Genelec 8130A Operating Manual page 3

Figure 1. Connectors and controls on the back panel of the 8130A
Connecting the 8130A
Connect your audio signal cable to the
female XLR connector labelled ANALOG IN,
DIGITAL IN AES/EBU on the 8130A's back
panel. The input connector can be fed with
either AES/EBU formatted digital signal or
analog line level audio signal.
When using digital audio signal, you can
identify the right connector on your audio
source by looking for the words "Digital
Output" or "AES/EBU". Before you connect
it to the 8130A you should make absolutely
sure that the connector is carrying AES/EBU
formatted digital audio signal.
Connect the mains cable to an earthed
mains connector, never to an unearthed con-
nector.
Setting up for digital signals
Use the "AES/EBU CHANNEL" switches to
select which of the two channels carried by the
digital signal you want to be reproduced (A, B
or A+B). The factory default setting is A. The
8130A also accepts a dual-wire/single channel
signal, which is automatically detected. In this
mode the "AES/EBU CHANNEL" switches only
affect the output level, which is 6 dB higher
when both switches are set to "ON".
The "SYSTEM LEVEL" switches can
be used to attenuate the level by 10, 20 or
30 dB. Start with all these switches set to
"OFF" and increase the level gradually using
the volume control knob. The effect of the
switches and volume control knob is cumu-
lative, but consistent attenuation between
several loudspeakers is easier to achieve by
turning the volume control to maximum set-
ting and using the switches alone.
Level adjustment for
analog signals
Note that the "SYSTEM LEVEL" switches
on the back panel of the loudspeaker have
no effect on the output level when reproduc-
ing an analog signal. In this case, use the
volume control knob on the front panel to
adjust the level.
Mode indicator LED
The mode indicator LED on the front panel
of the 8130A changes colour according to
the audio signal. Green colour indicates that
the loudspeaker is switched on and operat-
ing in analog mode. When the loudspeaker
detects a valid digital signal being fed to its
input connector, the LED turns yellow. A
transmission fault is indicated by the LED
turning red. See chapter "Troubleshooting
for digital signals."
Troubleshooting for digital
signals
The following steps cover some typical
causes for faults in monitoring digital sig-
nals.
• Make sure that your audio signal source
has been set to transmit the audio to the
AES/EBU output.
• Make sure the digital interface cable is
specified for use with AES/EBU digital
audio signals and properly connected at
both ends.
• Make sure the LED turns yellow as you
plug in the digital audio cable to the
8130A unit. If this is not the case, go
back to your audio source and check
once more that the correct output is
selected. If the LED stays green you do
not have a valid digital audio carrier on
the cable.
• If you see the LED showing red colour,
check your cabling. Red colour indicates
a bit error in transmission.
Daisy-chaining several
8130A loudspeakers
There are three alternative configurations for
using up to eight 8130A loudspeakers con-
nected together:
Digital master, digital slaves
In this configuration, a digital signal is fed to
the first ("master") loudspeaker of the chain
and then forwarded through the "DIGITAL
THRU AES/EBU" connector to the follow-
ing "slave" loudspeakers. Each loudspeaker
in the chain operates in digital mode and
can be individually set to reproduce either
A, B or A+B channels carried by the digital
signal by using the "AES/EBU CHANNEL"
switches as described above. Possible level
settings are done to each loudspeaker indi-
vidually by using the "SYSTEM LEVEL"
switches and/or the volume control knob.
Note that there is no signal from the "DIG-
ITAL THRU AES/EBU" connector when the
input signal is analog. If you need to use
several 8130A's daisy-chained together for
analog monitoring, connect them through
the "ANALOG OUT" connector as described
below.