User manual SABINE FBX2020-PLUS

[. . . ] 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!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-Plus incorporates the latest in digital signal processing technology. It automatically senses feedback in a sound system and determines its pitch. [. . . ] Set the mixer's master volume controls to their lowest positions. Turn on the mixer, then the FBX, then any other accessories and finally the power amp. If you are using a graphic EQ, adjust only for the desired tonal qualities, but DO NOT NOTCH FOR FEEDBACK. Adjust the balance for each mixer channel, and set the sound system's master volume to minimum. Press RESET for 3 LED flashes to clear dynamic filters, and an additional 4 flashes to clear ALL filters set previously. (Factory default is 12 filters per channel - skip to #7 if default is OK for your application) You can limit the number of available FBX filters. When the LED corresponding to the desired number of filters lights, press the SET TOTAL NO. OPTIONAL: Set the number of Fixed filters (Factory default is 9 fixed and 3 dynamic per chanIMPORTANT TIP: nel - skip to #7 if default is OK for your application). octave filters in the same The filters LEDs will flash 4 times channel. Release the SET try making the first few filters FIXED button, and the LEDs will 1/5-octave and the remain- begin to light in sequence. Press the Bypass button to put the FBX in active mode for the channel you want to set (red LED off). Slowly raise the sound system's master volume for the channel being set until feedback occurs. The first FILTER LED will then blink to indicate a filter has been set. Repeat this procedure until all of the FIXED FILTERS and one of the DYNAMIC FILTERS are set. TURBO setup mode goes off automatically. 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. The signal is unaffected in BYPASS MODE even if the unit is turned off. Please note that if a combination of BALANCED and UNBALANCED inputs and outputs is used, the signal may be disconnected or attenuated in BYPASS MODE. Resetting the filters: You must reset the FBX if the microphones or speakers are moved significantly. To reset the unit, place the PA system's master volume to minimum and then press the reset button until all the FILTER LEDs stop flashing. Or you can reset only the Dynamic filters by pressing and releasing the reset button after the Dynamic filter LEDs stop flashing. This may be useful in certain situations, for example, after extensive wireless microphone use. FBX2020P-OpGuide-031104. pmd - hto 7 TURBO MODE SETUP The FBX2020-Plus incorporates TURBO mode setup, which is indicated by a flashing red "CLIP" LED. [. . . ] NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. [. . . ]