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SoundPals User's Guide ADC-20 • 23
Connecting Outputs
Connect the digital audio output from one of the
AES OUT
connectors
on the front or rear panel, and route it to the input of the desired
destination device. Both AES3 and AES3ID outputs may be used
simultaneously.
ADC-20 Operation
This section provides instructions for aligning the ADC’s inputs with
the gain controls.
Using the Gain Controls
For setting the left and right channel analog input levels, each input has
its own level adjustment on the front panel. Inputs are factory-set for
+4 dBu at -20 dBFS. Other levels can be set by using the following
alignment procedure:
To align the left and right analog outputs:
1. Connect a reference analog tone generator to the ADC-20’s
LEFT IN and RIGHT IN connectors.
2. Turn on the reference tone generator, and adjust it to the level
that you want to correspond to
−−
20
dB below digital clipping.
3. While watching the ADC’s front panel Level Indicator LEDs ,
adjust the ADC’s
L
and
R GAIN
trimmers — until the
−−
20
dB
LED just comes on.
This setting provides 20 dB of headroom, based on the selected analog
input reference level.
Setting the Sample Frequency
Refer to the “ Connecting AES Reference ” section for instructions on
changing the ADC’s sample frequency.