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4 CALIBRATION
4.1
The Sound Enhancer is factory calibrated for an analog input and output
signal
of 0 dB full scale is applied, the balanced analog
Furthermore if an analog input signal of 15 dBu is applied, the
puts
range of
If it is required to adjust or to recalibrate the Sound Enhancer first the
output m u s t be calibrated then the input can be calibrated. Do n o t
reverse this sequence. The Sound Enhancer can be calibrated for analog
input/output signals between 9 and 15 dBu.
4.2
1. Switch the Sound Enhancer off if powered up.
2.
3. Remove
4. Locate XLR PCB
A digital source is required for calibration of the outputs which can be a
CD-player, a DCC or DAT-player etc. It will be more convenient to use a
professional test system
4.3.
STANDARD
CALIBRATION
dBu
of 15
(unloaded).
will be 0 dB full scale. This ensures that the full 20 bit digital signal ‑
the
AD converter is used.
PREPARATION
FOR CALIBRATION
Make
sure the pot. meters on
clock wise, that is: unity gain.
cover, use appropriate
( r e f e r
CALIBRATION OF
Locate the trimpotmeters 3108 and 3109
Select digital input then
Connect a suitable dB -
Adjust the trimpotmeters so that both
ing. This is always between 9 and 15 dBu.
This means that when
the
front panel are fully turned
TORX screwdriver.
to figure
4.2).
like the
Precision "System One".
Audio
OUTPUT
THE
a digital source of 0 dBFs (1
connect
to the analog balanced
meter
outputs
digital input signal
a
will be 15 dBu.
outputs
digital out‑
anti‑
kHz)
outputs (L/R)
give the desired read‑
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