User Manual

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(an AD558). The micro-controller sequentially applies the levels for each output to the
Digital to Analog chip (abbreviated D/A) while switching the output of the D/A to the 24
output buffers. The switching circuit (three 4051 chips) allow one D/A to service all
outputs with less than 1/250 second delay between the time a DMX level changes and
the analog output is updated. Capacitors hold the 0 - 10 volt level while the other
outputs are being updated.
Diodes on the output allow multiple consoles to control the same dimmers by what is
commonly known as Pile-On of the signal.
We cannot answer all the questions everyone might have about our products here. If
you have any questions, please call. We like to talk with our customers.
ABOUT THE COMPANY
Doug Fleenor Design is a semi-custom design and manufacturing company. Our
current standard products include converters for many lighting control protocols, Optical
Isolation products for DMX512, AMX192, and other digital protocols, and a Digital
Multiplex Combine Unit (for combining Digital Multiplex signals in a pile-on, route, or
patch operation). All these standard products can be customized for particular needs.
Doug Fleenor, Principle Engineer, has been designing for the entertainment industry
since 1979. He spent the years from 1984 through 1990 as Teatronics' Chief Engineer.
During this time his work on advancing multiplex control consoles, dimmers and
systems earned him the nick-name "Doctor Mux". Doug Fleenor Design continues to
provide solutions to multiplex control problems as well as designing custom and semi-
custom control and dimming systems.
WARRANTY
Products manufactured by Doug Fleenor Design carry a five year warranty. If the
product breaks due to a manufacturing defect, within five years of manufacture, Doug
Fleenor Design will repair it. It is the customer's responsibility to return the product to
Doug Fleenor Design (at the customer's expense). Doug Fleenor Design will repair the
unit and return it to the customer (at Doug Fleenor Design's expense). If a trip is
necessary to the customer's site to solve a problem, the expenses of the trip must be
paid by the customer.
If your unit is out of warranty, please call us anyway. We try to be fair on all repairs. If
the failure was our fault, we will usually repair it at no charge regardless of the time
period! We want you to be happy with your purchase.