Wohler AMP2-DA User Manual download pdf (Page 12)

AMP2-DA Instruction and Service Manual P/N 821505 Rev-B Section 2: Operation

Front Panel Features

AES Source Select Switch

This two position toggle switch allows the operator to select either one of the two AES/EBU IN inputs (IN 1 or IN 2) on the

rear panel (Item C, page 14) as sources for monitoring. It should be noted that in order for the unit to monitor the selected

AES source, the ANALOG/DIGITAL Source Select Switch (Item 6, page 10) must be set to DIGITAL.

AES Signal Error Indication LED

This bi-color (GREEN/RED) LED indicates the input status of the AES input signal selected by the AES Source Select

Switch (1 or 2) (Item 10). This LED functions regardless of the position of the ANALOG/DIGITAL Source Select

Switch (Item 6, page 10).

The LED glows GREEN as long as a valid AES/EBU digital datastream for the associated input channel is being received. The

LED glows RED to indicate errors in reception or data errors (if the data has been tagged as inappropriate for conversion to

analog by having the validity bit set).

An optional feature of the AES signal error detection is the ability to mute the audio when errors are detected in the AES

signal. To enable this feature, a jumper is placed at H12 of the 919117 PCB. See page 30 for location of H12 on the 919117

PCB.

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Wohler AMP2-DA User Manual Page 12