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m108 Owner's Manual

page 40

DA CONVERTER/Headphone Amplifier - All measurements at Fs=48kHz unless otherwise noted.

THD+N

0dBFS In, 90, +8dBu Out, 22Hz-22kHz BW

<0.0006%

0dBFS In, 1.0V Out (31mW), 22Hz-22kHz BW, 32Ω load

<0.0025%

Intermodulation Distortion

SMTPE/DIN 4:1 50Hz, 7kHz, 1.0V out, no load

<0.008%

SMTPE/DIN 4:1 50Hz, 7kHz, 1.0V out, 32Ω load

<0.008%

Frequency response

Fs=96kHz , ±3dB

0.5-45.9kHz

Fs=96kHz , ±0.2dB

0.5-45.9kHz

Dynamic Range

20-22kHz bandwidth

112dB

20-22kHz bandwidth and A weighting filter

115dB

Output Noise

20-22kHz, volume=0-90

-104dBu

A weighting filter, volume = 0-90

-106dBu

20-22kHz, volume=90.5-99.5

-97dBu

A weighting filter, volume = 90.5-99.5

-100dBu

Crosstalk

1kHz

<98dB

20kHz

<72dB

Attenuation Range

0 to -99dB, 0.5dB steps

Channel Tracking Accuracy

+/-0.05dB

Maximum Output Level

+18dBu

Impedance

Headphone Output Impedance

0.5Ω

Control Room Output Module Line Output

47.5 Ohms

Содержание m108

Страница 1: ...m108 microphone preamplifier ADC Owner s Manual Revision C September 27 2016 Grace Design Lyons CO 1 303 823 8100 www gracedesign com info gracedesign com ...

Страница 2: ...h modest audio production and engineering abilities can turn it on plug in a microphone connect it to a workstation and record But of course it also has a very deep and useful feature set of which all users should educate themselves Not only will this enable you to operate the m108 more efficiently but will free you up to focus on the music and the recording So please famil iarize yourself with th...

Страница 3: ...e 10 C to 40 C Storage and transportation temperature range 40 C to 70 C Maximum altitude 3000m 9843 ft Equipment suitable for continuous operation 2 2 SAFETY MARKING SYMBOLS This symbol located on the equipment and in this manual refers to important instructions Read this manual thoroughly before operating this equipment This symbol located on the equipment and in this manual indicates the potent...

Страница 4: ... Channel 1 2 balanced HI Z instrument inputs on front panel High contrast wide viewing angle OLED display for all system parameters and setup menu Combination RS 485 422 serial MIDI ports for control from existing m802 RCU or ProTools m108 Controller App for Mac OS and Windows computers RJ45 Ethernet port with web server for network control using standard web browser Expansion slot for optional Au...

Страница 5: ...enu 7 GROUP mixer channel pan control 8 OLED display screen all system parameters and setup menu 9 EDIT encoder navigates and controls all system functions 10 Power switch 3 3 Rear Panel Connections 1 IEC 90 250VAC power input 2 Ethernet Control Port 3 Serial Control DB9 RS485 RS 422 MIDI IN MIDI OUT 4 Option card slot 5 Word Clock BNC IN THROUGH OUT 6 ADAT Lightpipe output 7 USB 2 0 audio interfa...

Страница 6: ...ice So please take a few minutes to complete and send in the enclosed card or simply fill out the warranty registration form on our website We always keep your information private Thank you 4 2 Connecting the m108 POWER CONNECTIONS The m108 has a built in universal power supply which accepts line voltages of 90 to 240VAC We include a power cable specified for the country where it was ordered so it...

Страница 7: ...external clock generating unit This might be a stand alone clock source or via for example the Word Clock output from your digital audio workstation The m108 locks to the in coming word clock with an ultra low jitter PLL The PLL has a fast lock mode which rapidly acquires lock and then switches to a high jitter rejections mode with a loop bandwidth of 0 5Hz This provides excep tional jitter reject...

Страница 8: ...peed fan to comes on to cool the internal circuits if the main circuit board temperature rises above 45ºC 113ºF The fan has four speed ranges which are triggered by the following pcb tem perature points 1 45ºC 113ºF 2 49ºC 120ºF 3 52ºC 125ºF 4 55ºC 131ºF If the m108 is mounted without space above and below and it is adjacent to heat generating devices then the internal temperature can rise above 4...

Страница 9: ...ttom surface exposed to ambient air If it is necessary to mount multiple m108s in a rack without spaces in between them there should be forced air ventilation in the rack cabinet to ensure adequate cooling This type of mounting is not recommenced unless the rack is located in a climate controlled environment i e not outside in the hot sun m108 Owner s Manual page 9 ...

Страница 10: ... enter the m108 mixer 5 3 The Front Panel Hardware Switches The labeling convention for these switches is as follows UPPERCASE Preamplifier mode function lowercase Mixer mode function parenthesis Push Hold function The four hardware switches between the VOL MUTE knob and the OLED display enact the following functions 48V mute pressing this switch will turn on the phantom power supply for a selecte...

Страница 11: ... up titled system in the setup menu will show the 8 mic preamp channels and a system status window on the right which shows basic ADC and wordclock status The Mixer mode is activated by pushing and holding the VOL MUTE mix The Setup mode is activated by pushing and holding the PEAK CLR setup button Mic Preamp Operating Screen 1 Channel number 2 Level meter 3 48V icon 4 Hi Z input icon 5 Over indic...

Страница 12: ... Channel number name 2 Channel level display 3 Channel pan display 4 Mute 5 Solo 6 2ch monitor input level 7 Master 2ch mix level 8 Monitor Source select 9 Headphone Source select m108 Owner s Manual page 12 1 2 3 5 6 8 9 4 7 ...

Страница 13: ...ribbon controls Button toggles that function on or off for that channel Press and hold the PHASE button to toggle RIBBON mode for the selected channel 7 The bar graph meter at the right edge of each channel section is a dBFS level meter which indicates ADC output levels from 60 to 0dBFS Note If you would like a larger view of the selected channel press and hold the EDIT encoder This will enter you...

Страница 14: ...al level meter will display a bright square next to the gain level number to indicate an OVER at the ADC If this is shown a level adjustment should be made OVER indicators will remain on until cleared with the peak clear switch 5 10 Channel Group Mode The Group mode allows between 2 to 8 adjacent mic preamp channels to be grouped together for gain change operations To enter group mode press the GR...

Страница 15: ... the headphone output or the optional stereo CR control room output module To enter the m108 mixer press and hold the VOL MUTE mix encoder knob The mixer screen will ap pear This screen has 3 pages which automatically change as the cursor travels across them from side to side They are 1 mixer channels 1 4 2 mixer channels 5 8 3 monitor channel master monitor source select and headphone source sele...

Страница 16: ...s the solo switch The channel will be solo d and solo status will be indicated by the solo indicator icon being backlit bright yellow 3 Press the solo switch again to un solo the channel 6 5 The MON channel The MON monitor channel is a stereo channel that can be be sourced by any of the m108 s available 2ch monitor inputs USB 2 0 interface Aux pairs 1 4 The USB channels are whatever stereo audio s...

Страница 17: ... counter clockwise until you reach hp src press to exit 7 Navigating and Using the Setup Menu Because there are so many ways to use the m108 we have designed a very simple but powerful setup menu for controlling and adjusting all available setup parameters 7 1 To enter and navigate the setup menu 1 Press and hold the PEAK CLR setup hardware switch on the front panel The display will change to show...

Страница 18: ...96kHz 176 4kHz 192kHz usb select this to have the sample rate automatically set by the USB audio interface Dante select this to enable the optional Dante interface When Dante is enabled the sample rate is set in the device configuration tab for the m108 in Dante Controller 2 adc clocksource This setting sets which wordclock source the m108 ADC uses to operate To set the clock source you wish to us...

Страница 19: ... output This setting sets which wordclock source will be present at the WC OUT THROUGH BNC connector on the m108 rear panel To set your desired clock output setting 1 Scroll to the setup menu item 4 clock output 2 Press the EDIT encoder to enter edit mode 3 Turn the knob to select your desired option 4 Press the EDIT knob again to enter your selection and exit edit mode The available options are i...

Страница 20: ...d the peak signal indicator is permanently displayed until a higher peak has been recorded or the peak clear switch is pressed 8 display mode The main mic preamp operating screen has 7 different display modes that you can choose between de pending on how you are using the system and what display information you would like to see on the screen as default To set your desired display mode 1 Scroll to...

Страница 21: ...headphone source and headphone output level with a large number The mid dle of the screen has the large horizontal dBFS meter across the top which includes scale numbers between 60 and 0dBFS The full 11 character channel name is shown if entered as well as the 48V and phase reverse status and the large gain number is displayed in the right side screen area 9 display brightness The high contrast OL...

Страница 22: ...ll appear which can be scrolled across the bottom of the individual character positions Press the EDIT knob to input the desired character Options are lowercase letters a z uppercase letters A Z numbers 0 9 a space and a dash When you are done selecting a character press the encoder to enter your character and advance to the next character you wish to edit When you are done scroll to and push the ...

Страница 23: ...isplayed between an underline and overline and its brightness intensified 5 Press the EDIT knob to enter edit mode for the selected field which will be indicated with a bright gradient background The preset save edit fields are preset number turn the EDIT knob to select the preset number press to enter the channel preset select mode then turn the encoder to select the number 1 99 When you have rea...

Страница 24: ...or will appear which can be scrolled across the bottom of the individual character positions Press the EDIT knob to input the desired character Options are lowercase letters a z uppercase letters A Z numbers 0 9 a space and a dash When you are done selecting a character press the encoder en ter your character to return to the character select mode and advance to the next character you wish to edit...

Страница 25: ...nd The ethernet edit fields are mode There are two modes of network operation available in the m108 auto DHCP and static Press and turn the edit knob to select between the two options Press again to return to the menu Auto or DHCP Dynamic Host Configuration Protocol mode can be used when the net work is managed by a DHCP server In this configuration the m108 will automatically ne gotiate an IP add...

Страница 26: ...the cursor mode Advance to the next number to edit When you are done scroll to and push the left side back arrow to enter the IP address The static IP address is stored in non volatile memory and will be restored when switching from auto to static IP mode For a peer to peer network between your computer and the m108 s manually set the IP address in your com puter s network setup and configure the ...

Страница 27: ...d display features are as follows 1 Channel number the preamp channel number as determined by the preamp device ID 2 Channel name the user defined name for each preamp channel Names are limited to standard alpha numeric characters and have a maximum length of 11 characters 3 0dBFS Over indicator Illuminates red when the signal level has clipped on the channel This indicator is sticky and is cleare...

Страница 28: ...onfiguring the m108in the I O and Peripherals settings in ProTools it is necessary to choose the exact same settings as the AVID Pre For a detailed discussion of Pro Tools Pre configuration please read the AVID PRE user guide which can be found here http www avid com media avid files support pdf resources pdf pre_guide_v90_70448 pdf file subject to relocation google will help Chapter 3 includes op...

Страница 29: ...t can be downloaded from the Grace Design website http www gracedesign com support support htm 8 4 Serial Control The m108 can be controlled via serial RS422 or RS485 by the m802RCU the dedicated hardware remote control unit for m802 preamplifiers However the m802RCU must have RS484 RS422 I O and firmware version 5 0 or higher Contact Grace Design if you need upgrade instructions With the upgraded...

Страница 30: ...for configuring Dante Setup menu 1 adc samplerate Setup menu 2 adc clocksource Setup menu 3 Dante ext sync To enable the Dante interface go to Setup menu 1 adc samplerate and select Dante This connects the Dante interface to the network and configures the ADC to the last used Dante sample rate Sample rate changes must be made from the Dante Controller interface Selecting any other option from the ...

Страница 31: ...the current configuration to non volatile memory When powered back on the m108 will restore the previous configuration and there will be an approximately 10 second delay while the Dante module is initialized 9 5 Clock Modes There are a total of 4 clocking modes for the m108 with Dante Below is a description of each 1 Brooklyn II card is Dante clock slave adc clocksource is Dante ADC is clocked fro...

Страница 32: ...udio data will be transmitted ticking or dropped samples S1 ETH BROOKLYN II ETH WC OUT WC IN m108 Dante Interface INTERNAL CLOCK ADC DAC CLOCK IN WC IN WC OUT S2 S3 s LOCK PLL 3 Brooklyn II is Dante clock master Dante ext sync is internal adc clocksource is internal m108 is System Master using Internal Clock Note Check boxes Preferred Master and Enable Sync To Exter nal for this m108 in the Dante ...

Страница 33: ...s word of word 75Ω m108 is System Master using external WC IN Note Check boxes Preferred Master and Enable Sync To External in Dante Controller m108 Owner s Manual page 33 S1 ETH BROOKLYN II ETH WC OUT WC IN m108 Dante Interface INTERNAL CLOCK ADC DAC CLOCK IN WC IN WC OUT S2 S3 s LOCK PLL ...

Страница 34: ...vices as m108 The m108 will provide 8 input channels and 2 out put channels In most cases simply choose the m108 as your audio recording or playback device and the system will work In the event that you have any setup issues which aren t addressed by these resources feel free to con tact us directly at 303 823 8100 Monday through Friday 9 5 MST 11 2 Using the m108 as a DAW Interface With the extre...

Страница 35: ...ftware will be available at a future date 12 1 To update the firmware on the m108 1 Download the m108 firmware package from the Grace Design Website and unzip it on your com puter 2 Turn off the m108 and connect your PC via USB to the USB 2 port on the m108 3 Turn on the m108 4 Open GraceDesignAudioDfu exe application installed in the Grace Design USB Audio Driver Direc tory The default path for t...

Страница 36: ...e application will indicate that it is ready for firmware update 7 Click on Start Firmware Upgrade to begin the firmware upgrade process The progress of the up grade will be indicated in a pop up dialog box 8 DO NOT DISCONNECT THE DEVICE OR INTERRUPT POWER TO THE m108 WHILE THIS IS IN PROCESS m108 Owner s Manual page 36 ...

Страница 37: ...e front panel display shows the previous and new version numbers during this process As long as the progress line is moving across the screen the system is busy updating This will take several min utes to complete DO NOT DISCONNECT THE DEVICE OR INTERRUPT POWER TO THE m108 WHILE THIS IS IN PROCESS 12 Once the system update is completed the m108 will prompt you to restart the preamp 13 Should the f...

Страница 38: ...E DIN 1 1 50Hz 7kHz 001 SMPTE DIN 4 1 50Hz 7kHz 0020 Noise Referred to Input 60dB gain 50Ω source 129dB 60dB gain 150Ω source 127dB 60dB gain 600Ω source 123dB Phase Deviation 40 20KHz 40dB gain 5 Crosstalk Any Channel 40dB gain 1kHz 127dB Any Channel 40dB gain 10kHz 113dB CMRR 60dB gain 20dBu CM 1kHz 75dB 60dB gain 20dBu CM 10kHz 85dB 60dB gain 20dBu CM 60Hz 55dB Maximum Output Level 27dBu 23dBu ...

Страница 39: ... 0 2dB 3dB 44 1kHz Fs 15Hz 21kHz 6Hz 22kHz 48kHz Fs 15Hz 23kHz 6Hz 24kHz 88 2kHz Fs 15Hz 41kHz 6Hz 44kHz 96kHz Fs 15Hz 45kHz 6Hz 48kHz 176 4kHz Fs 15Hz 54kHz 6Hz 72 5kHz 192kHz Fs 15Hz 59kHz 6Hz 79kHz Full scale input level analog output 0dBFS 24dBu Crosstalk Interchannel crosstalk 1kHz 140dB Interchannel crosstalk 10kHz 130dB Group Delay AES3 Out 22 Fs 44 1kHz Fs 0 5ms 48kHz Fs 0 5ms 88 2kHz Fs 0...

Страница 40: ...0 008 Frequency response Fs 96kHz 3dB 0 5 45 9kHz Fs 96kHz 0 2dB 0 5 45 9kHz Dynamic Range 20 22kHz bandwidth 112dB 20 22kHz bandwidth and A weighting filter 115dB Output Noise 20 22kHz volume 0 90 104dBu A weighting filter volume 0 90 106dBu 20 22kHz volume 90 5 99 5 97dBu A weighting filter volume 90 5 99 5 100dBu Crosstalk 1kHz 98dB 20kHz 72dB Attenuation Range 0 to 99dB 0 5dB steps Channel Tra...

Страница 41: ...1 48 88 2 96 176 4 192 External Clock Lock Range FS 1 5 Intrinsic Jitter 10Hz 20kHz BW Internal Clock 40ps RMS External Clock 40ps RMS Jitter Rejection Corner Frequency 500mHz Weight and Dimensions 5 2lbs 2 3kg 1U rack mount W16 75 x D10 Power Consumption 90 250V 50 60Hz 25 Watts ...

Страница 42: ...14 Block Diagram m108 Owner s Manual page 42 ...

Страница 43: ...15 Cable Diagrams 1 1 DB25 pinouts 1 2 DB9 pinouts 1 3 MIDI breakout cable 1 4 MIDI jumper m108 Owner s Manual page 43 ...

Страница 44: ...l 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 tele phone 303 823 8100 Monday Friday 9 00am to 5 00pm MST or you can register your product on line at www gracedesign com This warranty is in lieu of all other warranties whether written expressed or implied I...

Страница 45: ...al release 07 25 16 EDG B Added Web Browser Control info Added Updated Ethernet Setup 08 31 16 JEK B Added Firmware Upgrade Instructions Product Specifica tions Thermal management 9 3 16 MBG C Add OSX version for USB operation 9 6 16 MBG m108 Owner s Manual page 45 ...

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