GraceメーカーM201の使用説明書/サービス説明書
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owner’s manual all contents ©2007 Grac e Design/ Lunatec LL C m 20 1 manual Rev C microphone preamplifier optional A/D converter module.
grace design m 201 owner’ s manual 2 Welcome Thank you for purchasing the Grace Design m201 microphone preamplifier . W ith the combination of unmatched sonic per formance, powerful featur es, and solid reliability , the m201 is a powerful rec ording tool designed to help you make the best recordings of your career .
grace design m 201 owner’ s manual 3 Important Safety Information GENERAL •Indoor use only •Ordinary P rotection: This equipment should not be exposed to dripping or splasing . •A void placing objects filled with liquids, such as vases or glasses, on this equipment.
M+S WIDTH 1 0 0m 70 m 30s 30m 70s 50m 50s GRACE DESIGN USA m 201 microphone preamplifier HI-Z 1 48V HI -Z 130 V rib bon ( +10d B ) 20 30 40 50 60 INPUT MODE + 48V - 20dB HI-Z 2 48V HI -Z 130 V rib bon.
120Vac P U S H P U S H P U S H 1 3 2 4 P U S H 1 3 2 4 P U S H P U S H WORD/LOOP CLOCK S/PDIF LINE IN TOSLINK AES3 OUT OUT IN R IGHT L EFT M+S O UT 130 V MIC IN 1 2 MIC IN OU T OU T MIC IN OU T OU T G.
grace design m 201 owner’ s manual 6 Audio Connections Microphone input connec tions are made via female XLR connectors with pin 2 posi- tive , pin 3 negativ e and pin 1 ground . 48V phantom power is supplied on pins 2 and 3. Output connections are made via male XLR connec tors with pin 2 positive, pin 3 negative and pin 1 ground.
grace design m 201 owner’ s manual 7 showing . D o not tr y to rotate the cam while it is in the power input module. Replace the fuses with the proper value selec ted from <figure 2> below . B e sure to use a time delay fuse with a 250V rating .
grace design m 201 owner’ s manual 8 ribbon This setting puts the m201 into ‘ribbon mic mode’ , which is described in detail below . Use this input for ribbon microphones or any application where an additional 10dB of gain may be required.
< > 14 16 18 20 0 0.1 0.2 0.3 0.4 -0.3 -0.2 -0.1 -0.4 LEVEL HEADROOM ( dB ) 1 2 -60 -50 -40 -32 -28 -24 -20 -18 -16 -14 -12 -10 -8 -6 -5 -4 -3 -2 -1 0 CAL INT WORD LOOP s LOCK OFF PRO 2WIRE 44 4.
grace design m 201 owner’ s manual 10 A FS SELECT this switch is used to toggle through the a vailable ADC sampling rates B CL OCK SOURCE this switch is used to select the ADC clock source C ADC MOD.
grace design m 201 owner’ s manual 11 all the av ailable sampling rates. Simply push the button to select the sampling rate you require. The selected rate will be illuminated green below . Selecting “OFF” puts the A/D con ver ter circuitr y in low power standby mode with all oscillators off.
grace design m 201 owner’ s manual 12 The front panel inter face features a calibration mode that allows precise adjustment of the A/D sensitivity . T o recalibrate one or both of the input sensitivity configurations , simply do the following: 1 ) Disconnec t AC power from the m201.
<figure 3 - A/D sensitivity trim pot lo cations> 8 4 C -15V A U9 C40 P4 C42 7 4 C 5 4 C 7 3 R 2 4 R C46 +6.
grace design m 201 owner’ s manual 14 Maintenance The model m201 was designed to be maintenance free for many years. I t is highly unlikely that your unit will require ser vice. However , there are two adjustments that may need to be made from time to time.
grace design m 201 owner’ s manual 15 The input amplifiers in the m201 are ultra-precision laser trimmed devices which hav e a very low input offset. However , even the smallest differ ential offset at the input can result in an audible “ click ” when the gain control is turned.
grace design m 201 owner’ s manual 16 <figure 4 - offset test point and peak LED adjust trim pots> .
grace design m 201 owner’ s manual 17 Specifications A/D module specifications (line input) Dynamic range 20Hz-20kHz >115dB “ A ” weighting >117dB THD+N 1kHz, -1dBFS, 20Hz-22kHz < 0.00026% (-112dB) Fr equency response +/-0.2dB -3dB 44.
grace design m 201 owner’ s manual 18 AES3 1 INP UTS OP TION AL A NAL OG T O D IGIT AL C ONV ERT ER M ODU LE 2-CH SP DIF CH 1 OU T A 6-CHANNEL A NA LO G OU TPU TS CH1 MIC TOSLINK LOOP SYN C IN WORD .
grace design m 201 owner’ s manual 19 Warranty Information Grace Design warrants all of our products to be free of def ec tive parts and work- manship for a period of five y ears. T his warranty period begins at the original date of purchase and is transf erable to an y person who may subsequently purchase the product during this time.
grace design m 201 owner’ s manual 20 Revision P age Change Date Initials A Initial release 04/25/2007 mbg B 3 Changed voltage range and pow er specifications 04/26/2007 mbg B 4 Po wer switch description changed to standby switch.
デバイスGrace M201の購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
Grace M201をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはGrace M201の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Grace M201の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Grace M201で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Grace M201を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はGrace M201の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Grace M201に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちGrace M201デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。