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Table of Contents
Summary of Contents for ATI Audio MX100
- Page 1 MX100, MX100C, MX101 & XP100 MONO OUTPUT MIXERS and INPUT EXPANDER OPERATING AND MAINTENANCE MANUAL Model MX101 Model MX100 Model XP100 © Copyright 2011, ATI Audio Inc. ATI Audio Inc. ■ Tel: 856-626-3480 Fax: 856-504-0220 ■ sales@atiaudio.com www. audio.com ■...
- Page 2 The MX100 and MX100C Studio Mixers are lower cost, high quality studio mixers intended for applications which do not require the full feature complement of the MX101 field mixer. The MX100C adds an output limiter to the basic MX100 fea- tures.
- Page 3 MX100 AND MX100C STUDIO MIXERS Both the MX100 and the MX100C also provide three inputs with front panel se- lection of microphone or line input levels. Phantom power and input stage gain is DIP switch programmable for any input.
- Page 4 CIRCUIT DESCRIPTION INPUT STAGES The inputs of the MX101, MX100 and MX100C are identical. They are designed around a very low noise and low distortion, balanced and floating input instru- mentation amplifier. The SSM2017 is one of the latest generations of devices de- signed specifically for use as a low noise microphone amplifier.
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Page 5: Phantom Power
PHANTOM POWER Phantom power at regulated +20.2VDC through an equivalent 1.66Kohm resis- tance is supplied to a microphone when the appropriate rocker DIP switch (S11, S21, S31 position 1) is selected ON and the MIC/LINE pushbutton is in the MIC position. -
Page 6: Led Metering
A front panel 1/4” TRS (stereo) jack and thumbnail-adjust gain control provides a monaural, in-phase signal to both sides of a set of stereo headphones. Only ste- reo headphones should normally be used with the MX100; however, mono phones can be used in a pinch at reduced levels. The headphone output pro- vides 100mW to phones of up to 600 ohm impedance and reduced levels into higher impedance phones. - Page 7 J7 and J8. The nominal output is +4dBu through a 200K-ohm source resis- tance, which feeds the current summing expansion input of the MX100 when so connected. The paralleled output jacks, J7 and J8, allow multiple XP100 units to be looped together and into the mixer.
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Page 8: Battery Power
Each MX100 draws about 120mA and each XP100 draws 70mA; therefore, one MX100 could be combined with up to four XP100 units on a single power supply module (120 + (4 X 70) = 400mA). Any combination which totals less than 400mA can be powered by a single WA100-1 supply. -
Page 9: Set-Up Adjustments
er. Make sure you have unpacked any battery packs or converters you have or- dered. Rack and desk mounting hardware may be packed in with the unit even though ordered separately. Wall mount power supplies may either be included in with the unit or shipped in their own box. -
Page 10: Audio Connections
POWER CONNECTIONS Hum and noise performance of the XP100 can be degraded by poor DC ground connections between it and the MX100. Use of the recommended rack and desk mounting kits will assure a good ground connection between units by firmly ATI Audio Inc. -
Page 11: Maintenance
An internal reference voltage equal to 1/2 the supply voltage is generated by A9 in the MX100 and A5B in the XP100. All audio stage inputs and outputs should show a DC level equal to this voltage when measured with a high impedance meter. - Page 12 SWITCH MAINTENCE The front panel MIC/LINE switches have good wiping contacts and should need little attention. The switches are sealed and impossible to clean. In addition, most spray solvents will wash out the internal lubricant and cause premature mechani- cal failure. A good fix, if the switches get noisy, is to sit down at the unit, think about your girl friend for a while (or Britney Spears or Madonna, depending on your age bracket) and push those little red buttons about 500 times each.
- Page 13 PHANTOM POWER: +20VDC regulated @ 4ma through paralleled 3.32K Ohm resistors POWER: 24VDC, 22 to 30 VDC max. MX100 and MX101 draw 120 mA nominal, 150 mA max. XP100 draws 70 mA nominal, 82 mA max. DIMENSIONS in. (cm): 1.75(4.45)H X 5.6(14.22)W X 5.75(14.6)D WEIGHT 1.25 lbs.
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Page 14: Power Supplies
CUE (Director Input): MX101 only: Unbalanced -10dBu, 2.5 mm T-S jack. POWER SUPPLIES: WA100-1 Wall mount power supply (UL), 24VDC @ .4amp, 115 VAC/60 Hz, included as standard WA100-2 Wall mount power supply for international use, 90-264VAC input via interchangeable connec- tors, 24VDC @ .4 amp output (optional) Rack Mount Kits: 21075-501... - Page 15 battery charger operating at 115VAC/60 Hz PPA-2 Same as above except battery charger operat- ing at 230VAC/50 Hz; Euro-plug; Contact fac- tory for other plug configurations PPA-B Extra 24VDC rechargeable gel-cell battery pack, charger not included DCA100-1 Integrated DC/DC converter, mounts to the mixer and accepts external battery power with DC inputs from 6 to 18 volts to produce 24VDC mixer power;...
- Page 16 One Year Limited Warranty ATI warrants this product to be free from defects in materials and workmanship to its original owner for a period of one year from date of purchase. ATI will repair or replace such product or part thereof, which upon inspection by ATI, is found to be defective in materials or workmanship. The Proper Return Authorization Number must be obtained from ATI in advance of return.
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