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IMPORTANT SAFETY INSTRUCTIONS – READ FIRST

  This symbol, whenever it appears,

     This symbol, wherever it appears, alerts

  alerts you to the presence of uninsulated 

      you to important operating and maintenance

  dangerous voltage inside the enclosure-voltage 

      instructions in the accompanying literature.

  that may be sufficient to constitute a risk of shock. 

      Read manual.

Read instructions:

Retain these safety and operating instructions for future reference. Heed all warnings printed here and on the equip-
ment. Follow the operating instructions printed in this user guide.

Do not open:

There are no user serviceable parts inside. Refer any service work to qualified technical personnel only.

Power sources:

Connect the unit to mains power only of the type described in this user guide or marked on the rear panel. The power
source must provide a good ground connection.

Power cord:

Use the power cord with sealed mains plug appropriate for your local main supply as provided with the equipment. If
the provided plug does not fit into you outlet consult your service agent. Route the power cord so that it is not likely to
be walked on, stretched or pinched by items placed upon or against.

Grounding:

Do not defeat the grounding and polarization means of the power cord plug. Do not remove or tamper with the ground
connection on the power cord.

Ventilation:

Do not obstruct the ventilation slots or position the unit where the air required for ventilation is impeded. If the unit is to
be operated in a rack, case or other furniture ensure that it is constructed to allow adequate ventilation.

Moisture:

To reduce the risk of fire or electrical shock do not expose the unit to rain, moisture or use in damp or wet conditions.
Do not place container of liquid on it, which may spill into any openings.

Heat:

Do not locate the unit in a place close to excessive heat or direct sunlight, as this could be a fire hazard. Locate the
unit away from any equipment, which produces heat such as: power supplies, power amplifiers and heaters.

Environment:

Protect from excessive dirt, dust, heat, and vibration when operating and storing. Avoid tobacco ash, drink spillage
and smoke, especially that associated with smoke machines.

Handling:

To prevent damage to the controls and cosmetics avoid rough handling and excessive vibration. Protect the controls
from damage during transit. Use adequate padding if you need to ship the unit. To avoid injury to yourself or damage
to the equipment take care when lifting, moving or carrying the unit.

Servicing:

Switch off the equipment and unplug the power cord immediately if it is exposed to moisture, spilled liquid, objects
fallen into opening, the power cord or plug becomes damaged during a lightning storm or if smoke odor or noise is
noted. Refer servicing to qualified technical personnel only.

Installation:

Install the unit in accordance with the instruction printed in this user guide.

Summary of Contents for DIGITAL MPA

Page 1: ...t obstruct the ventilation slots or position the unit where the air required for ventilation is impeded If the unit is to be operated in a rack case or other furniture ensure that it is constructed to...

Page 2: ...mple Rate Control 7 Optical Switch 8 Front Panel Connections 8 Instrument Inputs 8 Rear Panel Connections 8 Balanced Inputs 8 Balanced Outputs 8 Insert Jacks 9 Word Clock Jacks 9 ADAT Input 9 Optical...

Page 3: ...and tube warmth Improved discrete class A input microphone preamplifier Lower noise at low gains Lower THD Wider frequency response Front accessible Instrument Input Jack Very high input impedance Aut...

Page 4: ...ore or less tube sound as needed To obtain more tube sound increase input gain use the 20dB Gain switch normal plate voltage and less analog output gain Both the microphone and instrument inputs are o...

Page 5: ...is switch Depressing the switch will power condenser microphones and other 48volt phantom powered devices Phantom power is supplied to pins 2 and 3 of the input jack NOTE 1 Dynamic microphones are NOT...

Page 6: ...aturates for normal and high plate voltage settings respectively Digital Section Front Panel Controls Digital Level Control The levels driving the A D converter are adjusted with this control The topo...

Page 7: ...the DMPA will use its internal crystal controlled oscilla tor to accurately generate the selected timing Be careful in adjusting this control Some equipment is not capable of the available sample rate...

Page 8: ...erve as an instrument input The input impedance is always 1M Ohm and the gain can be adjusted by the Input Gain Control The maximum input signal level is 17dBu 5Vrms minimum input gain When you plug i...

Page 9: ...igital output connectors In ADAT mode the DMPA transmits its A D data on the first two channels and passes information from the ADAT input jack CH3 8 on to the other channels Using the optical output...

Page 10: ...the switch under the center of the analog meter The meter will now indicate how much tube headroom there is Set the 20dB switch to the out position Rotate the Input Level Knob until the meter reads a...

Page 11: ...ill provide the best dynamic range AND the tube will saturate before the A D clips on heavy overloads If you want more tube headroom set the digital level control fully clockwise If you need to compre...

Page 12: ...ions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs This warranty is void if the serial number is altered defaced or...

Page 13: ...substitute The packing box is not recom mended as a shipping carton Put the packaged unit in another box for shipping Print the RA number clearly on the outside of the shipping box Print your return...

Page 14: ...ms Instrument Maximum Output Level 27dBu XLR Output Impedance 47 Ohms XLR Maximum Gain 75dB Meter Calibration 0 VU 4dBu output High Pass Filter single pole 10 200 Hz adjustable Power Requirements 100...

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