Enova DGX Audio Insert/Extract Boards
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Hardware Reference Manual – Enova DGX 100 Series Digital Media Switchers
AIE Board Troubleshooting
Problem - Audio is not present or is not at expected destination device.
Possible Solution #1 - Re-wire to a different connector:
To verify input and/or output connection, check the connector numbers on the AIE Boards. The AIE connector numbers
correspond directly to the numbers for the standard input or output connectors that they insert audio into or extract audio
from. AIE 1 works with standard Input 1, AIE 2 works with standard Input 2, etc.
Enova DGX 800 only - Depending on location, AIE Board connectors 1-8 correspond to standard input or output connectors
1-8. Connectors 9-16 are inoperable.
Enova DGX 3200 only - Remember that the AIE Boards will not work with connectors 17-32, which are on the boards in the
last four input and last four output board slots.
Possible Solution #2 - Re-install board:
Verify that the AIE Board is seated correctly by repeating the re-installation procedure.
Test/check the insert/extract functionality again.
Problem – Connecting to balanced audio input device results in extracted audio buzzing.
Solution – Re-wire audio connections:
Wire the AIE connector as follows: AIE L to device L+; AIE R to device R+; AIE ground to device R-; and a jumper from
device R- to device L- (see FIG. 103 below).
Problem – AIE extracted audio from an HDMI output drops out over time. Probably due to upstream unstable/garbage video
introduced onto the HDMI output port with no sink connected.
Solution – Connect a sink to the HDMI output port:
Verify the cause by sending the DGX_SHELL commands: power OFF EXPOUT followed by power ON EXPOUT. If the audio
signal recovers, not having a sink connected to the HDMI output port was likely the cause.
Connect a sink with a valid EDID to the open HDMI output port. The sink can be something like an EDID emulator or a
monitor. Optionally, you can loop back the HDMI output port to an unused HDMI input port.
The problem is resolved when the audio no longer drops out.
Options for Wiring AIE to Balanced Audio Input Device
CAUTION: Connecting AIE output left and Right channels to the same point to obtain a single channel may damage the AIE Board.
Standard Wiring
The wiring in FIG. 102 is the standard way to wire an AIE connector to a balanced audio input device.
If Necessary – Wiring to Eliminate Buzzing
The wiring in FIG. 103 can be used if the extracted audio buzzes when connected to a balanced audio input device.
FIG. 102
Standard wiring from AIE to balanced audio input device
FIG. 103 Wiring from AIE to balanced audio input device if buzzing occurs
AIE output
Balanced audio input device
AIE output
Balanced audio input device
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