Operating instructions

ManualsBrandsSABINE ManualsPortable SpeakersFBX1200

FBX2020P-OpGuide-031104.pmd - hto

FBX and FBX Feedback Exterminator are registered trademarks of Sabine, Inc., and are the brand names of its line of automatic feedback controllers. Covered

by U.S. Patent No. 5,245,665, German Patent No. 69118486.0, U.K. Patent No. 0486679, Australian Patent No. 653,736, and Canadian Patent No. 2,066,624-2.

ClipGuard™ adaptive clip level control is covered under U.S. Patent No. 5821889. Other patents pending.

Operating

Guide

INSIDE THIS GUIDE:

About the FBX2020-Plus 1-2

FBX2020-Plus Controls 3

Applications 4-5

Understanding Fixed

& Dynamic Filters 6

Operating Instructions 6-8

Troubleshooting Tips 8

Product Specifications 9

Block Diagram 9

Cautions & Warranty 10

Compliance Information 11

Special features of the FBX2020-Plus:

• The FBX2020-Plus is a dual-channel unit with an improved algorithm that allows it to better distinguish the difference

between feedback and music.

• It has improved 20-bit digital resolution, providing superior dynamic range and signal-to-noise ratio.

• The FBX2020-Plus has 12 feedback filters per channel, giving the unit more feedback elimination power for the toughest

venues.

• The FBX2020-Plus's new ClipGuard® adaptive clip level control, with TURBO set-up mode, increases the effective dynamic

range by more than 10dB and makes set-up faster and easier.

• The FBX2020-Plus now includes a Dynamic Filter Reset option.

• The FBX2020-Plus incorporates an internal power supply.

• Standard FBX features such as lockable fixed filters and switchable 1/10- and 1/5-octave constant "Q" filters are also

included.

CONGRATULATIONS! You now have the state-of-the-art in feedback control. Your Sabine FBX2020-

Plus Dual Feedback

Exterminator, a dual-channel, 20-bit digital filtering device that gives you automatic real-time feedback control and increases

the clarity and volume of your system.

The FBX2020-P

lus incorporates the latest in digital signal processing technology. It automatically senses feedback in a sound

system and determines its pitch. It then places one of 12 constant "Q" micro-filters on the resonating frequency and eliminates

the feedback in typically less than one second.

QUICK-START OPERATION

For best results, read all operating instructions before using the FBX2020-

Plus

. If you're

already familiar with the FBX or just want a basic overview of FBX operation, this simple

quick-start procedure is for you. More detailed instructions are on page 7 inside this

operating guide.

1. Place the FBX between the output of your mixer and the input of your power amp.

2. With the mixer master volume down, put one FBX2020-Plus channel in active mode

(red BYPASS LED off), then slowly raise the mixer master volume to the point of

feedback.

3. Keep raising the master volume until all of your fixed filters and one dynamic filter are

set, then lower the volume slightly. The rest of the filters catch new feedback

frequencies throughout the program.

4. Repeat this procedure for the other FBX2020-Plus channel, & you're ready to go.

READ THE ENTIRE OPERATING GUIDE FOR COMPLETE INSTRUCTIONS.

Summary of content (12 pages)

PAGE 1
Operating Guide INSIDE THIS GUIDE: About the FBX2020-Plus FBX2020-Plus Controls Applications Understanding Fixed & Dynamic Filters Operating Instructions Troubleshooting Tips Product Specifications Block Diagram Cautions & Warranty Compliance Information 1-2 3 4-5 6 6-8 8 9 9 10 11 CONGRATULATIONS! You now have the state-of-the-art in feedback control.
PAGE 2
ABOUT THE FBX2020-Plus A DIRECT HIT ON FEEDBACK! The FBX targets feedback without taking a big chunk out of your sound. Tests prove that a single 1/3octave EQ slider pulled down 12 dB removes almost half the power going to the speakers over a two-octave range. And, as this illustration shows, you can't place a graphic EQ filter precisely on the ringing frequency. When you pull down multiple sliders in a normal setup (below), you end up with giant holes in your music.
PAGE 3
FBX2020-Plus CONTROLS FRONT PANEL ACTIVE/BYPASS SET TOTAL NO. FIFTH OCTAVE Bypass mode takes the unit out of the signal path so that it will have no effect on the program. In active mode, the unit controls feedback automatically. The red BYPASS LED lights when the unit is in bypass mode. To set the total number of filters, depress the button for 4 seconds and then release. The LEDs will begin to light in sequence.
PAGE 4
APPLICATIONS FBX SET-UP FOR MONITORS: Mix 1 CHA-OUT CHB-OUT CH A - IN AMP AMP CH B - IN Mix 2 MIXER FBX SET-UP FOR ENTIRE MIX: All other signal processing equipment Right Send CHA-OUT CHB-OUT Left Send MIXER 4 All other signal processing equipment CH A - IN AMP AMP CH B - IN
PAGE 5
FBX SET-UP FOR SINGLE INSERT POINT: MIXER Input Channel 2 CHB-OUT LOW Z CH B - IN CHA-OUT CH A - IN HIGH Z 1/4" TS plug (R) INSERT 1/4" TS plug (T) Insert Y-cord 1/4" TRS plug MIXER Input Channel 1 LOW Z HIGH Z INSERT ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ FBX SET-UP FOR INSERT SEND & RETURN: MIXER Input Channel 2 CHB-OUT LOW Z CH B - IN CHA-OUT CH A - IN HIGH Z I
PAGE 6
OPERATING INSTRUCTIONS ClipGuard® TURBO Mode Guide Before You Begin The FBX automatic feedback controller will improve any sound reinforcement system. By following these suggestions, you will be assured of the most benefit from your FBX enhanced sound system. The instructions presume that you are familiar with the fundamentals of sound reinforcement. Where the FBX fits in your sound system: Place the FBX anywhere in the sound system that a graphic equalizer might be used to control feedback.
PAGE 7
Reset Options The Reset button has two functions: You can reset all the FBX filters, or just the Dynamic Filters. Hold the reset button in and all the filter LEDs will begin flashing. To clear only the Dynamic filters, release the Reset button when the Dynamic filter LEDs go off (after three flashes). To clear all the filters, do not release the Reset button until all the filters LEDs go off. A full reset is recommended whenever you change speaker or microphone positions.
PAGE 8
TURBO MODE SETUP TROUBLESHOOTING TIPS The FBX2020-Plus incorporates TURBO mode setup, which is indicated by a flashing red “CLIP” LED. This lightning-quick setup feature cuts the time for FBX filter initialization to just a few seconds, and it reduces the volume level of the feedback during setup. The 2020Plus is set in TURBO mode at the factory and automatically engages every time you press RESET (resetting filters).
PAGE 9
FBX2020-Plus ENGINEERING SPECIFICATIONS FILTERS 12 independent digital notch filters per channel, controlled automatically from 40 Hz to 20 KHz. Filter width: user-controllable - either 1/10 or 1/5 octave, constant "Q" Resolution: 1/50 octave from 100 Hz to 20 KHz * Time required to find and eliminate feedback: 0.4 seconds, typical @ 1KHz Total number of combined filters active per channel: user selectable, from 1 to 12 Number of dynamic vs.
PAGE 10
Cautions & Warranty CAUTION CAUTION EXPOSURE TO EXTREMELY HIGH NOISE LEVELS MAY CAUSE A PERMANENT HEARING LOSS. INDIVIDUALS VARY CONSIDERABLY IN SUSCEPTIBILITY TO NOISE INDUCED HEARING LOSS, BUT NEARLY EVERYONE WILL LOSE SOME HEARING IF EXPOSED TO SUFFICIENTLY INTENSE NOISE FOR A SUFFICIENT TIME. THE U.S.
PAGE 11
Warning! This equipment must be earthed. Caution! Risk of electric shock. Do not open. Caution! Shock hazard. Do not remove covers. No user serviceable parts inside. Refer servicing to qualified service personnel. Warning! To reduce the risk of fire or electric shock, do not expose this product to rain or moisture. Warning! The FBX2020-Plus is designed to operate from standard AC power. Please be sure the power in your area is compatible with the power requirements marked on the rear of the unit.
PAGE 12
Register your FBX2020-Plus online at Sabine.com MADE IN USA Manufactured by: Sabine, Inc. 13301 NW US Highway 441 Alachua, Florida 32615-8544 USA Phone: (386) 418-2000 • Fax: (386) 418-2001 www.Sabine.