SPL Channel One 2950, Руководство пользователя

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Power Supply
GAIN REDUCT.
The GAIN REDUCT. display provides information about the processing being undertaken with
the compressor/limiter or the noise gate. The level changes, perhaps caused by compres-
sion, are scaled in 1.5 dB steps. The display is activated when the compressor/limiter module
is switched on.
Noise gate operation is visualized by illumination of all GAIN REDUCT. LEDs when the signal
level lies under the gate threshold setting.
PPM OUTPUT
The PPM OUTPUT display shows the peak reading of the output level (calibrated to 0 dB) and
is present at the rear outputs. This display also serves to level the preamplifier. The value
“0dBFS” marked on the left side represents the maximum level of the optional AD converter
which should not be exceeded (further information is given in the manual of the AD converter
and on page 29).
Although the values of the PPM OUTPUT display only cover up to + 12 dB sufficient headroom
remains internally (approximately 6 dB) so that the output value can exceed this limit without
causing clipping. The range of optimal noise performance lies between 0 and + 9 dB.
Built around a toroidal transformer, the power supply ensures a minimal electromagnetic
field with no hum or mechanical noise. The power supply‘s output side is filtered by an RC
circuit to extract noise and hums caused by your power service. 6000µf capacitors smooth
out the positive and negative half waves.
The phantom power is derived from a separate winding in the transformer, a precise current
regulator a clean phantom power of 48 volts. Our high quality 0.1%/6,81 kOhm resistors
ensure the pristine quality of the phantom power supply.
The 250 Volt power supply for the tube stage is filtered with 300 µF to minimize hum.
Further information on page 9.
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Channel One
Display area
Control Elements