Aphex 141 - Manual (Page 5)

Model 141 ADAT to Analog Converter
Model 142 Analog to ADAT Converter
Model 144 AES/ADAT Bi-directional Converter
Analog Audio Level
+24dBu is the maximum analog audio input level into the Model 142 and the maximum analog audio
output level from the Model 141. This level corresponds to 0dBfs (full scale) in the digital domain.
There is a trimmer for each analog audio input to the Model 142 that adjusts the gain by 12dB.If the
unit is being fed by a professional level device (0Vu = +4dBu) the gain trimmer should be set to “0”. If
the Model 142 is being fed by a consumer level device (0Vu = -10dBV) the trimmer should be set to
“+12”.
There is a trimmer for each analog audio output of the Model 141 that adjusts the gain by 12 dB. If
the unit is feeding a professional level device (0Vu = + 4 dBu ) then the trimmer should be set to “ 0 “ .
If the Model 141 is feeding a consummer level device ( 0 Vu = - 10 dBV ) the trimmer should be set
to “- 12“.
When there is a valid word clock connection to the Model 142 (at 48 kHz only ), the LED will turn
green.There is a red LED next to each input trimmer on Model 142. It illuminates when the input
signal exceeds +24dBu to indicate clipping on that channel.
There are three green LED’s on the Model 144. When power is applied the “Power” LED is lit.
When a valid ADAT signal is present (either at 44.1kHz or at 48kHz) the “ADAT LOCKED” LED is lit.
Wen
When there is AES input (there must be the connection to AES Channel 1,2 at either 44.1 or 48kHz)
the “AES LOCKED” LED is lit.
If there are any red LED’s illuminated it indicates a problem somewhere in the system.
Note: The ADAT to AES circuit is completely independent from the AES to ADAT circuit.
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