User manual

I/O CALIBRATION AND SYSTEM SETUP ENG
Page 38
20.2 ANALOG INPUT LEVEL ADJUSTMENT
Skip this step if you are not using the analog inputs.
This step calibrates the analog inputs to the level at which your studio system peaks its program material on the studio
meters. This assures that the processing presets will operate in their optimal range.
To take full advantage of the processor
potential, the AGC value should normally
operate in compression mode (meaning that
it slightly reduces the input level). This is
indicated on the display by a negative sign
(the image here below indicates f.i. – 3 dB), while a positive sign means there has been an expansion or gain
increase. When the message ‘Gated’ appears on the display, it indicates that there is no incoming signal, or the signal is
below the minimum AGC threshold.
The gain factor applied by the input stage to the incoming analog signal is set by the ‘Gain Offset’ control. It is crucial in
order to ensure a standard signal of 0 dB to the internal processor circuits
. For example: with a signal of 0dB, the Gain
Offset should be set to 0dB; with a signal of +4dB, the Gain Offset should be set to –4 dB.
DEFAULT SCREEN
INPUT CALIBRATION menu
GAIN OFFSET page
1) Play program material from your studio, peaking at the level to which you normally peak
program material (typically
0VU if your console uses VU meters).
In most pop and rock formats this is not a problem, but in classical or other wide dynamic range formats you may
have to wait for the loudest passage.
2)
adjust the Gain Offset parameter in the ‘Input Calibration’ menu until the AGC indicator display averages around - 2 /
- 3 dB with the most part of Yr standard source material.
3)
NOTE: If the Gain Offset control is not enough to achieve the AGC condition described above, adjust the output
levels of the audio source directly (mixers, PC audio cards, etc.). It may be acceptable to work with AGC levels
between -3 /- 4 dB and +3 / +4 dB.
4)
If Yr studio console or studio system can generate a test tone, you may also adjust the Gain Offset level with that
standard reference/line-up level tone (recommended).
20.3 MONO / STEREO INPUT OPERATION (ST AND TV VERSION ONLY)
The ‘INPUT MODE’ menu selects the mono versus stereo operation of the input.
On the ST version, You can chose between a full stereo operation or a Mono mode where Left and Right input channels
are mixed together before going through the main processing stages. NOTE: In the MONO L+R Mode, either the L or the
R output will provide the L+R sum.
On the TV version, You can chose between a full stereo operation or a Mono mode where Right input only is regarded as
source for processing stages.
DEFAULT SCREEN
INPUT CALIBRATION menu
INPUT MODE page