Sound Performance Lab 9737 - Manual (Page 5)

5
Machine Head
Operation Safety
Indicators and meters:
M ACHINE H EAD is equipped with PPM displays for input and
output levels. The first LED of each input and output meter is a
signal (S
IG .) 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
M
ACHINE H EAD . Clipping that is already present at the inputs will
also be shown on the O UTPUT PPM chains.
The D RIVE LED chains display the drive or recording level that
is sent to the virtual tape. The values shown range from -10 dB
to +21 dB.
The philosophy behind the digital audio processors is that
they are designed to be operated like analogue units; there is
only one I
NFO 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 66 MHz. 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 M ACHINE H EAD 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 M ACHINE H EAD should not be installed near units which
produce strong magnetic fields or extreme heat. Do not install
the M
ACHINE H EAD 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 M ACHINE H EAD with a soft, lint-free cloth.
S IGNAL -LEDs to verify data
stream
Clip-LEDs
Input and Output
PPM metering
D RIVE -LED displays recording
level
The DSP Platform:
Enormous computational
power guaranteeing real-
time operation
„Analogue“ control feeling
User-friendly programmed
software