302 User Guide and Technical Information
Contents
1. 2 AE s C ne Sprig 9 g a ve a EN E GR 1 z TR 2 Link 160 LCR 3 160 7 7 Eu o o d 6000 1 Fader 8 Slate Mic Tone Switch The primary control for input adjusting level during operation 2 Peak LED When illuminated indicates that the channel is very near overload 3 Limiter LED When illuminated indicates that the channel limiter is operating and reducing channel gain to prevent overload 4 Gain Trim The coarse gain control Sets the input sensitivity so that the Fader can be used for fine gain control with the channel fader 5 Polarity Reverse Switch Input 2 When engaged the polarity of Input 2 is reverse 180 out of phase with respect to inputs 1 and 3 Useful to flip the stereo image with MS stereo 6 Limiter Switch Activates both input and output limiters ON is dual mono limiter operation LINK is stereo operation Output limiter threshold controlled in Setup Menu 7 Output Meter Sunlight viewable 20 segment LED meter Calibrated in dBu when peak reading Two position switch activates the slate microphone in the left momentary position or the tone oscillator in the right latched position Additional options available in the Setup Menu 9 Pan Switch Assigns2. pin 1 use Hirose HR10 7P 4P DigiKey HR100 ND for locking mating DC connector Power Consumption 130 mA 4 5 V internal batteries idle no phantom 55 mA 12 V external DC idle no phantom Dimensions and Weight Size Mass 47 mm x 214 mm x 114 mm H x W x D 1 8 x 8 4 x 4 5 0 85 kg 1 8 Ibs unpackaged with three alkaline AA batteries SOUNDSDEVICES 302 User Guide and Technical Information Accessories Several high value accessories are available for the 302 mixer including a carry case cables and power accessories For a full list of Sound Devices products and accessories visit our web site www sounddevices com products CS 3 Production case with high quality strap for use with 302 7 Series recorders and MixPre NP type battery compartment and accessory pouch for wireless Built for Sound Devices by CamRade TA3 F to TA3 F Interconnection cables for 302 to 302 and 302 to 442 linking 24 inch package of 2 XL 3 3 5 mm to TA3 F link cable for MixPre MP 2 Tape Output to 302 Mix In 20 inch XL 4 Bag of four 4 TA3 F type connectors XL H Bare Hirose connector Hirose p n HR10 7P 4P to mate with locking 4 pin DC power jack XL NPH NP type battery cup with 12 inch cable with Hirose 4 pin locking power jack at equipment end For use with 302 442N 442 and MixPre XL WPH2 Universal in line AC to DC power supply with detachable IEC powe
3. SOUNDS DEVICES SOUND DEVICES
4. 1 kV EN61000 4 5 2001 TEC61000 4 5 2001 Surge 1 kV differential mode line to line 2 kV common mode line to ground EN61000 4 6 2001 ITEC61000 4 6 2001 Conducted RF immunity 3 V 80 1 kHz amplitude modulation EN61000 4 11 2002 TEC61000 4 11 2001 Voltage dips and short interruptions at test voltage level 0 V unominal 70 V unominal 25 period Tested by L S Compliance Inc Cedarburg Wisconsin March 26 2003 pl keka Matthew Anderson Director of Engineering Sound Devices LLC SOUND DEVICES 302 User Guide and Technical Information Warranty and Technical Support Warranty Sound Devices LLC warrants the 302 Production Mixer against defects in materials and workmanship for a period of ONE 1 year from date of original retail purchase This is a non transferable warranty that extends only to the original purchaser Sound Devices LLC will repair or replace the product at its discretion at no charge Warranty claims due to severe service conditions will be addressed on an individual basis THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE SOUND DEVICES LLC DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE SOUND DEVICES LLC IS NOT RESPONSIBLE FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING FROM ANY BREACH OF WARRANTY OR UNDER ANY OTHER LEGAL THEORY Because some juris
5. 30 XLR Attenuation Line level 0 add the indicated values on left Selects the amount of attenuation from Line level on the XLR Level and right meter for attenuation amount Outputs 26 Output Limiter 1 dB increments from 4 to 20 dBu level Sets the Output Limiter threshold in dBu see page 12 in User Thres Adjustment shown on meter Guide for more details 24 Stereo Link Ch 1 2 OFF 30 Stereo Link 26 MS Link 24 Links inputs 1 and 2 as a stereo pair either X Y or MS stereo 22 Input Limiter Defeat OFF 30 ON 26 When ON input limiters remain OFF at all times 20 RTN L to Ch 4 Input OFF 30 L only 26 R only 24 L R 22 Routes RTN Left to the master bus with set pan assignment 18 RTN R to Ch 5 Input OFF 30 L only 26 R only 24 L R 22 Routes RTN Right to the master bus with set pan assignment 16 Tone Osc Frequency 1000 30 400 26 100 24 Hz Selects the frequency of the sine wave tone oscillator 14 Tone Osc Level OFF 30 20 dBu 26 10 dBu 24 1 dB Selects the output level of the tone oscillator in dBu at LINE increments to 8 0 dBu is default level 12 Slate Mic ON OFF ON 30 Tone Slate 26 OFF 24 Activates the slate mic Tone and slate offers a 400 Hz tone preceding the slate mic 10 Metering Source ST amp PFL 30 Follows headphone switch posi Selects the metering source PFL levels are show on the left tion 26 STereo only 24 meter
6. apply attenuation Successively press the down button until the 30 LED right meter and the 10 LED left meter are illuminated 5 Step through all setups using the PK VU button until the meters dance The setting is now saved and the Output Attenuation LED should now be lit SOUNDS DEVICES n 302 User Guide and Technical Information Tape Out Mix Output tape out The 302 has an unbalanced two channel tape level output on a single locking Switchcraft MXOUT TA3M type connector Tape output program is the same as the XLR Output The Tape Out level is fixed at its 15 dBu nominal level and is electrically isolated from the XLR Outputs The 302 Tape Out is used to connect the 302 to numerous inputs including MiniDiscs DATs compact cassette recorders and wireless transmitters Additionally the Tape Output functions as the Mix Out to link multiple Sound Devices mixer See Mixer Linking Output Limiters OFF LIM LINK In addition to the limiters on each input channel the 302 has a software controlled Output Limiter Output limiters are used to prevent overloading of recorders cameras and wireless transmitters connected to the 302 The Output Limiters on the 302 use an optoisolator based peak limiting circuit The Output Limiter threshold is set in the Setup Menu The Output Limiter can be set in one of two positions Link or LIM Link Stereo Operation When set in the link position the Output Limiter acts identically
7. includes mixers preamplifiers computer interfaces recorders and their accessories a v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information Quick Start Checklist Proper setup of sound sources and input devices is quick and easy with the 302 Follow the steps outlined below for basic interconnection Powering the Unit 1 Insert three AA batteries with side first into the mixer battery tube 2 Switch on the mixer power by sliding the power switch to INT The power LED will illuminate solid green with good batteries Interconnection 1 Connect the output XLR connectors of the 302 to the destination recorder camera or other input 2 Connect microphones wireless receivers or other signal sources to the input XLR connectors 3 Switch phantom or T power on as need by microphone sources Setting Output Gain Structure 1 Determine the required input level of the destination If a line level connection is required no further output level adjustment is needed on the 302 If the input level requires less than line level such as microphone or a 10 dBu level adjust the master output level accordingly see Output Level Control 2 Turn on the 302 s tone oscillator Adjust the input sensitivity on the destination device so that the 302 output is at an average level with sufficient headroom to accommodate signal peaks For
8. many digital cameras and recorders this is often a range between 20 and 12 dBFS as read on the recorder or camera s peak meter With analog devices setting input sensitivites so that tone is near 0 VU is typical Setting Input Levels 1 Select the overall level mic or line for the input channel 2 Set the channel fader to the unity gain position 3 Raise the gain control push up trim while talk testing inputs so that signal indicates on both the 302 s level meter and the recorder camera level meter Monitoring 1 Connect headphones to the headphone connector located on the input panel 2 Set the headphone source to ST to monitor stereo program Raise the headphone volume level to the required level The 302 headphone output is capable of producing ear damaging levels Turn down levels before switching headphone sources 3 Monitor individual sources by moving the headphone selection switch to the 1 2 or 3 positions SOUNDS DEVICES F 302 User Guide and Technical Information Front Panel Descriptions cee ee bi ss e 22 60 40 e e Al y 00 GAIN _ PK g LIM D 0 q gt P A e OFF A e22 60I a p 46 9
9. 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information Powering The 302 can be powered from either internal batteries or from external DC The power efficient 302 can operate from three AA alkaline batteries for nearly a production day less with phantom powering While many users prefer external DC sources to power both their mixer and wireless receivers the use of internal batteries is perfectly feasible for both primary and backup powering of the 302 Power Switch and LED The 3 position power switch selects between internal batteries external DC or power off Because of the power supply design of the 302 the unit takes approximately 10 seconds to fully stabilize its power supply after power up Additionally there is sufficient capacitance in the circuit to toggle between internal and external without disruption in audio The power LED illuminates solid green to indicate good power When the power source falls below the threshold voltage See the Setup Menu Chart the power LED begins to flash Once flashing changing the power source is recommended Internal Batteries The 302 uses a unique battery tube to hold 3 AA batteries This robust tube is sealed to prevent potential battery leakage from ruining internal circuitry The threaded nickel cap extends beyond the panel to make battery changes easy and quick The battery tube extends
10. 42 field mixer and on the 7 Series digital recorders Source The meter can display levels of the output buses the PFL levels or levels from the RTN inputs Default operation is always the output bus except when PFL s are selects from the Headphone Selection Switch This operation can be modified in the Setup Menu aN T O tn k A M it 5 ge mee il oo Press to cycle through available meter ballistics selections Press to change LED brightness Scale When viewing peak information on the meter its scale is calibrated in peak reading dBu When viewing VU information its scale corresponds to VU units Unlike other analog mixers the 302 is calibrated with its 0 VU reference at 0 dBu not 4 dBu If you primarily interconnect with analog video cameras you may want to change the 0 VU reference to 4 dBu by making the change in the Setup Menu The 302 s scale is designed for digital recording devices providing maximum information between 30 dBu to 0 dBu where typical peaks occur 50 to 20 dBFS This allows the user to record with a full 12 to 20 dB of headroom while in the fine resolution green colored part of the meter Additionally the meter color changes to orange at 0 dBu and then red at 8 dBu These color changes correspond to 20 dBFS and 12 dBFS respectively which are commonly used recording levels for today s digital recording devices IRT Scale Compliance The 302 meter scale can be s
11. 8 Meter Reference OVU 0 dBu 30 0 VU Peak 3 dBu 18 Selects VU and or Peak dBu reference level Level OVU 4 dBu 26 0 VU Peak 4 dBu 16 VU and Peak OVU 8 dBu 24 0 VU Peak 5 dBu 14 O VU Peak 1 dBu 22 0 VU Peak 6 dBu 12 0 VU Peak 2 dBu 20 0 VU Peak 7 dBu 10 0 VU Peak 8 dBu 8 6 Split Ear Monitor OFF 30 ON 26 Program Mix 24 Assigns summed mono RTN signal to left headphone output and R program to right headphone output Active in RTN position 4 Headphone ON 30 OFF 26 Reduces the headphone level by 20 dB when tone oscillator Attenuation w Tone is activated 2 External Battery 1 30 2 26 3 24 4 22 5 20 6 Selects the external DC range of the voltage check function Voltage Reference 18 see voltage metering chart below and power LED flash point 0 Meter Ballistics VU PPM VU PPMHold VU PPM 30 Selects meter ballistics choices selected when toggling the Select PPM VU PPMHold VU PPM 26 front panel meter ballistics switch VU VU PPM Hold VU PPM 24 PPM VU PPM 22 VU VU PPM 20 PPM only 18 4 Master Peak LED 1 dB increments from 4 to 20 dBu Sets the signal level where the 20 LED illuminates Used to Threshold Adjust level shown on meter set an alternate peak level 8 Slate Tone Switch Normal 30 reversed 26 tone only 24 Changes the functionality of the slate tone switch Switch slate only 22 can be defeated
12. Bu at Line out 0 009 max 50 Hz to 20 kHz 18 dBu at Line out fader fully up Input Clipping Level 0 dBu minimum trim control fully down Gain Matching 0 1 dB Mic In to Line Out Common Mode Rejection 120 dB minimum at 80 Hz mic input Ratio 100 dB minimum at 10 kHz mic input High Pass Filters Switchable 80 Hz or 160 Hz 12 dB oct Mic Powering Dynamic no power applied each XLR selectable 12 V Phantom through 680 ohm resistors 10 mA per mic available 48 V Phantom through 6 8k resistors 10 mA per mic available 12 V T Power through 180 ohm resistors 10 mA per mic available Input Limiters 18 dBu threshold 20 1 limiting ratio 1 mS attack time 200 mS release time Otene Actual Type For use with Max Input Level XLR mic setting 2 5k transformer balanced lt 600 ohm mics 0 dBu 0 78 Vrms XLR line setting 16k transformer balanced lt 2k ohm outputs 40 dBu 80 Vrms Mix In 4 2k unbalanced stereo 302 442 Mix Out 1 8k 6 dBu 1 5 Vrms Return amp ch 4 5 10k unbalanced lt 2k ohm outputs 30 dBu 22 v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information Outputs Line Output Clipping Level 1 THD 20 dBu minimum 18 dBu minimum with 600 ohm load Output Noise 100 dBu 102 dBV maximum 22 Hz to 22 kHz bandwidth flat filter master gain fully up faders fully down O
13. Information Power Consumption The 302 can vary in the amount of current it draws Several functions of the 302 directly affect current draw in different ways The following list highlights the larger current drawing functions listed from highest to lowest current draw Microphone The main source of current beyond the idle current draw See Phantom and T Powering 48 Powering V phantom can draw copious amounts of current out of the batteries depending on what model microphone is used Two phantom powered microphones draw twice as much current as one Microphones vary widely in their current draw depending on type and phantom voltage applied Output Drive Level Higher output drive levels into multiple low impedance inputs increases current draw Headphone Output High headphone output levels increase current draw Meter Brightness Current draw is slightly increased with higher illumination intensities Experimentation is recommended to determine battery life for each individual setup and application The Setup Menu The 302 has 18 available setup features See the Setup Menu Chart for all available options Setups typically set and forget features are infrequently changed With the Setup Menu these features are easily accessed directly on mixer s the front panel Entering the Setup Menu To access the Setup Menu perform the following steps 1 Turn off the mixer if already on 2 Press and hold the Peak VU se
14. Inputs 4 amp 5 10 Advanced Gain Structure and Interconnection 20 OULPUTS ec in vance wnnaner diesen nialean 11 Setup Menu v 3 6 uaaa 21 XLR Outputs 11 Specifications saaana eraa 22 XLR Output Level 11 CCESSOMES spiccros oinnes umn g 24 Tape Out Mix Output 12 CE Declaration of Conformity 25 Output Limiters 12 Warranty and Technical Support 26 Headphone Monitoring A A ET 12 Warranty 26 HP Monitor Selection 13 FCC Statement 26 Headphone Level and Overload LED 13 Welcome The 302 is the essential portable mixer for production companies and camera operators wanting to take control of their audio The 302 is stunning in size flexibility control and performance it is the most compact and cost effective battery powered professional audio mixer in its class With important features to accommodate nearly any over the shoulder production the 302 can interface with any professional microphone wireless system or camera recorder input Its microphone inputs share the same superb circuitry of all Sound Devices field production tools With many of the controls of Sound Devices flagship 442 mixer the 302 has a complete feature set in a compact functional design All controls are accessible on its three main surfaces Its high efficiency power circuitry runs the mixer from either three internal AA batteries or external 5 18 VDC The 302 is part of Sound Devices family of field production audio tools which
15. SOUNDSDEVICES eee ox aiii SN eae je oe R k K we CA 0 302 Compact Production Mixer User Guide and Technical Information Sound Devices LLC 300 Wengel Drive Reedsburg WI USA 1 608 524 0625 fax 1 608 524 0655 Toll Free 800 505 0625 www sounddevices com support sounddevices com 302 User Guide and Technical Information Table of Contents Quick Start Checklist 00 c cee e eee eee 3 Tone Oscillator Slate Microphone 14 Powering the Unit 3 Tone Oscillator 14 Interconnection 3 Slate Microphone 14 Setting Output Gain Structure 3 The Mete rarere a dae oRieanendas 15 Setting Input Levels 3 Source 15 Monitoring 3 Scale 15 Front Panel Descriptions 0eseeees 4 IRT Scale Compliance 15 Input Panel Descriptions 0 ee eens 5 Ballistics 15 Output Panel Descriptions 00008 6 Ballistics Lock 16 INPULS EE EE T 7 Illumination Intensity 16 Mic Line Level Selection 7 Mixer Linking ere ee ee ee ee eee ee ee 16 Gain Trim 7 POWCTING wack cwcccesceeeteerac ses cxeeeaees 17 Fader 7 Power Switch and LED 17 Phantom and T Microphone Powering 8 Internal Batteries 17 High Pass Filters 8 External DC Sources 17 Pan Switches 9 Power Metering 17 Input Limiters 9 Power Consumption 18 Peak and Limit LEDs 9 The Setup Menu 0 ceeeeeeeeeaee 18 Polarity Reverse Input 2 9 Entering the Setup Menu 18 Stereo Linking of Inputs 1 and 2 10 Output Limiter Adjustment 19
16. adphones The front panel rotary switch selects the signal HP Sources Description PFL 1 PFL solo monitoring of the channel one input signal Channel is monitored in mono Pre fade post limiter post high pass Useful for setting the channel gain PFL 2 Same as above but for channel 2 input PFL 3 Same as above but for channel 3 input L Left output bus monitored dual mono R Right output bus monitored dual mono M Summed mono of left and right output bus ST Stereo monitoring of master output bus This is the primary monitoring path RTN Stereo return from the RTN monitor input path M MS Monitoring of the mono signal of an MS stereo signal ST MS Monitoring of discrete MS signals in headphones as decoded stereo signal RTN MS Monitoring of discrete MS return signal in headphones as decoded stereo signal Headphone Level and Overload LED The headphone level knob controls overall headphone level to the phones The adjacent LED indicates that the headphone circuit is overloading The LED will also illuminate with an overloaded RTN signal Return Monitoring Adjusts return input level Indicated by the RTN positions on the rotary switch audio sources connected to the mixers 3 5 mm jack labeled RTN can be monitored in headphones Return or confidence monitoring is useful to monitor audio from a camera or recorder Typically camera headphone outputs are used as the Return Monitor s
17. below the red Peak LED illuminates If the Peak LED comes on often it is recommended to turn down the Gain If limiters are active the amber input limiter LED illuminates during limiting Polarity Reverse Input 2 g a Engaging the polarity reverse switch inverts the polarity of input 2 Polarity reversal is often used to quickly reverse the stereo field in MS recording The normal position is OFF with polarity reversal occurring when the switch is in the position Be advised that an audible pop occurs when the polarity switch changes states SOUNDS DEVICES 9 302 User Guide and Technical Information Stereo Linking of Inputs 1 and 2 Stereo linking allows inputs 1 and 2 to be controlled as a single stereo input This is useful when stereo microphones or stereo line level signals are used with the 302 and the operator wants a single knob for controlling the overall signal There are two modes of operation for stereo linking X Y link and MS stereo In both cases inputs 1 and 2 are used for the inputs Stereo linking is activated in the Setup Menu X Y Stereo Link Inputs 1 and 2 can be linked as a stereo pair to simplify control with stereo microphones X Y stereo linking is set in the Setup Menu When in X Y stereo link operation inputs 1 and 2 pan switches still control signal routing Fader 2 controls the overall level of the pair Each input Gain and high pass controls still function on their
18. by engaging setup 14 and setup 12 12 Default Restore OFF 30 User Default 26 Resets setup menu to either the stored default factory Factory Default 24 Custom Default 22 default or custom default values Voltage Metering Chart Setting High Voltage LED Flash Point Low Voltage Power Source 45 3 4 3 0 Internal batteries 1 13 0 11 5 11 0 12 V NiCad NiMH Li etc 2 17 0 11 5 11 0 Expanded range of setting 1 3 8 5 SVS 55 6 V NiMH Li etc 4 14 0 11 4 10 12 V Lead Acid 5 7 0 Sm 5 0 6 V Lead Acid 6 17 0 11 5 5 0 Full range of DC input with cutoff for 12 V NiCad etc SOUNDSDEVICES 302 User Guide and Technical Information Specifications Measurement settings unless otherwise specified Gain controls for the channel being measured at mid point all other channels gains fully down pan switches centered high pass off inputs in mic position outputs in line position Mic input driven with 150 ohm source Outputs measured with 100k ohm load Temperature at 25 C Maximum Gain typical trim fader master phones RTN fully up Inputs Dynamic Range 115 dB minimum trim fully down Frequency Response 20 Hz to 30 kHz 0 2 0 5 dB 1 dB 5 Hz and 50 kHz typical Equivalent Input Noise 126 dBu 128 dBV maximum 22 Hz to 22 kHz bandwidth flat filter trim control fully up THD Noise 0 007 typical 1 kHz 4 d
19. ctor is now used for inputs 4 and 5 the 4 5 Channel Enabled LED on the output panel illuminates 10 v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information Outputs The 302 is a two bus mixer Because each input can be hard panned between the left and right output bus the 302 is easily used in either stereo or dual mono operation With dialog often recorded in mono each output connector can be used to feed a separate camera or recorder XLR Outputs and Tape Outputs share the same program content The 302 has no master level control The master is factory set to unity gain or 0 dB XLR Outputs The two XLR outputs are active balanced connections each capable of driving long lines These connections can be used either balanced or unbalanced When unbalancing use pin 2 for and pin 1 for ground float leave open pin 3 XLR Output Level With no external mic line level switch the 302 output level is adjusted in the Setup Menu See Setup Menu for details From the factory the 302 is set for Line Level outputs Adjacent to the XLR outputs the Output Attenuation LED indicates if the XLR outputs are at a level other that Line Level L LINE mic R LINE wic a comm OC lt AE if illuminated XLR output Sa tevel is set below line level Line Level or Mic Level or somewhere in between A By adju
20. dictions do not permit the exclusion or limitations set forth above they may not apply in all cases For all service including warranty repair please contact Sound Devices for an RMA number and send the 302 along with proof of purchase date to Sound Devices LLC Service Repair RMA XXXX 300 Wengel Drive Reedsburg WI 53959 USA Technical Support Bug Reports For technical support and bug reporting on all Sound Devices products contact Sound Devices LLC E mail support sounddevices com web www sounddevices com contact_support htm Telephone 1 608 524 0625 Toll Free in the U S A 800 505 0625 Fax 1 608 524 0655 Sound Devices hosts a support forum for 7 Series recorders The URL is www sounddevicessupport com FCC Statement This device has been tested and found to comply with the limits for a class B digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation 26 v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information
21. e manufacturers Today T powered microphones are not as common as phantom powered microphones but many are still in regular use Unlike phantom power T power resistively applies 12 V between the signal pins 2 and 3 T power can be selected for each input The 302 provides positive T power where pin 2 on the three pin XLR connector has 12 volts relative to pin 3 When using red dot T powered microphones reverse polarity T power use a polarity reversing adapter on the input otherwise damage to the microphone may occur Phantom and T powering are not interchangeable Use T powering only for T powered microphones It is generally good practice to turn off phantom power when not using a phantom powered mic as phantom power can capacitively couple noise into the mic inputs with poor mic cables Also turn phantom power off when using ribbon microphones since an improperly wired cable can permanently damage the microphone The DYN dynamic position applies no voltage to the microphone input High Pass Filters 46 Each channel of the 302 has a two position high pass filter High pass or low cut low roll off filters are useful for removing excess low frequency energy in audio signals Wind noise is a common unwanted low frequency signal and a high pass filter is effective for reducing wind noise For most audio applications engaging the high pass filter is beneficial since little usable audio information exists be
22. e Fader can be set to its unity gain postion at 12 o clock With the Fader at unity the dynamic range of the mixer is maximized By setting both the Gain control and Fader inputs with varied sensitivities can be controlled with similar positions on the input Faders SOUNDS DEVICES 302 User Guide and Technical Information Phantom and T Microphone Powering DYN PH I 7 The 302 can provide either phantom power or T power to each input and is selected individually If neither phantom or T power are required for instance with dynamic microphones it is good practice to turn off microphone powering DYN position Phantom Power Phantom powering is a fixed DC voltage between 12 and 48 volts This voltage is resistively applied to pin 2 and pin 3 of an XLR connector relative to pin 1 There is no voltage difference between the signal pins 2 and 3 a dynamic mic can operate just fine in the presence of phantom powering When phantom is selected the 302 can provide up to 10 mA to each input at 48 V sufficient for the most power hungry condenser microphones When acceptable using 12 V phantom is recommended to extend battery runtime Many microphones do not require 48 V phantom and can be properly powered from 12 V phantom power The phantom voltage level is globally selected for all inputs either 12 V or 48 V T Powering T powering is a microphone powering scheme used by several European condenser microphon
23. eter brightness control changes the threshold by 1 dB Three possible LED indications show threhold value e Single solid LED actual value indicates threshold e Flashing LED next to a solid LED indicates that the threshold is one dB above or below the solid LED value e Two solid LEDs threshold value is even number value between the two indicated values Two examples are shown below a setting of 10 dBu and 11 dBu thresholds 4 8 12 16 29 4 8 12 16 29 both 8 and 12 LEDs solid 8 flashing and 12 solid indicates indicates 10 dBu limiter 11 dBu limiter threshold threshold SOUNDS DEVICES 19 302 User Guide and Technical Information Advanced Gain Structure and Interconnection The 302 s unique output attenuator circuit is adjusted in the Setup Menu This can be thought of as a master gain control which comes after the 302 s output meter This circuit allows the user to match the 302 s output level to any recording device When properly set the dynamic range of the system is maximized and the 302 s meters will match the recorder s meters For simple interconnection the following three setting are identical to setting the output switch on the 442 mixer to Line Tape or Mic 0 dB Line 10 dB Tape 40 dB Mic However to tailor the 302 s outputs exactly to the recording device the 302 s output can be attenuated from full line level in 2 dB steps from 0 t
24. hifted to comply with the German IRT specifications Setup Menu item 8 controls the adjustment to shift the meter scale See http www irt de for more information Ballistics The 302 output meter can indicate several different selections of ballistics The available choices that are selected with the front panel meter ballistics button can be selected in the Setup Menu To move from one setting to the next depress the meter ballistics button Settings include SOUNDS DEVICES 15 302 User Guide and Technical Information Peak An important setting used to know the absolute peak signal level to prevent overload of downstream devices Peak only is commonly used in Europe but is being replaced by the PPM VU combination metering VU Calibrated to show average loudness of audio signals Useful when connecting to analog recorders or in combination with peak readings VU meters are too slow to be used as the sole metering with digital devices Note that the 302 factory default has its 0 VU reference at 0 dBu Peak with VU combination A very informative setting which for many users is the default used with the 302 Indicates the absolute peak level as well as the loudness of the signal Peak Hold with VU Similar to Peak VU combination but with the peak level being held for 1500 ms Useful when a peak signal is encountered while the operator is not viewing the meters peak held long enough to know if signal exceeded desired le
25. ht channel connection Turning off the tone oscillator or pressing the battery check button again stops the output cycling Slate Microphone The slate microphone is used to audibly notate scenes at the mixer location Its audio performance is not suitable for critical recording applications it should only be used for documenting scenes to tape The slate mic uses the momentary switch position In the Setup Menu a one second 400 Hz tone can be set to precede the slate microphone The slate microphone signal is sent to all outputs In the Setup Menu the slate microphone can be disabled altogether to prevent unintended activation Additionally the switch assignments of slate and tone can be reversed for user convenience sa v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information The Meter The meter on the 302 provides a great deal of audio signal information for the operator The ability to view peak level PPM average levels VU or a combination of both is unique to Sound Devices LED based meters In addition to the flexibility to provide multiple meter ballistics the meter does not have the inherent limitations of LCD and mechanical meters sluggish indications in cold temperature with LCD s and fragility with mechanical meters The 302 meters share the same technology and software programmability used in Sound Devices larger 4
26. imum Because of their inherently high common mode impedance transformers are unrivaled by any other type of input for common mode noise rejection The inputs of the 302 can be used balanced or unbalanced When unbalancing ground pin 3 to pin 1 of the XLR connector There is no change in gain between unbalanced and balanced connections into the 302 Mic Line Level Selection MIC LINE fm The Mic Line switch on the input panel is used to select the general level for each input Taking into account all gain stages the 302 has 75 dB of available gain from mic input to line output When inputs are set to the LINE position the input sensitivity is reduced by 40 dB Gain Trim Like traditional mixing consoles the 302 s input sensitivity is set using the Gain trim control The Gain control adjusts the input sensitivity so that the channel Fader can used near its unity or 0 position Once set the Gain is typically kept at the set level and all mixing is performed with the Fader control The Gain control features a pop up knob so that it can be adjusted easily and then hidden from the mixing surface Fader While both the Gain and the Fader control the level of an input the Fader is the primary level control used during mixer operation The Gain can be thought of as a coarse level adjustment to be adjusted during set up and the Fader as a fine level adjustment to be adjusted during operation With a properly set Gain th
27. ion see Setup Chart for a list of all setups 3 To move among parameter values press the brightness button down and battery check button up until the 100 Hz position is selected 24 LED will illuminate solid 4 Press the PK VU button multiple times until the meters perform their scrolling dance This saves the new setting into memory To save new values to memory the PK VU button must be repeatedly pressed until the last setup is reached At that point the meters will dance and the new values will be saved to memory User Default A memory location is available to store user defined default settings The user default is helpful to save a baseline of settings different than the factory default settings To save a user default perform the following 1 Hold down both the meter brightness button and battery check button while powering the mixer 2 The current settings will be saved as the user default The user default settings can be recalled from the setup menu by applying the user default restore See the Setup Menu Chart Output Limiter Adjustment Output limiter thresholds are adjustable between 4 dBu and 20 dBu in 1 dB increments The threshold level is shown on the lower right meter string by illuminating LEDs Because LEDs are spaced every 4 dB a combination of flashing and solid adjacent LEDs indicate limiter levels between the numbered LEDs Factory default is 20 dBu Each press of the battery button or m
28. ke care when adjusting among signal sources Input Panel Descriptions 16 17 18 Headphone LED Indicates overload of the headphone circuit and RTN circuit Battery Check Button Hold to show the internal and external battery levels on the output meter Battery level remains for two seconds after button release Power Switch LED Three position switch selects between internal battery power or external DC sources Power LED illuminates when power is on LED flashes when voltage reaches low limit See Powering Q side DYN Transformer Balanced Inputs Can be used unbalanced by grounding pin 3 to pin 1 of the XLR connector Pin 1 ground pin 2 hot pin 3 cold Mic Line Channel Switch Selects the input level of the adjacent connector Mic level has 40 dB more gain than line level Phantom DYNamic T Power Selection Selects the microphone powering type of the adjacent input DYN position turns off all microphone powering Mic powering is selected per input NOTE Use T Powering only for T Powered microphones SOUNDSDEVICES Phantom Voltage Selection Selects between 48 V or 12 V phantom voltage for the input channels The three position switch uses two positions for 12 V there is no difference between these positions Headphone Output 3 5 mm TRS stereo headph
29. lection switch while switching power on 3 The Setup Menu is now entered of a sa Gua E TTT 2 C ae Xe ATT Functions as the down Press and hold while Functions as the up button when in a setup powering on to enter the button when in a setup Setup Menu also used to advance to the next Setup Menu option The mixer will not pass audio when in the Setup Menu When in the Setup Menu the flashing LED on the left meter L position indicates the selected setup feature The right meter R position indicates the values selected for the setup Use the PK VU button advance from one setup to another If the intended setup is passed setup mode must be re entered since you can only step forward through the Setup Menu To adjust values the meter brightness button down and the battery check button up allow selection among setup values Some setups have multiple values while others have only two values 18 v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information Setup Example The following steps show how to change the tone frequency from the factory default of 1 kHz to 100 Hz 1 Enter the setup menu by pressing and holding down the PK VU button while powering the mixer Hold the button until the 30 LED begins flashing 2 Press the PK VU button six times until the left meter LED flashes at the 16 posit
30. low 80 Hz especially for speech reproduction The 302 s high pass filters features a 12 dB octave slope with either 80 Hz or 160 Hz corner 3 dB frequencies The 160 Hz settings is used when aggressive filtering is required The 302 s high pass circuit is unique because of its placement before any electronic amplification Most mixer s high pass circuits are placed after the mic preamp where all of the high energy low frequency signals get amplified Because the 302 s circuit cuts low frequency signals before amplifying higher headroom is achieved in presence of signals with a lot of low frequency energy ol v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information Where possible attempt to equalize at the sound source with microphone selection use of windscreens microphone placement and on board microphone filtering Many microphones have on board high pass filters and the high pass filters on the 302 can be used in conjunction with the microphone s filters to increase the filter s slope The high pass filter are defeated when the switch in the center position Pan Switches The pan switches assign inputs to output buses Inputs can be sent to the left right or both outputs equally The 302 features excellent off attenuation in the left and right positions Using the pan switches a separate mix of source
31. no farther than adjacent XLR connectors Remove batteries when the unit is stored for extended periods External DC Sources For extended mixer runtime use an external DC source The 302 can be powered from any DC source with a voltage range of 5 volts to 18 volts If using an AC to DC transformer such as a Sound Devices XL WPH2 make certain its output voltage falls in the 5 18 V range and can supply at least 4 watts If an over voltage is applied to the mixer an internal poly fuse is opened to prevent mixer damage The fuse is reset when the voltage is removed The external DC supply is isolated floating from the circuitry to minimize ground loop and interaction among devices sharing the same DC source The external DC connector is a Hirose 4 pin female This locking connector mates to Hirose P N HR10 7P 4P Sound Devices P N XL H Pin 1 is negative and pin 4 is the positive voltage Power Metering The battery check button indicates battery voltages of internal and external power supplies on the output meter The left meter shows the internal battery voltage and the right meter shows the external battery voltage Since many different battery types are available for external use the external DC metering can be customized for a given battery in the Setup Menu The power meter is read from left to right with the highest voltage indicated with LED s lit all the way to the left green SOUNDS DEVICES 302 User Guide and Technical
32. o 16 dB line tape levels then in 2 dB steps from 40 to 56 dB mic levels So if 40 dB of attenuation is too hot for a given device s mic input the attenuator could be set to 50 dB or more When interconnecting the 302 to any recording device the best way to set the level between them is to match the 302 s output clipping level with the recorder s input clipping level When this is done and the recording device s input gain controls are kept fixed two things will happen 1 The dynamic range of the recording is maximized 2 All level metering can be done via the 302 s meter The recorder s level meter can be ignored since the only way for the recorder to clip is for the 302 to clip The 302 s meters match the recorder s meters in that the clip points match Because most recorder s meter ballistics and scale are different it is impossible to make the 302 meter exactly match a given recorder s meter However this is irrelevant if the clip levels match EJ v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information Setup Menu v 3 6 Below is the chart of setups for the 302 See Setup Menu on page 15 for instructions on how to enter and navigate the setup menu Factory default settings are displayed in bold Meter Setup Name Setting value on R Meter Descripion
33. on each left right output bus If one output causes the limiter to engage the other bus will follow suit This is useful when using the 302 in stereo limiter operation will not affect the stereo image LIM Dual Mono When using each output bus separately the output limiter should be set to the ON position This position engages each Output Limiter separately They will act on each respective output bus independently of the other While all dynamics processing distorts the audio signal overloading a circuit is usually far more objectionable For most applications the limiters are a significant benefit and should be enabled Headphone Monitoring R ST HP L RTN 3 M 2 IST 1 The 302 has a flexible headphone circuit capable of selecting a variety of audio signals for listening in headphones Most professional headphones ranging in impedance from 8 ohms to 1000 ohms can be used with the 302 The 302 headphone output is capable of producing ear damaging levels Turn down levels before switching headphone sources The headphone level control adjusts the overall volume sent to the headphones The level control adjusts both the left and right headphone outputs simultaneously Ei v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information HP Monitor Selection Several signal sources can sent to the he
34. one output Can drive headphones from 8 to 2000 ohms to required monitoring levels 302 User Guide and Technical Information Output Panel Descriptions k SET UP FEATURE SEE USER MANUAL FOR UNBALANCED XLR OUTPUT DO NOT GROUND PIN 3 XLR Master Outputs Active balanced outputs Pin 1 ground pin 2 hot pin 3 cold Can be unbalanced by using pin 2 for signal and pin 1 for ground Battery Tube Holds three AA batteries for internal powering Accepts alkaline lithium or NiHM rechargeable cells Return Channel 4 5 Level Control Adjusts the gain of the return feed to balance program and monitor signals in headphones Return Channel 4 5 Input Unbalanced stereo 3 5 mm input connector for return monitor audio 3 5 mm wired tip left ring right sleeve ground Connection used for inputs 4 amp 5 when selected in Setup Menu Mix In An input to the master bus designed exclusively to link the Tape Out Mix Out of 302 442 MixPre or MP 2 to the 302 for additional inputs Pin 1 ground pin 2 left pin 3 right Shell of TA3 connector must be grounded to pin 1 to open connection Channel 4 5 Activation LED When illuminated indicates that the return connector is now set as an input 4 and 5 connections Output Attenuation LED When illuminated indicates that the XLR output connectors are set for a level other than the factory default of line level See Se
35. ource Return levels are controlled by the heaphone level while the return level sensitivity can be adjusted with the return input level controls SOUNDSDEVICES 302 User Guide and Technical Information Tone Oscillator Slate Microphone A single 3 position switch controls the tone oscillator and slate microphone The tone slate switch is located in the upper right corner protected from inadvertent engagement by the end panel When the tone oscillator is engaged inputs are muted MIC 1K CO Tone Oscillator Tone is used to set gain levels between the 302 and the next device in the signal path The tone oscillator uses the locking position of the switch This switch can be reassigned in the Setup Menu From the factory the tone oscillator is set to output a 1 kHz tone at 0 dBu to the outputs when the outputs are set to Line level If you are interconnecting primarily with analog video cameras you may want to modify to the tone output level to 4 dBu in the Setup Menu In the Setup Menu the tone frequency and output level can be adjusted or tone can be defeated altogether When engaged the 302 tone oscillator attenuates the headphone output by 20 dB to protect the operator s ears This feature can be defeated in the Setup Menu Left Right Verification Pressing the battery check button when the tone oscillator is active sets the left output level to cycle between 0 and 20 dB This is helpful to verify proper left and rig
36. r cord Input 100 240 50 60 Hz output 12 VDC 30 W on Hirose 4 pin connector 24 v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information CE Declaration of Conformity According to ISO IEC Guide 22 Sound Devices LLC 300 Wengel Drive Reedsburg WI 53959 USA declares that the product 302 Production Field Mixer is in conformity with and passes EN55103 1 1997 EMC product family standard for audio video audio visual and entertainment lighting control apparatus for professional use Part 1 Emissions EN55103 2 1997 EMC product family standard for audio video audio visual and entertainment lighting control apparatus for professional use Part 2 Immunity EN55103 1 Phenomena 2 3 1997 Magnetic emissions at 1 meter 50 Hz 50 kHz EN55103 2 Phenomena 3 1997 Magnetic immunity 50 Hz to 10 kHz CISPR 22 EN55022 2003 Radiated and conducted emissions Class B EN61000 4 2 2001 TEC61000 4 2 2001 ESD 4 kV contact 8 kV air discharge EN61000 4 3 2001 TEC1000 4 3 2001 Radiated RF immunity 10 V m 80 1 kHz amplitude modulation EN61000 4 4 2001 TEC61000 4 4 2001 AC power ports EFT Burst I O lines 0 25 kV to 1 0 kV power line 0 5 kB 1 kV EN61000 4 4 2001 TEC61000 4 4 2001 EFT Burst I O lines 0 25 kV to 1 0 kV power line 0 5kB
37. respective inputs In X Y Stereo linking the limiters for inputs 1 and 2 are linked to operate identically on each signal MS Stereo Linking When MS stereo linking is set in the Setup Menu inputs 1 and 2 are linked as an MS mid side stereo pair MS is a popular stereo configuration because of its good spatial placement mono compatibility and surround compatibility The 302 s MS matrix uses input 1 for the Mid signal and input 2 for the side signal The input 2 Fader controls overall gain Input 1 fader and both inputs 1 and 2 pan switches are disabled The Gain and high pass filters still act individually The Gain control for inputs 1 and 2 is used to vary the Mid and Side levels respectively Using the input 2 Gain is an effective way to control stereo spread Inputs 4 amp 5 mO L ENABLE gar s When additional inputs are needed such as when multiple wireless receivers are used the Return connector can be reassigned to act as an input connector for channels 4 and 5 This functionality is set in the Setup Menu See Setup Menu Several options are available for inputs 4 and 5 Either or both inputs 4 and 5 can be sent to the left right or left and right output bus The sensitivity of inputs 4 and 5 is controlled by the trim control adjacent to their 3 5 mm connector This unbalanced input is suitable for tape or line level devices only There are no microphone preamps on inputs 4 and 5 To indicate that the Return conne
38. s can be sent to the left and right outputs For instance a summed mono mix of all three inputs can be sent to the right output while an isolated mix of one input can be sent to the left output LCR Input Limiters The 302 input limiters act solely as safety limiters and are enabled when the output limiters are enabled with the front panel LIM switch See Setup Menu to defeat Input Limiters entirely In normal operation with properly set input levels the threshold of the input limiter will rarely be reached If extremely high input signal levels are approached such as in high SPL environments or with misadjusted settings the input limiter s will activate to prevent overload Without this limiter hot signals could overload the mixer and cause distortion It is recommended that the input limiters be used at all times Below the factory set threshold just below clipping the limiter has no effect on audio There is no user adjustments to the input limiter threshold or its envelope When inputs 1 amp 2 are linked as a stereo pair their limiters also link to perform the same gain reduction to both inputs equally Each input has an amber limiter LED which illuminates in proportion to the amount of limiting If the orange LED for a channel comes on regularly it is recommended to turn down the Gain Peak and Limit LEDs ee Each input has an indication of peak signal activity When an input nears its clipping level 3 dB
39. sting the attenuation level in the setup menu see Setup Menu for adjustment the output level of the 302 can be adjusted from line level down to mic level Both left and right XLR outputs are adjusts at the same time there is no ability to adjust left right independently Additionally operating levels between mic and line level can be set Attenuation is set from 0 to 16 dB in 2 dB increments and 40 to 56 dB in 2 dB increments The common attenuation levels of 10 aux level and 40 hot mic level and 56 low mic level are available When setting the output attenuation determine how much attenuation is applied by adding the values shown of the solid LEDs For instance to set 40 dB of attenuation the values of 30 right meter and 10 left meter will be indicated Output levels are set depending on the device camera recorder transmitter etc that the outputs are connected This unique control is ideal since the gain structure can be precisely set for any given piece of equipment To change the mixer from line level to mic level perform the following steps 1 Turn off the mixer if already on 2 Press and hold the Peak VU selection button while switching power on Continue to hold down the PK VU button until the 30 LED begins flashing at the left meter 3 The Setup Menu is now entered and Output Attenuation is the first setup the 30 left LED is flashing and the 0 LEDs are lit 4 Use the brightness down button to
40. the input channel to the output bus Left only Center equal left and right or Right only 10 High Pass Filter Low Cut Three position switch engages the high pass filter Used to reduce excessive low frequencies 12 dB per octave at 80 Hz or 160 Hz Center position is off 11 Stereo Link LED Inputs 1 amp 2 Indicates that inputs 1 and 2 are linked as a stereo pair Controlled in the Setup Menu In L R stereo link input 2 Fader controls overall stereo level When in MS position input 1 Gain Trim controls Mid input 2 Gain Trim controls the amount of stereo Side information and the input 2 Fader controls the overall MS stereo level 12 Meter Brightness Controls the brightness of the LED output meter Each push selects among four brightness levels 13 Meter Ballistics Toggles among the available meter ballistic options VU only peak only combo peak VU peak hold VU a v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information 14 15 Headphone Selector Switch Sets the signal source sent to headphones Options include input PFL 1 2 3 left output bus right output bus Mono summed left and right STereo master RTN stereo monitor return MS mono MS stereo RTN MS Headphone Volume Adjusts the overall volume of the headphones NOTE the headphone output is capable of ear damaging levels Ta
41. tup Menu to set XLR output levels Tape Out Mix Out Unbalanced stereo output on TA3 type connector Same program as master output Pin 1 ground pin 2 left pin 3 right Also used to link to the Mix In of a 442 or 302 DC Input Accepts DC voltages from 5 18 VDC for mixer powering Four pin Hirose connector wired pin 1 negative pin 4 positive Ext DC is completely isolated floating from the rest of the circuitry 6 v 3 6 Features and specifications are subject to change Visit www sounddevices com for the latest documentation 302 User Guide and Technical Information Inputs The inputs of the 302 consist of three full featured microphone preamplifiers Each input has a wide gain range to accommodate nearly all signal types The 302 easily accepts signals from low sensitivity ribbon and dynamic microphones medium level wireless and condenser mic outputs and hot line level signals 302 inputs are transformer balanced The isolation characteristics of transformers are superior to other balancing techniques for the hostile and uncontrolled environments of field production Transformers provide galvanic isolation from the driving source meaning there is no direct electrical connection Signals are transformed magnetically The input transformers in the 302 use premium magnetic core material to achieve high signal handling capability especially at low frequencies while keeping distortion to a min
42. utput Limiters affects the Line Output and Tape Out threshold selectable from 4 dBu to 20 dBu 1 dB steps 20 1 limiting ratio 1 mS attack time 200 mS release time Impedance Ohms Actual Type For use with Max Output Level XLR factory Line setting 150 active balanced gt 600 ohm mics 20 dBu 7 8 Vrms XLR mic lowest setting 150 active balanced lt 2k ohm outputs 36 dBu Tape Out Mix Out TA3 1 8k unbalanced stereo gt 6k ohm inputs 6 dBu 1 5 Vrms Headphones 3 5 mm 200 unbalanced stereo 8 2k ohm phones 20 dBu 7 8 Vrms XLR Input XLR Input RTN Mic Setting Line Setting ch 4 5 XLR Output factory line setting 75 dB 35 dB 20 dB XLR Output attenuated 0 16 dB 40 56 dB 25 41 dB 2 dB steps 2 dB steps 2 dB steps Tape Output TA3 type 61 dB 21 dB 6 dB Headphones 1 4 in and 3 5 mm 95 dB 55 dB 30 dB Metering LED Metering 40 segment 2 x 20 sunlight viewable Selectable Peak VU or Peak with or without peak hold VU ballistics Environmental Operation and Storage Power Internal Voltages Operating 20 C to 60 C 0 to 95 relative humidity non condensing Storage 40 C to 85 C 16 VDC bi polar regulated audio rails Power supply batteries 2 4 6 V range internal batteries isolated floating Power supply external external DC input jack 5 18 V locking 4 pin Hirose connector pin 4
43. vels Ballistics Lock The ballistics setting can be locked to prevent unintended changes Hold down the brightness button then press the battery check to toggle ballistic lock There is no indication of whether ballistic lock is engaged Illumination Intensity The output meter can be set for comfortable viewing in all lighting conditions Four levels of brightness are available by depressing the meter brightness button Mixer Linking Make the connection between Tape Out and Mix In mxour MXIN To add inputs to the 302 an additional mixer can can be connected linked into its Mix In connection The unbalanced Mix In connection is directly compatible with Sound Devices MixPre 302 and 442 mixers A simple connection between those mixer Mix Out Tape Out and the 302 Mix In adds their input channel to the 302 s output bus The unit connected via the Mix In will contain all inputs When linking with a 442 a system of seven microphone inputs is achieved Generally when linking to a 442 the 442 is used as the master linking with the 302 s Mix Out to the 442 s Mix In At the 442 outputs all seven inputs appear Sound Device XL 1 accessory cable can be used to link multiple 302 mixers or 302 and 442 mixers Sound Devices XL 3 accessory cable can be used to link a MixPre to the 302 for a system of five inputs Link cables must be wired to short pin 1 to connector shell in order to open the Mix In connection 16 v
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