Manuale d’uso / di manutenzione del prodotto M201 del fabbricante Grace
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owner’s manual all contents ©2007 Grac e Design/ Lunatec LL C m 20 1 manual Rev D 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.
120 V ac PUSH PUSH PUSH 1 3 2 4 PUSH 1 3 2 4 PUSH PUSH 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 GRACE DESIGN USA .
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 available 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 -15 V A U9 C40 P4 . ' ) 3 % $ % # ! 2 ' C42 7 4 C 5 4 C 7 3 R 2 4 R C46 +6 .5 V TP 5 TP 6 +3.
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 INPUT OFFSET ADJUSTMENT The input amplifiers in the m201 are ultra-precision laser trimmed devices which have 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> C17 TP5 TP6 C51 C12 R40A C36A C53 R40B C36B J4B P1 CHAN NEL 1 P7 R17B R18B CHAN NEL 2 C13B R.
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.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Grace M201 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Grace M201 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Grace M201 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Grace M201 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Grace M201, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Grace M201.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Grace M201. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Grace M201 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
