background image

 

6/18/2009 

 

 

4. Technical specifications 

 
 

MM-4220 T/C 

 

Frequency range  

 

25 Hz - 22 kHz (-3 dB) 

THD  

 

<0,004% @ 1 kHz, +12 dBu output level 

Max. gain  

 

72 dB (48+12+12) 

Signal-to-noise ratio  

 

>94 dB@0 dB gain, A-weight 

Crosstalk at full pan  

 

<-50 dB 

Equiv. input ref. noise  

 

<-122 dBu, A-weighted @max gain 

Input sockets  

 

XLR-3F 

Audio input impedance  

 

2 K ohms (mic), 20 K ohms (line) 

Audio input level max.  

 

+12 dBu 

High-pass filter  

 

-3 dB @ 180 Hz, -20 dB @ 30 Hz 

Output sockets  

 

XLR-3M 

Audio output impedance  

 

2 x 100 ohms balanced 

Audio output level max.  

 

+12 dBm (600 ohms) 

Phones socket  

 

3.5 mm 3-pole 

Phones output  

 

2.0 Vrms into 300 ohms 

Phones impedance  

 

32 - 2000 ohms 

Digital output  

 

AES3-id, 75 ohms, 1 Vpp, S/PDIF compatible, RCA 

Sampling frequency  

 

48 kHz 

A/D resolution  

 

24 bits 

A/D dynamic range  

 

98 dB, A-weighted 

D/A resolution  

 

24 bits 

D/A dynamic range  

 

98 dB, A-weighted 

File memory  

 

Compact Flash, type I, FAT32 formatted, max 16 GB 

File type  

 

BWF, stereo, uncompressed, 48/16-24 

Recorder functions  

 

RECORD, STOP, PLAY, FFWD, FREV, SKIPFWD, SKIPREV, PAUSE 

Metering  

 

2x8 LED´s, 3 colors, PPM mode 

Test tone  

 

1000 Hz +/-0,001% @ -12 dBFS (0 dBu) output level 

Real-time clock accuracy 

 

+-2 ppm 

LTC jam input 

 

USB socket pin 4, GND = pin 5 

Ltc jam input signal level 

 

300 mV

p-p 

to 3 V

p-p

 

Phantom power  

 

48 V+-6 V, max 5 mA @ 90% 

Power supply  

 

internal NiMH or ext. 18 V DC@1 A 

Current drain  

 

<220 mA 

Charge current  

 

750 mA 

Size W x H x D  

 

approx. 140 x 60 x 136 mm, excl. sockets and knobs 

Weight  

 

approx. 950 grams 

Battery charger  

 

included, 90-240 VAC 

Carrying case  

 

PortaBrace original, optional 

 
Specifications are subject to change without notice. 
 
 
 

 
 
 

Box contains: 
 
Qty 

Item 

MM-4220 Stereo Mixer / Recorder 

Mains adapter / charger 18V 

CF card 

USB cable 

User´s manual 

 
Option: 

Time Code jam cable 

Содержание MM-4220 C

Страница 1: ...6 18 2009 www marenius se Stereo Audio Mixer MM 4220 T C Manual Version 1 03 T C ...

Страница 2: ... AUDIO OUTPUTS 2 2 4 PHONES OUTPUT 3 2 5 DIGITAL OUTPUT 3 2 6 USB SOCKET 4 3 USER INSTRUCTIONS 5 3 1 AUDIO MIXER 5 3 2 AUDIO RECORDER 6 3 2 1 16 24 bits mode selection 6 3 2 2 Checking recording buffer state 7 3 3 SETTING THE INTERNAL CLOCK 7 3 4 TIME CODE SYNCHRONIZATION JAM 8 3 5 POWER SUPPLY 8 4 TECHNICAL SPECIFICATIONS 9 ...

Страница 3: ...t panel is the PPM bar graph with 16 multicolor LED s covering the range 50 to 0 dB in optimized step size You will also find the master pot and the headphones pot as well as a switch for selecting 48V phantom power for 0 2 or 4 channels The CF card slot will accept up to 16 GB cards Recordings are saved in uncompressed WAV format on FAT32 formatted cards Recordings are stereo 16 24 bits 48 kHz se...

Страница 4: ...og inputs is shown in table 2 1 Table 2 1 Balanced analog audio input Connector type XLR Female Ground Pin 1 Hot Pin 2 Cold Pin 3 In case a line level signal is connected make sure the 48V front panel switch is set to OFF mid position For an unbalanced line level signal connect in accordance with table 2 2 Table 2 2 2 3 Audio outputs There are two balanced XLR3 male sockets for line level outputs ...

Страница 5: ...tput conforms to the AES3 id format This is essentially a professional AES EBU format in an unbalanced RCA socket Data format is AES EBU3 while electrical interface is equal to that for coaxial S PDIF 0 5 Vpp 75 ohms Table 2 6 Unbalanced analog audio output Connector type XLR Male Ground Pin 1 Signal Pin 2 Do not connect Pin 3 Phones output Connector type 3 5 mm 3 pole Ground sleeve Left tip Right...

Страница 6: ... for setting 16 or 24 bits recording resolution Along with a specially made cable connected to the USB port a LTC time code signal may be connected for jamming the internal clock to frame accuracy This cable uses pin 4 for LTC signal and pin 5 for GND The LTC signal level should be approx 1 Vp p for proper jamming The USB socket may also be used for software updates Instructions for use are includ...

Страница 7: ...ment that is connected to the XLR line output sockets Equipment connected to the digital output needs no gain calibration MM 4220 is now ready to be used as an ordinary mixer Select 48V phantom power for microphone inputs 1 and 2 or 1 2 3 and 4 if required Note that the sum of all phantom currents used must not exceed 5 mA Also note that phantom power does drain the battery more Adjust gain for ea...

Страница 8: ... and within recordings This key is valid only while in playback mode A brief press will skip to previous file unless file played is the first recorded Press hold will skip backwards within the file This is the STOP key It will end a recording and save the file with a new file number In playback mode it will halt playback and return the mixer outputs to mixer mode This is the RECORD key Pressing it...

Страница 9: ...ed 3 Connect a USB cable between the PC and MM 4220 Avoid using a USB hub a direct USB socket is preferred 4 The found new hardware wizard starts Follow the on screen instructions pointing the wizard to the folder where the unzipped driver files are located If a window appears with a note about the driver not being verified agree to install anyway 5 When done a message will show up indicating that...

Страница 10: ...es and disconnect the cable The internal clock is now synchronized to the external LTC time code Whenever a new recording starts the time code data will be written in the BWF file header Note that a new recording will always start on the increment of seconds hence the frame number written is 00 3 5 Power Supply MM 4220 runs from an internal NiMH power pack This is a high capacity pack with re char...

Страница 11: ...98 dB A weighted D A resolution 24 bits D A dynamic range 98 dB A weighted File memory Compact Flash type I FAT32 formatted max 16 GB File type BWF stereo uncompressed 48 16 24 Recorder functions RECORD STOP PLAY FFWD FREV SKIPFWD SKIPREV PAUSE Metering 2x8 LED s 3 colors PPM mode Test tone 1000 Hz 0 001 12 dBFS 0 dBu output level Real time clock accuracy 2 ppm LTC jam input USB socket pin 4 GND p...

Отзывы: