Related Manuals for Grace m802
Summary of Contents for Grace m802
- Page 1 Preamplifier firmware version 2.2 owner’s manual Remote firmware version 2.0 Manual RevG all contents © Grace Design/ Lunatec LLC...
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Page 2: Table Of Contents
We have designed the m802 to be as easy and intuitive to use as possible. However, we strongly recom- mend that you read this product manual thoroughly to familiarize yourself with the unique features and capabilities of the m802. -
Page 3: Important Safety Information
Service Information The Grace Design m802 contains no user serviceable components. Contact Grace Design for repair and upgrade information. In the event that your Grace Design m802 needs to be returned to the factory, contact us for a return authorization number. -
Page 4: Overview
Philips I 2 C serial buss, which makes parallel connections between all of the devices in the system. In an m802 system, the RCU is the master and all of the preamplifiers are slaves. The data on the display of the RCU is echoed back from the preamplifier so it shows the actual status of the preamplifier. -
Page 5: Front Panel Diagram
After a period of 16 seconds with no activity on the MIDI input port, the m802 will automatically revert back to its normal control mode. See the MIDI Control section of this manual for more details on the MIDI control mode. -
Page 6: M802 Rcu Diagram
RCU Diagram remote microphone preamplifier CHANNEL SELECT GROUP VIEW SETUP GAIN / EDIT push +48 Volt phantom power pushbutton 7-segment LED display Ø phase reverse pushbutton DATA encoder with pushbutton GROUP pushbutton Page Up / Down pushbuttons VIEW / peak indicator reset pushbutton... -
Page 7: M802 Rearpanel With A/D Converter Diagram
Rearpanel with A/D Converter Diagram Digital output option A in- Digital output option B incul- cludes 2 sets of 8 channel AeS3 des 2 sets of 8 channel AeS3 out- outputs on DB25, Word Clock in puts on DB25, Word Clock in and... -
Page 8: Installation
Warning: A damaged DC power cord can create a shock hazard as Voltages of 66VDC (148VDC with the DPA Input option) can be present. Do not operate the m802 with a damaged DC power cord. Replace a damaged DC power cord with a replacement from Grace Design (WA084) only. -
Page 9: Audio Connections
RCU. Simply plugging the 2.1mm barrel connector into the DC power jack turns the power on. The m802 RCU is rated for 6.0-7.5V / 0.5A DC. (+) is in the center and (–) is on the outside sleeve. - Page 10 Digidesign Pro Tools® LooPSynC signal. For optimal performance when using the external clock connection, the m802 must be connected directly to a 75 ohm clock source. The external clock input is terminated to 75 ohms within the m802 and thus should not be terminated elsewhere. The clock out- put connector signal can be derived from two different sources, either a buffered copy of the incoming clock signal on the wordclock input connector, or the internally generated WoRDCLoCK.
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Page 11: Preamplifier Operation / Modes
+25dBu, which is indicated with a square “box”. The clipping level of the m802 is +25dBu. It should be noted that the bar graph meters in the m802 have an integration time that is approximately that of the DIn 45406 PPM meter standard. - Page 12 This is usually indicates that the AdcFs setting does not match the incoming clock rate. The A/D converter also configures the m802 level meters to display a 0dBFS scale instead of the stan- dard dBu scale. A/D converter sensitivity is factory set so that +22dBu level at the analog line outputs results in a 0dBFS level at the A/D converter.
- Page 13 2-wire operation is selected here and the AD sample rate is set at 44.1 or 48kHz the m802 digital outputs will revert to 1-wire operation. The physical output configurations for each of these modes is discussed in the ”Digital Audio Connec-...
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Page 14: Input Select
The Preamplifier ID: peak : hld contrast : 126 backlight : on This field allows one to select a unique identification for each preamplifier in a system. The ID number also assigns channel numbers to the preamplifier. For instance, ID 1 includes channels 1-8, ID 2 includes channels 9-16 and so on to ID 8, which includes channels 57-64. - Page 15 RCU. MIDI ConTRoL MoDe When the m802 detects activity on its MIDI input port, it will switch to MIDI Control mode. In this mode the m802 will emulate the Digidesign® pre microphone preamplifier. In Pro Tools® the mic pre controls...
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Page 16: A/D Converter Sensitivity Calibration
Digidesign pre. If there is no activity on the MIDI input port for a period of 16 seconds, the m802 will revert to its normal control mode. Pro tools sends a “heartbeat” mes- sage to all preamplifiers that are declared in the pro tools setups >... - Page 17 Remove the 8 top cover screws using a #2 Phillips driver. Lift the top cover off the unit and set it aside. Enter the ADC Sensitivity Setup menu by powering up the m802 while the PEAK button is pressed. Move the encoder until “ADC Sensitivity” is highlighted. Click the encoder to edit the parameter. Rotate the encoder to choose the sensitivity setting you wish to modify ((A) or (B)).
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Page 18: Operation Within Pro Tools
Gain Control: the m802 has a gain range of -7 to 63.5Db in 1.5db steps. When in MIDI control mode the m802 switches to a gain range of 0 to 63db in 3db steps. If the m802 has channels set to gain values... -
Page 19: Remote Control Unit Operation
MIDI control mode. If the MIDI control mode times out and the m802 returns to its normal control mode, all of the channel gain settings will be un- changed. The following table (figure 8) shows all of the gain settings available in the m802. The shaded cells indicate the gain settings that are available in MIDI control mode. - Page 20 GROUP: The GRoUP button has the same function as the GRoUP button on the preamplifier unit ex- cept that it lights up to indicate that Group mode is active. Group mode functions the same way on the RCU as it does on the preamplifier unit. note that the channel select buttons for all of the channels in a group will illuminate when their group is selected.
- Page 21 RCU contains the same menus as Setup mode on the preamplifier, with a few important distinctions. A/D converter Setup: For any preamp with the optional A/D converter module installed, the m802 RCU gives the user access to all of the converter setup parameters (except clock output selection). These controls do not function in a global manner like the preset operations, but rather affect the preamp that is currently active.
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Page 22: Cable Diagrams
DRAIN/SHIELD WIRE IS BELDEN 1883A DB9 MALE DB9 MALE 24 AWG TWISTED PAIR WITH FOIL SHIELD Serial Connector Pin Assignments m802 RCU DB9 pinout m802 Preamplifier DB9 pinout m802 Preamplifier DB9 pinout UPPER CONNECTOR LOWER CONNECTOR 1) I C DATA... -
Page 23: Specifications
Specifications PREAMPLIFIER SPECIFICATIONS FREQUENCY RESPONSE @ 40.5dB gain ± 0.2dB 50Ω source 15Hz-300KHz @ 40.5dB gain ± 3dB 50Ω source 4.5Hz-1.0MHz THD+N @ 19.6dB gain +20dBu out, 1kHz <.0007% @ 40.5dB gain +20dBu out, 1kHz <.0010% @ 60.0dB gain +20dBu out, 1kHz <.0050% INTERMODULATION DISTORTION @40dB gain +20dBu out... -
Page 24: Cleaning And Maintenance
10Hz Cleaning and Maintenance your m802 amplifier chassis is constructed out of high quality stainless steel. Under normal circum- stances, virtually no maintenance is required to keep the unit looking shiny and new. However, if your unit becomes smudged or dirty, here are some cleaning tips: We recommend using either Pledge furniture polish or Zep brand stainless steel cleaner (available at the hardware store). -
Page 25: Warranty Information
Warranty Information • Grace Design warrants all of our products to be free of defective parts and workmanship for a period of five years. • This warranty period begins at the original date of purchase and is transferable to any person who may subsequently purchase the product during this time. -
Page 26: Manual Revisions
Manual Revisions Revision Page Change Date Initials no revition history available updated 130V/ribbon mic mode info 03/23/2010 18,19 updated ProTools operation information 03/23/2010...