Setting Up; Patchbay - Behringer Eurodesk SX3282 User Manual

14
All outputs are ground-compensated (decoupled from the
◊
mains supply earth) to eliminate the possibility of ground
loops.
Please make sure that every part of your equipment is
◊
connected to the mains earth. To avoid any risk of electric
shock never disconnect the mains earth from any part of
your equipment!
Please ensure that only qualified personnel install and
◊
operate the SX3282. During installation and operation the
user must have sufficient electrical contact to earth. Elec-
trostatic charges might affect the operation of the unit.
8.

Setting up

8.1 Selecting Inputs
1) Mono channels accept mic or line inputs. If you are using the
mic input, make sure nothing is connected to the line input
(and vice-versa). Please note that mic inputs are many times
more sensitive than line inputs!
Do not connect mics with phantom power switched on.
◊
NEVER use unbalanced mic cables with the phantom power
switched on ever! Shorting +48 V DC to earth can cause
serious damage.
2) Stereo channels accept line level signals. Any stereo channel
can be run in mono simply by connecting into the left jack
socket only.
This feature is disabled if all line level in-/outputs from the
◊
SX3282 are wired permanently to a patchbay (see section 9

"Patchbay").

The stereo channels are suitable for a variety of line-level
sources including MIDI instruments, effects outputs, and tape
returns from multitrack.
3) Stereo aux inputs are primarily designed for returning
effects units, though these too may be given over to multi-
track returns or MIDI instrument outputs.
8.2 Initializing Channels for Gain Setting
1) Set gain to minimum and all aux sends to "off" (fully counter-
clockwise).
2) Set EQ to flat (all knobs at 12 o'clock).
3) Where applicable, set LO CUT switch
for signals with desired very low frequency content.
4) Set Channel Mode to PFL (
5) Depress Solo switch .
( 1 3)
on for most mics, off
{ 6 }
up).
( 3 8)
8.3 Auditioning a Signal and
Setting Up a Channel
1) Make a typical noise, or roll the tape. There should now be
some activity at the main bargraph meters, indicating the
PFL level.
2) Adjust the gain control
{ 1 }
hitting +2 dB. Continuous signals should not exceed 0 dB.
3) With FX units, MIDI instruments and multitrack tape
recorders (pro +4 dBu, semi-pro -10 dBV), it is important
to match the operating level of the desk to that of your
machine. If you are not sure which level your external equip-
ment requires, try a 0 dB setting first. If the signal is too low,
turn the gain pot to the right.
A -10 dBV nominal operating level for an effects processor
◊
is almost certainly referenced to 0 dB on the unit's input or
output meter. If the FX processor has indication only for
input level, ensure that the output gives comparable, i.e.
'unity', gain.
4) If EQ is adjusted at any time, repeat steps 8.3 1) & 2).
5) If an insert is used to patch in a compressor, gate, EQ etc.,
use the outboard processor's bypass or effect off switch to A/B
monitor the effected and bypassed signals, which should be
level matched. (If the unit does not have a bypass switch or
equivalent, you will have to keep connecting and disconnect-
ing the device until you achieve unity gain.)
6) Solo switch up. Move onto next channel.
( 1 3)
8.4 Desk Normalization
All board settings should be set to the normal default condi-
tion before or after every session. Usually faders are set to zero
(minus infinity) EQs set flat, trimpots and channel aux sends
turned fully anticlockwise etc. Many controls have a natural
initial setting. For EQ cut and boost this is unity gain. However,
some settings, such as selecting pre or post for channel aux
sends, will depend on the operating environment (e.g. studio or
live), or on a particular engineer's preferred way of working.
9. Patchbay
A patchbay allows you to patch the audio signals of most com-
ponents in your studio from a central point and send them to
other units, which makes your entire cabling better structured
and is indispensable for professional work. If you want to use
your studio as effectively as possible then it is preferable to use
a complete patchbay wiring scheme. But even smaller studio
configurations will benefit from less sophisticated patchbay
solutions.
EURODESK SX3282 User Manual
until transient peaks are regularly