Carvin CX1252 Instruction Manual - Page 9

Date Revised BLOCK DIAGRAM CX 1252 & CX842 1155 Industrial Ave. Escondido, CA 92029 619-747-1710 FAX 747-9065 CHANNEL FEATURES Part No EFFECTS SEND 2 LEFT LINE OUT RIGHT LINE OUT TO INTERNAL POWER AMP INTERNAL DSP SEND GAIN REDUCTION FOR DSP EFFECTS SEND 2 GAIN STAGE NINE BAND GRAPHIC EQUILIZER NINE BAND GRAPHIC EQUILIZER 1. LINE INPUT JACK The LINE input is a 1/4" phone jack designed for unbalanced line and instrument level inputs. Examples of these inputs would be instruments such as a guitar, a keyboard, an unbalanced mic, or a pre-amp at the same time the mic input is being used. output. The line input canL be MON4 5 uRsed 6 2. XLR MICROPHONE INPUT 3 7 5 2 8 The XLR MIC input is designed for balanced low imped- 1 9 0 10 ance ( microphone ) input signals. The balance means the input differential amplifier will reduce the common noise picked up on the microphone cables. The XLR 4 connector is wired as per the industry standard, pin 1 is ground, pin 2 is non-inverting (positive), and pin 3 is inverting (negative). 3 456 3 7 2 8 1 9 0 10 LEVEL -20 dB 1 Phantom power is available on every XLR input jack when the phantom power switch in the master section is pressed. This feature allows condenser microphones to be run directly from the mixer. Note: When using phantom power make sure the phan- 2 tom power is switched off before connecting or discon- necting microphones to the mixer. It is recommended to MIC allow 5 seconds for the phantom power to discharge before making any microphone connections. Also, to 1 avoid hearing a pop, turn down the master volume when turning on the phantom power. LINE EFFECTS SEND 2 LEVEL MONITOR LINE OUT RIGHT TAPE OUT RIGHT AMP PATCH LEFT TAPE OUT LEFT AMP PATCH EFFECTS SUMMING AMP MONITOR SUMMING AMP MAIN LEFT SUMMING AMP AND LEVEL MAIN RIGHT SUMMING AMP AND LEVEL L R MON EFF DSP RETURN LEFT DSP TO MONITOR DSP RETURN RIGHT EFFECTS RETURN LEFT EFFECTS RETURN RIGHT PAN CHANNEL LEVEL CHANNEL EFF SND CHANNEL MONITOR LEVEL 3. -20DB PAD SWITCH This switch reduces the input gain on both the line and mic input jacks by 20dB. If distortion is heard regardless of the channel LEVEL control's setting engage this switch. This will eliminate the over-driving of the input amplifier before the channel LEVEL control. TAPE RTN LEFT EFF INPUT LEFT TAPE RTN RIGHT EFF INPUT RIGHT CHANNEL STEREO RETURN FOR INTERNAL STEREO DSP THREE BAND CHANNEL TONE CONTROLS HI MID LOW 4. CHANNEL LEVEL CONTROL The LEVEL control adjusts the final volume of the channel before going to the Pan control. Here is where the individual channel volumes are adjusted to make up the desired mix heard at the main outputs. A general rule to prevent distortion with in the mixer, is to always keep the MAIN master level the same or higher than the channel LEVEL. -20dB PAD SWITCH MIC PRE PAD line pad (-26dB) 5. MONITOR LEVEL CONTROL The MONITOR level control adjusts the volume of the channel going to the monitor mix. Here is where the individual channel monitor volumes are adjusted to make up the desired mix heard at the monitor output. The monitor level control is pre channel level and pre channel tone controls. This means it is unaffected by adjustments in channel level and tone controls. The purpose for this is so the main mix adjustments for tone and level can be made without disturbing the monitor mix. 3 16