Grace M201 manual

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 . W e have designed the m201 t[...]

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. •Class I Equipment (grounded type) •Electrical rating: 100-120/220/230-[...]

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 ( +10d B ) 20 30 40 50 60 INPUT MODE + 48V - 20dB A B G F E D C H I grace design m 201 owner’ s manual 4 Front Panel Controls A 24 position gold co[...]

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 m 0 1 2 mic roph one pream plifier 1 2 Pb LEAD F REE RoHS COMPLIE NT A B C D E grace design m 201 owner’ s manual 5 Rear Panel Connections A XLR mic[...]

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. If the output [...]

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 . CAM SET TING LINE VOL T AGE FUSE V ALUE 100V~ 100V~ 250V~ T 500mA L 120V~ 120V~ 250V~ T 500mA L[...]

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. In this position, the main XLR mic inputs are feeding the preamplier and the dual XLR outputs are act[...]

< > 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 48 88 96 176 192 MS CH1-2 LINE CONS OVER OVER B A FS SELECT CLOCK SOURCE ADC MODE INPUT SENS PEAK RESET ADC SOURCE / MODE (hold) H E J F A B I G C D gr[...]

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 MODE this switch is used to select single or dual wire AES, and switch between either professional or consumer fomat D OVER lights illuminate when the AD[...]

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. CL OCK SOURCE The m201 A/D can be run from the inter[...]

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. 2 ) Remove the 8 top cov er screws using a #2 Phillips screwdri[...]

<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 +3.3V 1 4 R 4 5 C 3 4 R 4 4 R P5 R31 4 3 R 2 V E R 6 3 1 T A 5 3 R R38 K2 K3 Q1 C10 K1 P1 FD1 C13 J2 U4 C20 R9 TP1 + 15 V A + 18 V TP2 1 n i P J5 C2 9 P3 U1 1 0 3 C J4 -18 V TP3 TP4 D1 D2 [...]

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. These procedures should be made only by a qualified ser vice technician or at the Grace D[...]

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. It should be noted that this type of cli[...]

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 R62A R14B C52 R20B R21B D14A R51A R52A R60A R61A R2B R1B C42A C4B R6B C1B C43A R7B D13A C35A R53A D16A D17A R8B C10B J3B U1B R37B D10B R38B C22B R15B C[...]

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 44.1kHz Fs 5Hz-21kHz 22kHz 48kHz Fs 5Hz-23kHz 24kHz 88.2kHz Fs 5Hz-41kHz 44kHz 96kHz Fs 5Hz-45kHz 48kH[...]

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 CLO CK CLOCK OUT s-Lock P LL 6-CHANNEL MICROPHONE AM PLIFIER HI-Z INPUT AM P OUTPUT DRIVERS BALANCED WIDE RANGE PLL CH1 HI -Z A ES 3 TX A ES 3 TX AD C[...]

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.  T[...]

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. 04/26/2007 mbg B 6 Added power mains disconnect information 04/26/2007 mbg B 13 Added signal flow diagram 04/26/200[...]