10
DownMix
User
Manual
Rear
Panel
AES INPUTS
- Four 75
Ω
BNC connectors will accept an AES3 digital audio stream.
AES OUTPUTS
- Three 75
Ω
BNC connectors output the down mixed AES3 digital audio stream.
AES SYNC
- Two 75
Ω
BNC connectors that allow DownMix to receive an AES REF or DARS
clock signal from an external source and pass it on to other devices.
The AES-3id-1995/SMPTE 276M standard dictates a 75
Ω
unbalanced connection and requires
proper termination. The termination should occur at the destination of the signal (that is, on the
inputs to DownMix). If the loop-through BNC connectors are not feeding additional equipment,
terminate each of these with a standard 75
Ω
terminator. Like other inputs, AES SYNC signal
should be terminated.
GPIO
– A Female DB-9 connection that allows DownMix to be monitored or controlled externally.
Opto-isolated inputs will be triggered by a voltage of 5VDC.
DB-9 Female Port
on DownMix Rear Panel
Output 1
: Relay 1 is Normally Open. Upon a hardware failure (i.e. Power Supply or Internal
Communications Failure), the relay will close. When the failure is remedied, the relay will open.
Output 2
: Relay 2 is Normally Open. Upon an AES lock loss failure, this relay will close. When
the failure is remedied, the relay will open.
Pin Signal
1
Output Relay 1 N.O.
2
Relay 1 Common
3
Optical Input 0
4
Optical Input 1
5
Optical Input
Common
6
Output Relay 2 N.O.
7
Relay 2 Common
8
Optical Input 2
9
Optical Input 3
