SABINE FBX SOLO 620 SL-620 Operating Manual page 12

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. It acts as an
automatic switch that opens a microphone only when someone is speaking directly into it. A
noise gate is especially useful in systems that have a number of open microphones, such as
courtrooms, conference rooms, or parliament buildings. Gating microphones greatly reduces
the number of possible feedback points in the room and allows for more system gain.
The level that turns the noise gate on and off is called the threshold. If the level coming into
LOCK FIXED button with no clip LEDs lighted turns off the noise gate. If no lights
flash on power-up, the noise gate is not engaged. When the SOLO's noise gate is
enabled, it will not become engaged until after you've set all fixed filters and one dynamic
filter (if the SOLO is configured for any).
USING SABINE'S OPTIONAL SOLO ACCESSORIES
1-U rack tray (model #SL6RACK): An optional 1-U rack tray holds up to six SOLOs. Mount
the SL-620s, SM-620s, or a combination of both side by side on the tray. Use only Sabine
supplied screws; use of any other screws may damage the SOLO and void the war-
ranty.
IMPORTANT OPERATING CONSIDERATIONS
MEMORY:
The FBX stores the positions and depths of the filters in nonvolatile internal memory when the
unit is turned off or during a power failure. The unit will return all filters to their previous
frequencies and depths when it is turned back on.
BYPASS MODE:
Placing the FBX-SOLO in bypass mode only shuts down the FBX function; the microphone
preamp still functions when the unit is in bypass mode. The SOLO will not pass signal if the
power is off in either active or bypass mode.
RESETTING THE FILTERS:
The user must reset the FBX if the microphones or speakers are moved significantly. To reset
the unit, press RESET until the LEDs stop flashing.
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the gate is greater than the threshold, the noise gate opens, and the mic is turned
on. If it is less than the threshold, the noise gate closes, and the mic is turned off.
You can adjust your SOLO to four different threshold levels (see diagram at left),
or turn it off. To select the threshold, power down the SOLO. Hold in the LOCK
FIXED button, and power up the SOLO. The clip level LEDs will light in se-
quence. Select the threshold level by pressing the LOCK FIXED button again
when the clip LED lights at the corresponding threshold level. The noise gate is
now enabled, indicated by a flashing level LED on power-up. Pressing the