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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Grace 101, 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 Grace 101 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 Grace 101. 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 Grace 101 should contain:
- informations concerning technical data of Grace 101
- name of the manufacturer and a year of construction of the Grace 101 item
- rules of operation, control and maintenance of the Grace 101 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 Grace 101 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 Grace 101, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Grace 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 Grace 101.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Grace 101 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
model model 101 101 MICROPHONE PRE AMPLIFIER OWNERS MANUAL PO Box 204 Boulder, CO. 80306 voice: 303.443.7454 fax: 303.444.4634 email: info@gracedesign.com web: www.gracedesign.com Revision B April, 2001 © Copyright 2000 , Lunatec LLC OdB TRIM - 1OdB 1OdB GA IN 6OdB HI Z 48V HPF POWER[...]
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1 Thank you for purchasing the Model 101 microphone preamplifier. It is designed to be extremely reliable and easy to use . However, we ask that you take the time to familiarize yourself with some of the more important operation instructions in this manual to avoid most common user problems. Regardless of what audio sources you plan to record, the [...]
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2 MODEL 101 FE ATURES • Fully balanced transformerless mic input and high impedance instrument input • Balanced XLR and 1/4" TRS outputs • Ultra clean 48 Volt phantom power • 11 position precision silver contact rotary gain switch • High quality conductive plastic 10dB output attenuator • 75Hz 12dB/octave transitional Thompson-Butt[...]
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3 FRONT PA NEL CONTROLS GAIN CONTROL Each gain control has 11 positions and adjusts the voltage gain on the microphone input from 10dB to 60dB in 5dB steps. When using the instrument input, the gain range is –10d B to 40dB in 5dB steps. NOTE: If you ordered the high gain version of the 101 for use with ribbon microphones , the gain range of your [...]
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4 CONNECTING THE PRE AMPLIFIER AUDIO CONNECTIONS l Microphone input connections are made using the female XLR connector on the rear panel. This connector is wired with pin 2 positive, pin 3 negative and pin 1 ground . 48V phantom power, if used, is supplied on pins 2 and 3. l Instrument or line input connections are made using the ¼” TRS jack on[...]
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5 Cable Termination Diagrams 1 2 3 SHI ELD HOT GN D (OPE N) Figure 1 . XLR UNB ALANCED OUTPUT CABLE TERMINATION SHI ELD HOT GN D R IN G I S O PE N TIP R ING SLE E VE PRE AM P E ND Figure 2. TRS UNB ALANCED OUTPUT CABLE TERMINATION POWER SUPPLY CONNECTIONS A 2.1mm jack is used for the DC power input of the 101. The polarity of the jack is positive i[...]
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6 OPER ATION SETTING THE GAIN l Turn the gain control fully counter-clockwise, turn the trim control fully clockwise and check that the +48V phantom power is off. l Connect the microphone to the preamplifier and then turn on the phantom power switch on if required. l When sending a signal to a recorder that has fixed input levels, simply increase t[...]
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7 Model 101 S pecifications GAIN RANGE Mic input 5dB steps 10-60dB Mic input 5dB steps High gain version 20-70dB Hi-Z input 5dB steps -10-40dB Hi-Z input 5dB steps High gain ver z sion 0-50dB Output trim attenuator 0 to -10dB THD+N @20dB Gain +20dBu out <0.00085% @40dB Gain +20dBu out <0.0010% @60dB Gain +20dBu out <0.0050% IMD (SMPTE/DIN [...]
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8 20 75Hz HIGH PASS F IL TE R R ES PONSE d B u +1 0 - 1 - 2 - 3 50 100 200 500 1k 2k 5k 10k 20k d e g PHASE vs FREQUENCY +40 +30 +20 +10 0 - 10 - 40 - 20 - 30 20 50 100 200 1k 500 10k 2k 5k 20k Hz Phase response @10 dB gain. 5 0 Ohm sou rce, 100K Ohm load, HPF Of f FF T S PECTR UM ANALYSIS FFT @40dB gain, +20dBu out 5k 10k 25k 15k 20k Hz +20 0 - 25[...]