Instruction/ maintenance manual of the product M201 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.
An important point after buying a device Grace M201 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Grace M201 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Grace M201 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Grace M201 you will learn all the available features of the product, as well as information on its operation. The information that you get Grace M201 will certainly help you make a decision on the purchase.
If you already are a holder of Grace M201, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Grace M201.
However, one of the most important roles played by the user manual is to help in solving problems with Grace M201. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Grace M201 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
