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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Extron electronic RAC 104, 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.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Extron electronic RAC 104 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 Extron electronic RAC 104. 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 Extron electronic RAC 104 should contain:
- informations concerning technical data of Extron electronic RAC 104
- name of the manufacturer and a year of construction of the Extron electronic RAC 104 item
- rules of operation, control and maintenance of the Extron electronic RAC 104 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 Extron electronic RAC 104 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 Extron electronic RAC 104, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Extron electronic 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 Extron electronic RAC 104.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Extron electronic RAC 104 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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Page 1
User ’ s Manual Remote V olume and T one Contr oller 68-782-01 Rev. C 12 08 RAC 104[...]
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Page 2
Precautions This symbol is intended to alert the user of important operating and maintenance (servicing) instructions in the literature provided with the equipment. This symbol is intended to alert the user of the presence of uninsulated dangerous voltage within the product's enclosure that may present a risk of electric shock. Caution Read In[...]
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Page 3
RAC 104 • Introduction FCC Class A Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generate[...]
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Page 4
ii RAC 104 • Table of Contents T able of Contents, cont’d[...]
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Page 5
RAC 104 • Quick Start Guide V O L U M E & T O N E C O N T R O L L E R 1 2 3 4 B a s s T r e b l e V o l . A D J U S T M E N T S A U D I O C O N T R O L S A B QS-1 T o install and set up the RAC 104 r emote volume and tone controller , follow these steps and see the appropriate section of this manual for details: Step 1 T urn all of the equipm[...]
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Page 6
RAC 104 • Quick Start Guide Quick Start Guide — RAC 104, cont’d QS-2 Step 4 If the RAC 104 is to be connected to a computer or host controller for remote contr ol, connect the host’s RS-232 cable to the RAC 104’ s 3-pole captive screw RS-232 connector . W ir e the connector as shown below . See chapter 3 for more information on r emote co[...]
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Page 7
TOC-i RAC 104 • Table of Contents Chapter 1 • Introduction .......................................................... 1- 1 About the RAC 104 ................................................................ 1- 2 Features ...................................................................................... 1- 2 Chapter 2 • Installation and Ope[...]
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Page 8
vi RAC 104 • Table of Contents T able of Contents, cont’d All trademarks mentioned in this manual are the properties of their respective owners. 68-782-01 Rev. C 12 08 TOC-ii Appendix A • Specifications , Part Numbers, and Accessories .............................................................................. A-1 Specifications ...........[...]
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RAC 104 1 Chapter One Intr oduction About the RAC 104 Features[...]
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Page 10
RAC 104 • Introduction Introduction About the RAC 104 The Extron RAC 104 is a high-performance, four-channel remote audio controller that adjusts volume and tone for stereo or mono audio signals. Adjustments are made via the RAC 104’s front panel controls or through a device connected to the unit’s RS-232 connector . The four channels on the [...]
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Page 11
RAC 104 • Introduction 1-3 Consumer and professional audio compatibility — Input and output line level can be set to consumer (-10 dBV) or professional (+4 dBu). Rack, furniture, and projector mountability — The RAC 104 can be mounted on an optional V ersaT ools or Universal rack shelf. Alternatively , it can be mounted under a desk, podium, [...]
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RAC 104 • Introduction Introduction, cont’d 1-4[...]
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RAC 104 2 Chapter T wo Installation and Operation Mounting the RAC 104 Rear Panel Features and Cabling Front Panel Controls[...]
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Page 14
RAC 104 • Installation and Operation Installation and Operation Mounting the RAC 104 The RAC 104 can be set on a table or mounted on a rack shelf, under a desk or tabletop, or on a projector mount. UL rack mounting guidelines The following Underwriters Laboratories (UL) guidelines pertain to the safe installation of the RAC 104 in a rack. 1. Elev[...]
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Page 15
RAC 104 • Installation and Operation 2-3 T abletop use Four self-adhesive rubber feet are included with the RAC 104. For tabletop use, attach one foot at each corner of the bottom side of the unit and place the unit in the desired location. Rack mounting For optional rack mounting, do not install the rubber feet. Mount the RAC 104 on an RSF 123 V[...]
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Page 16
RAC 104 • Installation and Operation Installation and Operation, cont’d Furniture mounting Furniture mount the RAC 104 using the optional MBU 123 mounting kit (Extron part # 70-212-01 ) as follows: 1 . Remove rubber feet if they were previously installed on the bottom of the RAC 104. 2 . Attach the furnitur e mounting brackets to the RAC 104 wi[...]
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Page 17
RAC 104 • Installation and Operation 2-5 Projector mounting Projector mount the RAC 104 using the optional PMK 100 pole mount kit (part # 70-217-01 ) as follows: 1 . Remove rubber feet if they were previously installed on the bottom of the RAC 104. 2 . Attach the pr ojector mounting brackets to the RAC 104 with the machine screws pr ovided. 3 . S[...]
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Page 18
RAC 104 • Installation and Operation Installation and Operation, cont’d 2-6 Rear Panel Features and Cabling RA C 104 ON INPUTS OUTPUTS LINE LEVEL IN A B A B OUT +4 dBu -10 dBV Tx Rx RS-232 PO WER 12V 0.2A MAX A 12 B 34 A 12 B 34 4 1 3 5 2 1 Input connectors — Plug the audio input devices into these two 5-pole captive screw connectors. One ste[...]
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Page 19
RAC 104 • Installation and Operation 2-7 3 RS-232 connector — Plug an optional RS-232 device into this 3-pole captive screw connector . W ire the connector as shown below . T ransmit (Tx) Receive (Rx) Ground (Gnd, ) RS-232 Tx Rx Pin RS-232 function Description 1 Tx T ransmit data 2 Rx Receive data 3 Gnd Signal ground 4 Line level selector DIP s[...]
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Page 20
RAC 104 • Installation and Operation Installation and Operation, cont’d 2-8 Y our RAC 104 may have shipped with a blue captive screw connector . This blue connector can be plugged into either a blue or an orange power receptacle. T he ideal length of exposed (stripped) copper wire for the blue connector is 3/16" (5 mm). The blue connector [...]
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Page 21
RAC 104 • Installation and Operation Front Panel Controls V OLUME & T ONE CONTROLLER 1 2 3 4 BASS TREBLE VO L ADJUSTMENTS A UDIO CONTROLS A B RAC 104 2 3 1 4 1 Power LED — Lights to indicate that the RAC 104 is on. 2 Channel selector buttons and LEDs — The RAC 104 has two channel selector buttons, one for channel group A (channels 1 and 2[...]
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RAC 104 • Installation and Operation Installation and Operation, cont’d 2-10 3 Adjustment selector button and LEDs — Press and release this button to select volume, bass, or treble adjustment. When an adjustment is selected, the corresponding LED lights. If after 10 seconds you do not make any other adjustments or selections on the front pane[...]
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Page 23
RAC 104 • Installation and Operation For example, if the treble on channel 1 is set to 6 and the treble on channel 2 is set to 10, the unit will change channel 2’s treble setting to 6 when the user ties them together . Channel 1 Channel 2 Treble before tie: 6 10 Treble after tie: 6 6 V olume, bass, tr eble, and mute adjustments can now be made [...]
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RAC 104 • Installation and Operation Installation and Operation, cont’d 2-12[...]
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Page 25
RAC 104 3 Chapter Thr ee Remote Control Simple Instruction Set Windows-Based Program Control Front Panel Security Lock Out (Executive Modes) Presets Mute[...]
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Page 26
Remote Control RAC 104 • Remote Control The RAC 104 can be controlled remotely via the RS-232 connector using the Extron Simple Instruction Set (SIS) or the Extron W indows-based control program. The RS-232 connector on the RAC 104 is a 3-pole captive screw connector , with one pole for transmitting data, one for receiving data, and one for the g[...]
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Page 27
RAC 104 • Remote Control Controller error responses When the RAC 104 receives an SIS command and determines that it is valid, it performs the command and sends a response to the host device. If the controller is unable to perform the command because the command is invalid or contains invalid parameters, the contoller returns an err or response to[...]
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Page 28
Remote Control, cont’d RAC 104 • Remote Control 3 = group B, channel 3 4 = group B, channel 4 X3 = 0 or 1 0 = off 1 = on X4 = 0 through 14, bass adjustment range (+/-14 dB; 2 dB increment/decrement, bass in dB = [bass number minus 7] times 2; default = 7 [0 dB]). X5 = 0 through 14, treble adjustment range (+/-14 dB; 2 dB increment/decrement, tr[...]
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Page 29
RAC 104 • Remote Control 3-5 Command/response table for SIS commands Command ASCII Command Response Additional description (host to RAC 104) (RAC 104 to host) Audio input gain/attenuation Set gain (+dB) X2 * X1 1 G Chn X2 Gain X1 0 Set gain for channel X2 to X1 0 dB. Example: 3*8G Chn3 Gain8 Set gain for channel 3 to 8 dB. Set attenuation (-dB) X[...]
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Page 30
Remote Control, cont’d RAC 104 • Remote Control 3-6 Each of the four channels has three pr esets. The V iew Preset command response tells the user which presets for a particular channel have been used to save settings and which are empty . The r esponse consists of a sequence of three digits. The first, second, and third digits indicate the sta[...]
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Page 31
RAC 104 • Remote Control 3-7 Command ASCII Command Response Additional description (host to RAC 104) (RAC 104 to host) View Pr eset Settings V iew input gain X2 * X9 *5# X1 0 V iew output volume X2 * X9 *6# X1 V iew bass setting X2 * X9 *7# X4 V iew treble setting X2 * X9 *8# X5 System reset Reset to factory defaults Esc ZXXX Zpx Default settings[...]
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Page 32
Remote Control, cont’d RAC 104 • Remote Control 3-8 Commands can be made back-to-back with no spaces. Example 1*1!02!03*03!.. The RAC 104 supports the 2-digit numeric format (01*02). Command ASCII Command Response Additional description (host to RAC 104) (RAC 104 to host) Front panel lock out (Executive modes) Set executive mode X6 X/x Exe X6 0[...]
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Page 33
RAC 104 • Remote Control 3-9 Command ASCII Command Response Additional description (host to RAC 104) (RAC 104 to host) V olume, Bass, and T reble Range Limit Settings Set volume lower limit X2 * X1 * 21 # Vll X2 * X1 Set volume lower limit for channel X2 to X1 . Set volume upper limit X2 * X1 * 22 # V ul X2 * X1 Set volume upper limit for channel[...]
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Page 34
Remote Control, cont’d RAC 104 • Remote Control 3-10 Windows ® -Based Program Control The W indows-based Extron Audio Pr oducts Control Program is compatible with W indows 2000 and W indows XP and provides remote control of the volume, gain, and tone adjustment, and other RAC 104 features. Updates to this program can be downloaded from the Ext[...]
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Page 35
RAC 104 • Remote Control Input/Output Level fields The Input Level and Output Level fields display the current settings for the line level selector DIP switches. See the chapter 2 section, “Rear Panel Features and Cabling”, for more information. Input/Output Level fields Preset Preview button T o view a pr eset before recalling it, select a c[...]
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Page 36
Remote Control, cont’d RAC 104 • Remote Control 3-12 Using the help system For information about program features, you can access the help program in any of the following ways: • From the Extr on Electronics program gr oup, double-click the Audio Products Help icon. • From within the Audio Products Contr ol program, click Help on the task b[...]
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Page 37
RAC 104 • Remote Control Front Panel Security Lockout (Executive Modes) T o pr event accidental changes to the controller settings, the front panel contr ols can be locked using one of two executive modes. The user turns the executive modes on and off using either the SIS or the W indows-based control pr ogram via the RS-232 connector . While an [...]
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Page 38
Remote Control, cont’d RAC 104 • Remote Control 3-14[...]
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Page 39
RAC 104 A Appendix A Specifications, Part Numbers, and Accessories Specifications Included Parts Accessories[...]
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Page 40
RAC 104 • Specifications, Part Numbers, and Accessories Specifications, Part Numbers, and Accessories A-2 Specifications Audio Ga in ................................................ Unbalanced output: -6 dB; balanced output: 0 dB when input gain is set to 0 dB, output volume is at 100, and the input and output are set to the same level via the Li[...]
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Page 41
RAC 104 • Specifications, Part Numbers, and Accessories A-3 Input gain adjustment ................. –12 dB to +12 dB 0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu. Audio output Number/signal type ................... 4 channels, which can be mono or tied into stereo pairs, balanced/unbalanced Connectors ................................... (2) [...]
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RAC 104 • Specifications, Part Numbers, and Accessories Specifications, Part Numbers, Accessories, cont’d Enclosure dimensions ................. 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide) 4.3 cm H x 10.9 cm W x 7.6 cm D (Depth excludes connectors and knob.) Product weight ............................. 0.5 lbs (0.3 kg) [...]
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Ext r on’ s W a rr ant y E x t ro n E lec t ro ni cs warra nt s t h i s prod u c t a g a in s t defec t s in ma t er i als a n d workma n sh i p for a per i od of t hree years fr om t he da t e of p u rchase. I n t he eve nt of malf un c ti o n d u r ing t he warra nt y per i od a tt r i b ut able d i rec t ly t o fa u l t y workma n sh i p a n d[...]
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© 2008 Extron Electronics. All rights reserved. Extro n U SA - We st Headquarters +800.633 .9876 Inside USA / Canada Only + 1. 714.491 .1 500 + 1. 714.491 .1 517 FA X Extro n U SA - Ea st +800.6 33.987 6 Inside USA / Canada Only +1. 9 19 . 8 6 3 . 17 9 4 +1. 9 19 . 8 6 3 . 17 9 7 FAX Extro n Europe +800.3987. 6673 Inside Europe Only +31 .33.45 3.4[...]