Audio Connections; Specifications - Behringer Ultrapatch Pro PX3000 User Manual

into the send-return loop by connecting their inputs & outputs to
jacks A & B (pos. ).
The main left & right outputs of the mixer are connected, in this
example configuration, to a mini-disc recorder. However, they
can also be connected in parallel to another recorder (pos.
The mini-disc recorder can record other sources when they are
connected to jack B of channels 15 and 16 (pos.
2.3 THRU mode
This mode is for sound modules or playback devices (e.g. CD
players) that only have output signals. You can save space by
routing the left and right outputs to one channel (jacks A & B) of
the patchbay. A more typical setup is to connect the left and right
outputs to adjacent channels (jacks A & A) and then connect
another device to jacks B & B of the same channels. This
configuration also allows you to position the inputs and outputs
of effects devices, compressors, equalizers, etc. directly above
each other.
In the example configuration above, the outputs of the playback
devices (CD and mini-disc) plus the four individual outputs of a
sampler are connected to channels 17 to 20, while channels
21 to 24 are used for the inputs & outputs of a compressor and
an EQ, which are usually connected to the inserts of a mixer.
3. WIRING & GROUNDING
Looming the wiring is an art itself and it is worth the time to get
it right. First, it is important to avoid ground loops. Don’t remove
the ground connection of your mains cable plug to reduce
50/60 Hz mains hum. Instead, systematically disconnect the signal
shields in the signal chain until the hum ceases.
It is typically best to connect only one end of each shield to a
central point and to connect this single point to ground. Then all
equipment will be grounded via a single path (more than one
path can lead to ground loops which can cause hum).
Some equipment has isolated grounding for the signals and
the mains. In this case, at least one screen should ground the
equipment.
Please assure that the patchbay is installed so that it does not
disturb the studio’s grounding scheme. Always use patch leads
that are as short as possible and have the shield connected at
both ends.
After eliminating the mains hum from the system, make your
cable looms from the patchbays outwards and use cable ties,
flexible sheaths, multicores, etc. to keep the back of your racks
orderly. It is also wise to keep low level/line level signal cables
away from high voltage/mains cables.
4. CAUTIONS
Avoid routing digital signals near a patchbay because the pulse
signal used for the transmission of digital signals causes heavy
interference in analog signals. Do not use standard patchbays
for digital signals. Use the ULTRAMATCH PRO SRC2496—it is
specifically designed for routing and matching digital signals.
Microphone inputs are for very low level signals and should
never be routed via a patchbay. Plus, the +48 Volt phantom power
from the mic input could damage other equipment. It is best to
plug mics directly into the mixer or via a wall box using good
quality balanced multi-core cables.
ULTRAPATCH PRO PX3000

5. AUDIO CONNECTIONS

).
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Fig. 5.1: 1/4" TRS connector
Fig. 5.2: 1/4" TS connector

6. SPECIFICATIONS

Connectors
Dimensions (H x W x D)
Weight
BEHRINGER is constantly striving to maintain the highest professional
standards. As a result of these efforts, modifications may be made from
time to time to existing products without prior notice. Specifications and
appearance may differ from those listed or illustrated.
6. SPECIFICATIONS
1/4" TRS, balanced
approx. 1 3/4" x 19" x 3 2/3"
(44.5 mm x 482.6 mm x 93 mm)
approx. 4 lbs (1.8 kg)
3