6800/7000 Series - Audio and Video Multi/Demultiplexing Products Installation and Operation Manual
63
Operation
Chapter 5: DAC-6880 AES/EBU Digital Audio to Analog Audio Converter
Operation
Input Impedance
The DAC-6880 accepts either 110
Ω
balanced or 75
Ω
unbalanced digital
audio signals. The input impedance is set at the factory by the rear
module/adapter ordered and the front card-edge jumpers:
Terminated or Looping Inputs
The unit is factory set for looping inputs. To adjust the input impedance
to accommodate terminated inputs (non-looping) or looping inputs, use
the following instructions:
Full-Scale Analog Output Level
The full-scale analog output level can be set to +18 dBu or +24 dBu
through mid-card jumpers. To set the output level to +18 dBu, set
jumpers
J3
and
J4
to the frontmost position. To set the output level to
+24 dBu, set jumpers
J3
and
J4
to the rear position.
Figure 5-2.
DAC-6880 Full-Scale Analog Output Level
• To set to 75
Ω:
Set jumpers
J5
and
J6
to front most position
• To set to 110
Ω:
Set jumpers
J5
and
J6
to the rear position
• Terminated Inputs:
Set jumpers
J7
and
J8
to the rear position
• Looping Inputs:
Set jumpers
J7
and
J8
to frontmost position
DAC-6880
DC-DC
CONVERTER
POWER ON
ERROR
J6
J5
J7
J8
J3
J4
18
dBu
24
dBu
18
dBu
24
dBu
