12
The information window disappears after 4 seconds if no further key has been pressed. Depressing a key
once will result in a parameter changing by the smallest applicable increment. The adjacent fader will be
selected, or a level will be adjusted by 0.5 dB. Depressing and holding the cursor key results in a continuous
change in the parameter. The rate of change remains constant. You can increase the rate of change by first
depressing and holding the key used to change the relevant parameter, and then, still holding the first key,
depress the one opposite.
2.1.2 The Level Meter
By pressing softkey A
you leave the main EQ window and access the menu to display levels.
Fig. 2.3: LEVEL METER display
You can use the LEVEL METER to control the input and output levels of the ULTRA-CURVE PRO. The
bargraph display controls the effective RMS level (massive parts of the bars), and the peak level (checkered
tips of the bars), both simultaneously. To save your eyes, the release time of the peak display is 20 dB/s. The
maximum levels are memorized and numerically displayed.
When the limiter threshold is exceeded, the indication LIMIT will appear in the level meter display to indicate
that the limiter is attenuating the output. The limiter is switched on by entering a limiter threshold in the EQ-
setup menu (chapter 2.1.6). The limiter of the ULTRA-CURVE PRO looks ahead a couple of samples to
anticipate audio dynamics. This enables a smooth and, within obvious limits, unobtrusive limiter operation.
Therefore the LIMIT indication is shown immediately when the limiter engages, even before the gain reduction
becomes noticeable.
With key A
you leave the LEVEL METER, and return to the main EQ window. With key B
you
erase the maximum levels from the memory. With key C
/
you switch the display from the
ULTRA-CURVE PRO input and output. With key D you can choose between three different tables of reference
levels.
The 0 dB point is indicated by a bold marker, while at the same time, the numerical display changes.
refers to the digital peak level. THIS LEVEL MAY NOT, UNDER ANY CIRCUMSTANCES, BE EXCEEDED!
This will result in a very noticeable form of distortion, which occurs much faster, and sounds very much more
unpleasant, than the familiar distortion associated with analog devices.
refers to the operating level found in professional audio equipment (analog inputs and outputs of the
ULTRA-CURVE PRO).
refers to the operating level found in homerecording and domestic audio equip-
ment, a typical example being tape recorders with RCA connectors. When setting the ULTRA-CURVE PROs
internal level, or when using the optional AES/EBU interface, the peak level display of the Dig Max scale is
the ONLY one to use.
The +4 dBu and -
dBV scales serve to monitor the analog inputs and outputs of the ULTRA-CURVE PRO. Please note that the
RMS level will usually be quoted in the technical specifications of analog devices for example, for the input
sensitivity of power amplifiers. The effective level always lies below the peak level. The difference between
them depends on the signal characteristics for a static sine wave, the effective level is about 3 dB below the
peak level. For a dynamic signal the difference is in the region of 8 dB.
The Dig Max level is, of course, related to the analog input and output levels, as 0 dB Dig Max corresponds to
the maximum output level of the ULTRA-CURVE PRO. The following example, using a sine wave at maximum
2. OPERATION
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Summary of Contents for ULTRA-CURVE PRO DSP8024
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