Sound Performance Lab 9737 manual Operation Safety, Indicators and meters

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Indicators and meters:

MACHINE HEAD is equipped with PPM displays for input and output levels. The first LED of each input and output meter is a signal (SIG.) LED which illuminates when a compatible digital data stream is present at the inputs. The LEDs are a first indi- cator to check the data stream. If the LEDs do not illuminate the data stream is interrupted or invalid.

The top LEDs of each input and output meter indicate if a digital clip has occured at the inputs or due to processing within MACHINE HEAD. Clipping that is already present at the inputs will also be shown on the OUTPUT PPM chains.

The DRIVE LED chains display the drive or recording level that is sent to the virtual tape. The values shown range from -10dB to +21dB.

The philosophy behind the digital audio processors is that they are designed to be operated like analogue units; there is only one INFO menu but no multi-function controls. The LCD readout simply shows the current encoder positions and the preset number. The encoders are built without clicks or detents, so they feel like analogue pots. Our DSP platform uses two Motorola 56002 DSPs running at 66MHz. This enormous computational power guarantees real-time operation where sophisticated DSP algorithms will not be restricted by resource limitations. The general concept is that each digital processor should fulfill only one task, in the most effective way possible, and with a minimum of controls and switches. As much as possible should be automated to promote user-friendly opera- tion – the external controls access only the sonically relevant parameters.

The housing of the MACHINE HEAD has the standard 19"- EIA format and occupies 1U (44.45 mm) in your rack. When instal- ling the unit in a 19"-rack, the rear side of the unit needs some support, especially in a touring case.

The MACHINE HEAD should not be installed near units which produce strong magnetic fields or extreme heat. Do not install the MACHINE HEAD directly above or below power amplifiers.

Check that the voltage details quoted on the back panel are the same as your local mains electricity supply. Use a minus (-) screwdriver to set the voltage selector to the voltage for the area in which the unit will be used.

Never cover up the ventilation slots on the top of the unit. If, during operation, the sound is interrupted or indicators no longer illuminate, or if abnormal odor or smoke is detected, or if liquids are spilled on the unit, immediately disconnect the power cord plug and contact your dealer.

Only clean your MACHINE HEAD with a soft, lint-free cloth.

Machine Head

SIGNAL-LEDs to verify data stream

Clip-LEDs

Input and Output

PPM metering

DRIVE-LED displays recording level

The DSP Platform: Enormous computational power guaranteeing real- time operation

„Analogue“ control feeling

User-friendly programmed software

Operation Safety

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Contents Machine Head By Hermann Gier Version 1.3 1/1999 ModelWe wish you every success with the Machine Head Contents Foreword ThanksSpecifications Warranty Dear customer Introduction Machine HeadIndicators and meters Operation SafetyConnections Installing UpdatesIf an error occurred during download the LC-display says Analogue Tape Quick StartAll controls are in the start-off positions Press ACTIVE. LED illuminatesDrive Control ElementsActive Machine HF-AdjustHF-ADJUSTcontrol allows you to control the amount LC-display Output GainLED chains It is variable between -12dB and +12dB in 0.1dB stepsPresets Depressing Store and Apply simultanouesly for about one InfoSoftware version and date Selecting inputs AES/EBU input detectedDisplaying the CRC-Error flag Displaying the Audio-Error flagDisplaying the Channel Difference Error flag Setting or erasing the Copy-Prohibit flagNo = no emphasis YES = with emphasis Displaying the Emphasis flagSelecting a serial port Selecting a Midi channelInput/Output SpecificationsWarranty
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