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owner’s manual

all contents ©2007 Grace Design/ Lunatec LLC

m

201

manual

Rev C

microphone preamplifier

optional A/D converter module

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Содержание M201

Страница 1: ...owner s manual all contents 2007 Grace Design Lunatec LLC m201 manual Rev C microphone preamplifier optional A D converter module ...

Страница 2: ...ith the unique features and capabilities of the m201 Also please do not hesitate to contact us directly if you have any questions comments or concerns with your new m201 microphone preampliﬁer Thanks for reading and happy recording The Grace Design Team Contents Welcome 2 Important Safety Information 3 Front Panel Controls 4 Rear Panel Connections 5 Audio Connections 6 Power Connections 6 Preampli...

Страница 3: ...Storage and transportation temperature range 40 C to 70 C Maximum altitude 3000m 9843 ft Equipment suitable for continuous operation Weight preamplifier 7 5kg 16 5lbs SAFETY MARKING SYMBOLS CAUTION READ ACCOMPANYING DOCUMENTS This symbol located on the equipment and in this manual refers to impor tant instructions Read this manual thoroughly before operating this equip ment WARNING ELECTRICAL SHOC...

Страница 4: ...ate if voltage is being fed from an external source i e when using a direct split in a remote recording ap plication Also the 48V switch is used to activate the 130V DPA mic power if this option is installed E polarity reversal switch The polarity reverse switch reverses the absolute phase of the music signal at the input of the preamplifier The switch illuminates green and provides power for a se...

Страница 5: ... seperate recording devices or mixers Out put connections are made via male XLR connectors with pin 2 positive pin 3 negative and pin 1 ground C M S XLR output connectors XLR outputs are provided for sending M S signals in dependently of the standard line outputs Output con nections are made via male XLR connectors with pin 2 positive pin 3 negative and pin 1 ground D IEC AC power input Accomodate...

Страница 6: ...lector switch must be positioned in the HI Z location which changes the preampliﬁer input source from the mic input connector to the front panel TRS jack The input impedance of the in strument input is 2M Ohm balanced and 1M Ohm unbalanced which is ideal for inserting high impedance sources such as guitars with passive pickups as well as any instrument with a high level output Wiring of the HI Z j...

Страница 7: ... INPUT MODE SELECTOR SWITCH The input mode switch to the right of the gain control provides a convenient way for the user to select between the various types of inputs the m201 can accommodate The following in an overview of the four settings 48V This setting should be selected for all general recording applications with most microphone types In this position the main XLR mic inputs are feeding th...

Страница 8: ...a DAT or CDR recorder use the following procedure With the sound source present turn the gain control clockwise until the peak LED begins ﬂashing red then reduce the gain until the red stops ﬂashing Since red indicates a peak level which is 12dB before preampliﬁer clipping 6dB in unbalanced mode it is OK for it to come on periodically during recording If peak indicator ﬂashes red excessively with ...

Страница 9: ...01 In M S mode the m201 accepts the Mid signal in channel 1 and the Side signal in chan nel 2 The LEFT channel output connector provides the sum of the inputs and the RIGHT channel output connector provides the difference of the inputs In M S mode the M S width control adjust the ratio of Mid signal to Side signal in the dedicated M S outputs The LEFT and RIGHT M S outputs are always active which ...

Страница 10: ...le for your m201 the following section will help you become familiar with its features and its operation The m201 A D card is available installed on new m201 s from the fac tory or as an upgrade to your existing m201 If you need more information about up grading your m201 with the A D module please feel free to call us at 303 443 7454 INPUT SOURCE SELECT The m201 A D can receive signals from 3 dif...

Страница 11: ...vel LED remaining lit The peak in dicators can programmed to remain lit indeﬁnitely until the reset switch is pressed inﬁnite stay lit for 4 seconds delay or not stay lit at all off These three modes are selected by simply pressing and holding the PEAK RESET MODE switch for approxi mately 3 seconds which toggles through the three available modes A D Converter Sensitivity The m201 A D converter fea...

Страница 12: ...tivities until the desired setting is illuminated In calibration mode the digital audio meter is conﬁgured such that the 0 position is the target sensitivity level The meter then indicates the current signal level versus this target sensitivity The meter will display a window centered around the target sensitiv ity with a 0 4dB width in 0 1dB increments When the sensitivity adjustment on the A D c...

Страница 13: ... C15 C14 R12 R11 2 1 C U3 D7 C17 R22 R26 R23 6 2 C C25 C32 4 2 C C27 C41 R32 3 4 C 0 5 C 0 1 U 6 1 U 5 1 U R39 1 5 C P6 A VR3 B VR4 VR2 A VR1 B 3362 1 3 3362 1 3 3362 1 3 3362 1 3 FRONT PANEL CH2 B VR4 CH2 A VR3 CH1 B VR1 CH1 A VR2 grace design m201 owner s manual 13 10 Once all desired calibration adjustments have been made press and hold the INPUT SENS button for approximately 3 seconds This wil...

Страница 14: ...01 2 Set all of the gain controls to the 30dB position 3 Connect the audio generator to the input of channel 1 4 Set the generator output level to approximately 20dBu 1KHz 5 If the generator has an unbalanced output refer to ﬁgure 2 below for termination information 6 Connect the level meter to the output of channel 1 7 If the level meter has an unbalanced input refer to ﬁgure 1 for unbalanced out...

Страница 15: ... place 2 Set all of the preampliﬁer gain controls to maximum 3 Turn on the m201 preampliﬁer and allow to warm up for at least 45 minutes go get a nice cup of coffee and do some stretches 4 Remove the top lid and locate the DC offset test points TP1A and TP2A see ﬁgure 4 next page Place the Volt meter probes into these holes 5 Locate DC offset potentiometer VR1A VR1B for channel 2 and rotate it for...

Страница 16: ...grace design m201 owner s manual 16 ﬁgure 4 offset test point and peak LED adjust trim pots ...

Страница 17: ...2dB octave 10Hz A D sensitivity Range A 22dBu 0dBFS 18dB headroom Range B 18dBu 0dBFS 14dB headroom can be calibrated for any setting between 18dBu 0dBFS and 24dBu 0dBFS preampliﬁer speciﬁcations without A D converter Frequency Response 40dB gain 0 2dB 50Ω source 18Hz 65kHz 40dB gain 3dB 50Ω source 4 5Hz 350kHz THD N 20dB gain 25dBu out 1kHz 0008 40dB gain 25dBu out 1kHz 0009 60dB gain 25dBu out 1...

Страница 18: ... B AMPLIFIER M S SUMMING AMPLIFIER M S DIFFERENCE LEFT OUT RIGHT OUT AES3 2 INTERNAL CLOCK LINE IN LEFT LINE IN RIGHT FROM M S OUTPUT FROM PREAMP CH 1 2 ADC INPUT SELECTOR CLOCK OUT SELECT M S OUTPUTS CLOCK CONTROL FS SELECT 48V 130V MID INPUTS CH 2 OUT A ANALOG OUTPUTS CH2 MIC MICROPHONE AMPLIFIER OUTPUT DRIVERS BALANCED 2 CHANNEL CH2 HI Z CH2 DPA DPA INPUTS OPTIONAL CH 2 OUT B SIDE CLK SELECT AD...

Страница 19: ...ervice it is important that you mail the completed warranty registration card enclosed with all of our products within 10 days of the original date of purchase You may also register your product directly with Grace Design by telephone 303 443 7454 Monday Friday 9 00am to 5 00pm MST or you can register your product online at www gracedesign com This warranty is in lieu of all other warranties wheth...

Страница 20: ... B 3 Changed voltage range and power speciﬁcations 04 26 2007 mbg B 4 Power 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 2007 edg C 9 12 Added A D module inﬁrmation 11 08 07 edg Manual Revisions ...

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