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The rules should oblige the seller to give the purchaser an operating instrucion of Shure DFR22, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Shure DFR22 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of Shure DFR22. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Shure DFR22 should contain:
- informations concerning technical data of Shure DFR22
- name of the manufacturer and a year of construction of the Shure DFR22 item
- rules of operation, control and maintenance of the Shure DFR22 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Shure DFR22 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Shure DFR22, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Shure service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Shure DFR22.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Shure DFR22 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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DFR22 Audio Processor with Feedback Reduction Model DFR22 Installation Guide 27 B8 81 3 ( Rev. ) 200 Shure Incorporated Printed in U.S.A.[...]
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! IMPORT ANT SAFETY INSTRUCTIONS ! 1. READ these in structions. 2. KEEP the se instruct io ns. 3. HEED all warn ings. 4. FOLLOW al l instruct ions. 5. DO NOT us e this appara tus near wa ter . 6. CLEAN ONL Y with dry cloth. 7. DO NOT bl ock any venti lation open ings. Install in accordance w ith the manu- facturer's instru ctions. 8. DO NOT in[...]
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ENGLISH 1 DESCRIPTION Th e DFR22 Audio Processor with Feedback Reduction is a 2–input, 2–output digital audio processor . It is designed to equalize so und system response, provide dynamics processing and alignment delay , and automatically detect and control acoustic feedback. A built-in 2 X 2 matri x mixer allows either or both inputs to be r[...]
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ENGLISH 2 OVERVIEW Front Panel DFR22 FRONT P ANEL Figure 1 1. INPUT/OUTPUT Level Meters: – CLIP . Illuminates at 3 dB below clipping level . –0 V U . +4 dBu, –10 dBV ; software selectable . 0 dB is equal to +4 dBu by default. If the input or output sensitivity is changed to –10 dBV using the DFR22 software, 0 dB equals –10 dBV . – –20[...]
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ENGLISH 3 DEF AUL T PRESETS The DFR22 comes with three factory-configured presets. Although a computer is required to configure the DFR22’s equalizers, dy- namics processors, delays, and crossover , you can use the DFR22 “out of the box” as an automatic feedback reducer , without connect- ing it to a computer . Preset 1: Provides two independ[...]
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ENGLISH 4 DFR22 Theory Feedback Reduction No sound system (microphones + mixing/signal processing + power amplifiers/loudspeakers + room acoustics) has an absolutely flat fre- quency response. When the level of a sound system is increased, the frequencies at which peaks occur will be the first to exceed the feed- back threshold. The DFR22 attenuate[...]
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ENGLISH 5 POWER AND INITIALIZA TION Power Mains Connections Us e the supplied power cable to connect the DFR22 Audio Proces- sor to an active 100–240 V ac power source, as shown in Figure 6. The Power LED on the front panel will glow green when power is applied. NOTE: The DFR22 Audio Processor is designed to operate contin- uously . Therefore, th[...]
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ENGLISH 6 12 dB and 18 dB Output Pads Each DF R2 2 output has a 12 dB pad and an 18 dB pad that can be engaged through the software interface. Use these pads when con- necting the DFR22 to lower-level inputs. They cannot be used to prevent clipping at the output stage of the DFR22 NOTE: The Output meters indicate the signal level present at the dig[...]
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ENGLISH 7 DIP Switch Settings for Networked Devices Assign each Shure Link device a unique Device ID Number , using DIP Switches 1–4, as shown in Figure 13. Refer to T able 2 for De- vice ID settings. IMPORT ANT : Each Shure Link device MUST have a unique Device ID number . DIP SWITCH SETTINGS FOR NETWORKED DEVICES Figure 13 T able 2. DEVICE ID S[...]
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ENGLISH 8 Mute Control Connections For mute control, use either a latching switch or a momentary switch. The total resistance of the cable run from the switch to the DFR22 should be less than 100 ohms. Figure 15 shows an example of how to connect either a latching switch or a momentary switch to the Control Input pins to mute an input or an output.[...]
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ENGLISH 9 SPECIFICA TIONS Frequency Response 20 Hz to 20 kHz ± 1 dB Dynamic Range 1 10 dB minimum, A-weighted, 20 Hz to 20 kHz Sampling Rate 48 kHz Digital-to-Analog, Analog-to-Digital Conversion 24 bit Impedance Input: 10 k Ω Output: 120 Ω Input Clipping Level +24 dBu minimum Output Clipping Level +24 dBu +12 dBu (with 12 dB pad) +6 dBu (with[...]
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ENGLISH 10 Information to User Changes or modifications not expressly approved by Shure Incorporated could void your authority to operate this equipment. 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 Rule s. These limits are designed to provide reasonable protection a[...]
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SHURE Incorporated http://www.shure.com United States, Canada, Latin America, Caribbean: 5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A. Phone: 847-600-2000 U.S. Fax: 847- 600- 121 2 Intl Fax: 847-600-6446 Europe, Middle East, Africa: Shure Europe GmbH, Phone: 49-7131-721 40 Fax: 49 -7131-721414 Asia, Pacific: Shure Asia Limited, Phone: 852-289 [...]