How To Operate Your Fbx1220 / Fbx2420 - SABINE FBX1220 Operating Instructions Manual

4.2. How to operate your FBX1220 / FBX2420

Place equipment & make connections.
Follow these procedures to get maximum gain before feedback
a. Patch your FBX1220 or FBX2420 into system and make all connec-
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tions (refer to pages 2 and 3 for connection options).
b. Place speakers and microphones in performance positions.
c. Set Input and Output levels on FBX back panel (see Section 5.1.1.
for details). Start with all buttons pushed in.
d. If you are using a graphic EQ, adjust only for the desired tonal quali-
ties, but DO NOT NOTCH FOR FEEDBACK.
e. Adjust the level for each mixer channel, and set the sound system's
master volume to minimum.
Push SETUP button until all LEDs stop flashing and the
SETUP light flashes on its own.
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Dynamic filters. Do not use Setup mode during your performance.
Slowly raise the gain on the mixer or amp until the FBX
eliminates the first few feedback tones.
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DO NOT TALK INTO THE MICS. The FBX will quickly begin to find and remove
feedback. The first Fixed filter set will be heard as a quiet feedback chirp and
shown as an amber LED. As you slowly raise the gain, more feedback chirps
will be heard, and more amber LEDs will light.
a. If you are using stationary microphones:
Continue raising the gain until all filter LEDs cycle back and forth in
sequence. This is your indication that the FBX is exiting setup mode.
IMPORTANT: Reduce gain slightly. You are now in READY (perfor-
mance) mode, with the Fixed filters locked and the blue Ready light
on. Begin the show!
b. If you are using wireless microphones:
You can get more gain in a variety of locations. To do this, lower the system
gain after the first few filters are set, then move the microphone to another area
where it will be used and raise the gain slowly as before. Repeat this process
while you continue raising the gain until all filter LEDs cycle back and forth
in sequence. This is your indication that the FBX is exiting setup mode.
IMPORTANT: Reduce gain slightly. You are now in READY (perfor-
mance) mode, with the Fixed filters locked and the blue Ready light
on. Begin the show!
c.
You may quit Setup mode at any time prior to its automatic exit by simply
pressing the READY button (blue READY LED will flash). Press it again at
any time to lock the Fixed filters (blue READY LED stays on). Whether locked
or unlocked, pressing the READY button before Setup mode automatically
finishes will enable ready-to-operate status, but with fewer fixed FBX filters
in place. Dynamic FBX filters are still available to eliminate new feedback,
regardless of how or when SETUP mode is exited. Begin the show!
If you do not have time to use Setup Mode:
Push the READY button -- the blue LED flashes indicating the fixed filters are
unlocked. Begin your show, and once several fixed filters are set we recom-
4 mend you lock them by pushing ready again (blue LED stays lit). You won't
get all the potential benefit of increased gain before feedback, but you will get
automatic feedback control during your performance.
Setup mode clears all Fixed &
Power Tips
a. Set up one FBX channel at a
time.
b. DO NOT TALK INTO YOUR SYS-
TEM while in Setup mode.
c. See Section 5.2. FBX Filter Con-
trol for information on:
• Changing the number of Fixed
vs. Dynamic filters
• Selecting and mixing 1/10- &
1/5-octave filters
• Enabling and setting the Dy-
Front panel filter LEDs
lighting as gain is raised
and Fixed filters are set.
FILTER COLOR KEY
FBX Filters LEDs
Fixed, Locked RED Steady BLUE
Fixed, Unlocked AMBER Flashing
BLUE
Fixed & Dynamic Filters
See Section 4.1.3. for details on
the differences between Fixed and
Dynamic FBX filters, and Section
5.2.2. for instructions on changing
the balance of Fixed versus Dy-
namic filters.
LIT-FBX1220-1224-OP-EN-080208.pmd - ks
Ready LED
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