasionally peaks in the range of 6 and 12 VU activate the Compressor Limi...

Страница 14: ... the 2 o clock position to provide adequate volume the input gain setting is too low Turn the volume control knob to the 1 o clock position and increase the input gain by turning the input gain trim control clockwise until clipping occurs or VU meter is over 0 VU Then adjust the gain to a setting just below the clipping level If channel volume is too high If a channel is not clipping but must be s...

Страница 15: ...d can solve certain ground loop problems It has 6 dB gain and good noise and ground loop rejection Unbalanced Source to Balanced Input Method 1 For an unbalanced source device the drawing below shows the best wiring method Because of the design of the mixer this wiring provides a slight 6 dB boost and moderate noise and ground loop rejection Unbalanced Source to Balanced Input Method 2 For an unba...

Страница 16: ...ystems 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 Switch 2 to the on position The phantom power switch will power condenser capacitor mics through the mic cable Depressing the button simultaneously applies phantom power to all channels set to mic l...

Страница 17: ...ignal level will acti vate the Compressor Limiter It has a range of 40 to 20 dB The Ratio Control 4 is a screw potentiometer that sets the compression ratio that will be applied when the signal exceeds the threshold It has a range from 0 to 100 A Compressor becomes a Limiter when the compression ratio is 10 1 or greater The factory setting for the threshold is 0VU 4 dB but this is variable from 40...

Страница 18: ...nts jumpers and potentiometers to which adjustments are needed for built in features are highlighted within dashed areas in the drawing below Warning Adjustments made to any other internal components may void the warranty Page 18 of 32 AUX IN MAIN OUT AUX OUT POWER METER RESPONSE PEAK AVG J20 J21 AUX PREGAIN POT RP23 LED BAR GRAPH METER REAR LEFT RIGHT FRONT METER SOURCE MAIN BUS AUX BUS J22 J23 A...

Страница 19: ...s the factory default Note The meter will operate only when a jumper is in one of these two positions Bus Routing Options AUX In Jumpers J17 and J18 These jumpers determine the destination of the Auxiliary Input The choices are J17 installed Auxiliary Input is routed to Main Output J18 installed Auxiliary Input is routed to Auxiliary Output J17 and J18 both installed Auxiliary Input is routed to b...

Страница 20: ...ou the equivalent of 48 inputs MIC inputs Each doubling of inputs reduces the system s noise floor by 6 dB An example of Simple Linking is shown on page 21 Complex Linking allows the use of multiple 8X2 channel mixers as a single 2 output mixer For example two mixers can be linked as a 16X2 channel mixer stack in which there are two separate output mixes with full control over distribution of the ...

Страница 21: ...place and J17 removed 4 Connect each mixer s AUX Out terminals with the AUX In terminals of the next mixer in the chain 5 Take the summed daisy chain output from the Main Out terminals of the last mixer in the daisy chain This must be the mixer with J17 in place from step 2 6 All mixers except the last mixer in the chain 1 in the drawing below must have all its front panel M A switches in the A po...

Страница 22: ...nputs from Mixer 1 with Main AUX set to AUX and inputs from Mixer 2 with Main AUX set to Main To create this complex mix take the following steps 1 Following the directions on page 19 set jumpers as shown in the drawing below J17 alone in both mixers 2 For both mixers remove jumper from position J2 and place it in position J1 This gives internal control of both auxiliary buses 3 Connect the two mi...

Страница 23: ...east a 21Volt Amp rating The details of the AC Power Jack on the rear panel are as shown in the following figure Technical Support 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 No connect Center AC AC ...

Страница 24: ... at the 7 o clock position Make sure that all unused input channels have the MIC Line switch in the Line position Make sure the MIC Line switch is in the correct position for both the inputs and the main output Hum MIC lines can easily cause hum Make sure to locate them away from vibration and magnetic field sources motors power supplies and lines and data lines Check MIC lines especially the shie...

Страница 25: ...ways exist between two or more devices and which can cause hum in the audio signal Jumper A short length of conductor used to connect pins electrically Limiter A device that severely at rates greater than 10 1 restricts the upper dynamic range of a signal by regulating the rate of increase of an input signal s amplitude so that it will not exceed a predetermined threshold Line Microphone Level The...

Страница 26: ...ource Impedance 150 ohm Line Pad 50 dB Input Gain Trim Range 40 dB Nominal Level input trim pot mid range 50 dBµ line pad off 0 dBµ line pad on Minimum Level input trim pot max gain 70 dBµ line pad off 20 dBµ line pad on Maximum Level input trim pot min gain plus 20 dB headroom 30 dBµ line pad off 20 dBµ line pad on AUXILIARY INPUT Input Impedance 20k ohm balanced Nominal Input Level 0 dBm OUTPUTS...

Страница 27: ...attack 650 ms decay Compressor Limiter Adjustment Range 20 dB to 40 dB Compressor Limiter Ratio Adjustment Range 0 to 100 Low Cut Filter 12 dB octave at 150 Hz Power Requirements 18V AC center tapped 21V AC 120V AC 60 Hz 18 24V DC 450 mA Dimensions 19 W x 1 3 4 H x 6 D Shipping Weights CAM8 10 lb CAM8PRO 10 lb Page 27 of 32 ...

Страница 28: ... 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 line 70 50 dB 10 10 dB PAD 10 10 dB 70 50 dB Mic line input 10 to 50 dB 10 to 50 dB Pre Post Limit in out 4 50 dB J18 Aux Line Input Link Input AREAS IN DASHED LINES DO NOT APPLY TO THE CAM8 Aux Bus Main volume 6 dB ...

Страница 29: ...OSE ARE HEREBY DISCLAIMED AND EXCLUDEDTOTHE MAXIMUM EXTENT ALLOWABLE BY LAW Bogen s liability arising out of the manufacture sale or supplying of products or their use or dispo sition whether based upon warranty contract tort or otherwise shall be limited to the price of the product In no event shall Bogen be liable for special incidental or consequential damages including but not limited to loss ...

Страница 30: ...Page 30 of 32 ...

Страница 31: ...Page 31 of 32 ...

Страница 32: ...50 Spring Street Ramsey NJ 07446 Tel 201 934 8500 Fax 201 934 9832 www bogen com ...

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