User manual APOGEE MINI-MP

[. . . ] Units returned for warranty repair to Apogee or an authorized Apogee warranty repair facility will be repaired or replaced at the manufacturer's option, free of charge. ALL UNITS RETURNED TO APOGEE OR AN AUTHORIZED APOGEE REPAIR FACILITY MUST BE PREPAID, INSURED AND PROPERLY PACKAGED, PREFERABLY IN THEIR ORIGINAL BOX. Apogee reserves the right to change or improve design at any time without prior notification. Design changes are not implemented retroactively, and the incorporation of design changes into future units does not imply the availability of an upgrade to existing units. [. . . ] Consult the dealer or an experienced radio/TV technician for help. NOTE: The use of non-shielded cable with this equipment is prohibited. CAUTION: Changes or modifications not expressly approved by the manufacturer responsible for compliance could void the user's authority to operate the equipment. Apogee Electronics Corporation, 3145 Donald Douglas Loop South, Santa Monica, CA 90405. Industry Canada Notice This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matérial brouilleur du Canada. Declaration of Conformity ­ CE Apogee Electronics Corporation hereby declares that the product, the Mini-MP to which this declaration relates, is in material conformity with the following standards or other normative documents: · EN50081-1/EN55022; 1995 · EN50082-1/IEC 801-2, 3, 4; 1992 following the provisions of: · 73/23/EEC ­ Low Voltage Directive · 89/336/EEC ­ EMC Directive Declaration of Conformity ­ Japan Apogee Electronics Corporation hereby declares that the Mini-MP, to which this declaration relates, is in material conformity with the VCCI Class A standard. Declaration of Conformity ­ Australia Apogee Electronics Corporation hereby declares that the Mini-MP is in material conformity with AN/NZS standard requirements. e Mini-MP ­ User's Guide APOGEE ELECTRONICS OWNER'S RECORD The serial number is located on the rear panel of the unit. We suggest you record the serial number in the space provided below. Refer to it whenever you call an authorized Apogee Electronics repair facility or the manufacturer. Please be sure to return your completed warranty card immediately! Mini-MP Serial No. Purchase Date Dealer Phone Address User's Installation Notes: CAUTION: Any changes or modifications not expressly approved by APOGEE ELECTRONICS CORPORATION could void your authority to operate this equipment under the FCC rules. f Mini-MP ­ User's Guide APOGEE ELECTRONICS User's Guide Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Getting Started Quickly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Navigating the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 48 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 High Pass Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Polarity Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 GAIN controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Level meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 OUTPUT control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 POWER switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Connections on the Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 POWER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 L-R OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 L-R IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MS Recording & Playback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 The MS Microphone Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 The MS Decoding Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Using MS Mode on the MiniMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Advanced Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Internal Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Polarity Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Features & Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1 Mini-MP ­ User's Guide APOGEE ELECTRONICS Introduction Apogee Electronics' Mini-MP is a two-channel microphone pre-amplifier with superb performance in a convenient, portable package. The MiniMP has the following features: · · · · · Up to 70 db of gain in the Mic-pre section, with an additional 6 db in the Output section +18 dBu Maximum input level; 26 dBu maximum output level High impedance instrument inputs provids Direct box functionality MS Decoding Matrix Phase, High-Pass and 48 Volt Switches Included Accessories: The following items are shipped with the Mini-MP. Please save the box and foam to safely transport the unit: · Universal 12-volt power supply and AC power cable · Operation manual/warranty card · Allen wrench (for internal adjustments) Optional Accessories: · Carrying case ­A rugged black nylon carrying case is available for all Mini series devices, complete with strap, extra pockets and purpose-built cable access ports. · "Mini-Rack"- A 1U rack frame for securing all three Mini-Series products. 2 Mini-MP ­ User's Guide APOGEE ELECTRONICS Getting Started Quickly 3 1 2 4 6 5 (1) Connect the included power supply to the POWER connection on the back of the Mini-MP and to a convenient AC Outlet. As the power supply's AC input voltage is automatically sensed, it may be connected to virtually any AC power outlet found worldwide without concern for voltage settings or fuse ratings. (2) Connect either a microphone or instrument to either the L(Left) or R(Right) IN connection on the rear panel. If using a microphone that requires phantom power, press and hold the corresponding 48v switch to the right until the blue led comes on . (3) Connect the corresponding OUT connection to an analog line input such as the Apogee Rosetta 800 A/D converter (4) Set the POWER switch to ST(Stereo). (6) While the connected sound source is active, turn the corresponding GAIN control clockwise until the +6 LED lights; if the CLIP LED lights, adjust the GAIN control counter-clockwise. 3 Mini-MP ­ User's Guide APOGEE ELECTRONICS Navigating the Front Panel 7 1 L 5 L 5 R 1 R 2 L 3 3 4 R L L 6 4 R 2 R 1) 2) 3) 4) 48 V (Left and Right) ­ These switches engage 48 volt phantom power on the corresponding IN connections, for powering of microphones which require this voltage. To avoid inadvertently switching 48V, the switches must be pressed to the right for approximately 1 second before the function is actually engaged or disengaged. High-Pass (Left and Right) ­ These switches engage a high-pass filter on the corresponding channel; the filter has a corner frequency of 80 Hertz and rolls off with a slope of 18dB per octave. [. . . ] To better hear the characteristic of the Mid and Side components of the Left-Right output, decrease the RIGHT / SIDE control to minimum, leaving the center mono Mid signal; next decrease the LEFT / MID control to leave only the "phasey" unstable Side signal. In practice, a 3 to 1 ratio of Mid to Side signal is considered an appropriate point of departure. 6 Mini-MP ­ User's Guide APOGEE ELECTRONICS MS Recording and Playback Advanced Techniques continued To better understand the behavior of signals when employing MS Techniques, the manner in which these signals are routed and summed may be expressed as formulae. For example, the MS Decoding Matrix may be expressed as: Left Output Right Output = = Mid Input + Side Input Mid Input + (-Side Input) or more generically as: L R = = M+ S M-S Thus, when the Left and Right Output are summed to mono, the result may be predicted using these formulae: L+R = (M + S) + (M ­ S) = 2M The stereo component has cancelled out while the mono component has added together, resulting in a perfect mono reproduction of the stereo signal. With a Mini-MP it's also possible to encode Left ­Right stereo signals to Mid ­ Side by inputting the Left ­ Right signal while the unit is in MS Mode. [. . . ]