SABINE FBX-SOLO SL820 - Manual (Page 16)

16
HOW TO USE THE LOCK FIXED FEATURE
In certain situations the FBX may mistake music for
feedback and drive the fixed filters deeper than
necessary, like in a church with a pipe organ or during
a performance with a great deal of intentional sus-
tained electric guitar feedback. You may prevent the
fixed filters from deepening beyond their initial depth
by pressing the Lock Fixed button on the front panel
AFTER setting the fixed filters as described previ-
ously. The Lock Fixed LED will light to indicate that
the FBX is in Lock Fixed mode. The fixed filters will
stay locked until you press the Lock Fixed button
again. The dynamic filters are not affected. In almost
every situation, it is best to lock the fixed filters
right after the initial setup.
LIMITING TOTAL NUMBER OF ACTIVE FILTERS
You may choose to limit the total number of active
filters for each application by using the Lock Fixed
button. For example, if you wish to use only three
fixed and one dynamic filter, set the FBX so there are
seven fixed and one dynamic filter. Then during the
setup procedure, simply press the Lock Fixed button
after setting the first three fixed filters. The remaining
four fixed filters will be locked in their zero position.
SELECTING FILTER WIDTH
If the SOLO is to be used for a music application, 1/10-
octave filters are most effective. However, in spoken
word applications, such as lectures or teleconferenc-
ing, the wider 1/5-octave filters are recommended.
Select the filter width using the switch on the SOLO
back panel. The change takes effect only on power-
up. Selecting a new width has no effect unless you
power down and then power up again.
ENGAGING THE NOISE GATE
One outstanding feature of your FBX-SOLO is a user-
selectable noise gate. A noise gate is especially
useful in systems that have a number of open micro-
phones, such as courtrooms, conference rooms, or
parliament buildings. Gating microphones greatly re-
duces the number of possible feedback points in the
room and allows for more system gain.
The level at which the noise gate turns on and off is
called the threshold. If the level coming into the gate
is greater than the threshold, the noise gate opens,