Behringer FBQ3102 [9/14] Installation
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Behringer FBQ3102 [9/14] Installation

Behringer FBQ3102 [9/14] Installation
9 ULTRAGRAPH PRO FBQ6200/FBQ3102/FBQ1502 User Manual
3.2.1 Priming a monitor system
Priming describes the process of detecting and supressing feedback frequencies.
After placing and leveling your mics and monitors (incl. power amps), you should
crank up the aux send controls of your mixer.
Now, activate the FBQ feedback detection system by pressing the FBQ switch (3).
The slide control LEDs (9) will turn dark. Then, increase the amplication on your
mixer by using the aux send master control until you notice feedback starting to
occur. Feedback frequencies will now be easily visible through intensive lighting
of the relevant LEDs.
Pull down the slide controls whose LEDs are lit until the feedback subsides.
Repeat this procedure to weed out other possible feedback frequencies.
Afterhaving adjusted all critical frequencies, when you crank up the aux send
master control, you will be able to hear only the initial multi-frequency feedback.
Your monitors have reached their maximum volume.
Leave all other faders in the middle position as long as no need for frequency
correction occurs (e.g. measuring with a real-time analyzer). Set the desired
stage volume, and you will have a tremendous amount of headroom available
toyou, without creating audible feedback.
3.3 Using the ULTRAGRAPH PRO in the studio
Additional applications await the ULTRAGRAPH PRO models in the studio.
Nolimits stand in the way of your imagination. Here are just a few examples
ofpossible uses:
EQing your studio monitors:
You can conduct a graphic equalization of your monitors. Besides, you can supress
narrow-band room resonance. An analyzer, for example the analyzer integrated
into our digital equalizer ULTRACURVE PRO DEQ2496, can help you when you are
looking for room resonance and a linear frequency response.
General sound processing:
Equalizers can be used to process both single-channel and master signals.
Toprocess single-channel signals, you should connect the ULTRAGRAPHPRO
via the channel inserts on your mixer. To control several signals with your
ULTRAGRAPH PRO, use either subgroup or main mix inserts. Nowadays,
theoverall sound of a mix is often “tweaked” with equalizers. Often, a mix is not
uniform, that is, frequency ranges are either too prominent or not prominent at
all. A graphic equalizer lets you nd a tting ratio between the intensity of these
various frequency ranges in order to achieve a homegenous sound.
3.4 Special sound eects
In recording studios as well as stage or radio plays, the ULTRAGRAPH PRO will be
your valuable sound tool for modifying the sound of voices (e.g. telephone voice)
or to lter instruments so that they t in an existing mix.
The tables on the separate add-on sheet give you an idea of specic frequencies
and their acoustic signicance, and suggest some possible uses for your
ULTRAGRAPH PRO.
4. Installation
4.1 Rack mounting
The FBQ1502 requires one height unit (1 HU) for mounting in a 19" rack,
theFBQ3102 two height units, and the FBQ6200 three height units. Please allow
at least an additional 4" of space for the connectors on the back panel.
Be sure that there is enough space around the unit for cooling and please do
not place your ULTRAGRAPHPRO on high-temperature devices such as power
ampliers etc. to avoid overheating.
For rack mounting, please use M6 metal nuts and bolts.
4.2 Audio connections
You will need many dierent cables for the various applications. The following
illustrations show how these cables should be laid out. Please use exclusively
high-grade cabels.
The ULTRAGRAPH PRO is installed with electronically servo-balanced inputs and
outputs to avoid hum noise problems.
You can, of course, also connect unbalanced devices to the balanced inputs/
outputs. Either use mono plugs, or connect the ring and sleeve of stereo plugs
(bridge pin 1 and pin 3 when using XLR connectors).
◊ Please ensure that only qualified personnel install and operate the
ULTRAGRAPH PRO. During installation and operation the user must
have sufficient electrical contact to earth. Electrostatic charges might
affect the operation of the unit.
output
For unbalanced use, pin 1 and pin 3
have to be bridged
1 = ground/shield
2 = hot (+ve)
3 = cold (-ve)
input
12
3
1
2
3
Balanced use with XLR connectors
Fig. 4.1: XLR connectors

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