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Kamesan KS 342_operating Manual

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    KS-342
    used  as  direct  outputs  from  channels  3  and  4).  The  wiring  is: 
    1 = ground, 2= L+, 3 = L –, 4 = R+, 5 = R–. There is a choice of output 
    levels:  –20 dB  or  – 60 dB,  selectable  by  the  switch  immediately 
    below this connector.
    ST  OUT This  unbalanced  3.5 mm  stereo  jack  output  provides 
    another  stereo  output  for  feeding  unbalanced  inputs  (on  a 
    camera, for example). The level is – 60 dB. 
    SOURCE  SELECT  switch This  allows  the  choice  of  whether 
    the MAIN and SUB connectors above output the mixed left and 
    right output busses (MIX), or whether they output the individual 
    channels in pairs (DIRECT OUT).
    AES/ EBU The KS -342 is capable of outputting the stereo output 
    in AES/EBU format. The sampling frequency is selectable with 
    the  rotar y  switch  beside  the  XLR -3  outputs  at  either 44.1K, 
    48K or 96K  (all  Hz).  The •  position  represents  the  off  position 
    (no digital signal is output).
    NOTE
    When this digital output is enabled, it uses battery power. If you 
    are not using it, make sure that the switch is in the off position, 
    to extend the life of the batteries.
    DC IN Use this to connect a DC power supply, providing between 
    +10 V and +15 V at no more than 600 mA. Wire the connector as 
    marked on the panel. 
    						
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    KS-342
    Front panel
    The  front  panel  is  where  you  will  make  the  majority  of  the  set-
    tings while you are using the KS -342.
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    Channel routing switch (x 4) Each channel has a switch that 
    allows  the  channel’s  output  to  be  routed  to  either  the  left  (L), 
    right (R) or both (C) output busses.
    In  addition,  channels  1  and  2  have  another  setting: MS,  which 
    allows  these  channels  to  be  operated  in  MS  mode  (with  a 
    stereo  microphone,  for  example).  Both  the  1  and  2  channels 
    must be set to MS, and various other features of the mixer also 
    change.  These  are  detailed  in  the  section  later  referring  to  the 
    MS mode.
    LCF/ PFL switch (x 4) Use this control to sweep the low- cut fil-
    ter frequency (–12dB/octave) between 20 Hz and 200Hz.
    Though there is no way to turn this filter off, in practice, setting 
    the cutoff frequency to 20 Hz has the same effect as turning it 
    off, as most microphone systems are not sensitive to sounds in 
    that frequency range.
    Press  this  control  (it  is  non - latching)  to  perform  a  pre - fade  lis-
    ten (PFL) on the channel (the level is shown on the right meter). 
    More than one of these PFL controls can be pressed at the same  
    						
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    KS-342
    time,  but  in  this  case,  the  level  and  right  VU  meter  indication 
    will be lower than the actual values.
    Channel faders The nominal position is at about the 2 o’clock 
    position, when the fader is pointing to the channel number.
    NOTE
    In MS mode, faders 1 and 2 have a slightly different meaning, as 
    explained in the appropriate section.
    Slate  microphone This  built- in  microphone  allows  the  opera-
    tor to make comments, or clapperboard, etc. signals to be add-
    ed to the main mix.
    Input selector (x 4) Use this to select between the following:
    P48 Condenser  microphones  requiring  +48V  phantom  power-
    ing
    Dy - M Dynamic  microphones
    LINE Line - level sources
    A - B - A - B type microphones
    NOTE
    Ensure that only microphones corresponding to the selection 
    are connected to the appropriate inputs, otherwise damage may 
    occur to the KS-6001 and to the microphones.
    Input trim control (x 4) Used to adjust the level of the signal 
    fed to each channel. The amount of trim depends on the input 
    setting:  the  blue  figures  indicate  line - level  settings,  and  the 
    white figures indicate microphone levels.
    Fader  link  (FD  LINK)  switch  (x  2) When  these  switches  are 
    on  (pushed  to  the  right  position),  the  even - numbered  faders 
    control the levels of the two linked channels (not in MS mode).
    Battery  check  button  When  the  unit  is  turned  on,  pressing 
    this  momentar y  non - latching  button  allows  you  to  check  the 
    batter y health using the left meter. The further the meter is de-
    flected, the more life there is in the batteries.
    Meter  light/Oscillator  switch This  switch  serves  two  func-
    tions. In its up position, the meters are illuminated. 
    In the down position, the built-in 1 kHz line-up oscillator is acti-
    vated (together with the meter light). In order to see the output 
    level using the oscillator:
    1. Make sure that both the OUTPUT level switches are set to 
    the correct value (usually +4). 
    						
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    KS-342
    2. Turn the power on (up), and then turn the oscillator 
    switch on (down).
    3. To monitor both channels together, set the monitoring 
    selection switch to the L/R setting (for an explanation of 
    the monitoring switch settings).
    4. Adjust the level of the outputs so that the meter reads 0 
    dB (or the equivalent, depending on the meter.
    5. Remember to turn the oscillator off when the adjustment 
    has been made.
    The center position is off.
    Master  level  controls  Adjust  the  output  level  with  these  con-
    trols.  These  are  recessed  to  avoid  accidental  changes  to  the 
    output level in normal operation.
    Monitor  selection,  level  and  headphone  jack Select  the 
    signals  monitored  through  the  headphones  using  the  monitor 
    selection control. AUX selects the auxiliar y signals, L selects the 
    left, and R selects the right output bus, L / R is stereo and L+R is a 
    mono combination of the left and right busses. Note that these 
    assignments change in MS mode, as explained below.
    Use the level control to set the monitoring level as heard through 
    the headphones, plugged into the standard 1⁄4" stereo jack.
    Power switch and indicator Turn the unit on by pushing the 
    switch up. The indicator lights green when the internal batteries 
    are  used,  and  orange  when  an  external  power  supply  is  used. 
    It  flashes  when  the  batter y  level  becomes  low.  When  it  flashes, 
    you should replace the batteries.
    COMP  indicator Lights  when  the  compressor  is  in  operation, 
    as switched from the side panel.
    NOTE
    The compressors use battery power. Turn the compressors off 
    when you do not need them to extend the life of your batteries.
    SLATE  button Push  to  activate  the  slate  function  with  the  in-
    ternal microphone.
    Meters There are three different types of meter available with 
    the  KS -342.  These  are  factor y - fitted  and  are  not  user- replace-
    able,  depending  on  the  model  of  your  KS -342,  you  may  have 
    one of the following types of meter fitted: 
    						
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    KS-342
    VU  scale These  meters  conform  to  the  VU  standard,  providing 
    an averaged level reading. 0 VU marks the reference position.
    BBC  scale Developed  by  the  British  Broadcasting  Corporation, 
    this  peak  meter  standard  goes  from  1  to  7  (each  step  repre-
    sents  4  dB)  with  a  fast  rise  and  slow  fall  time.  The  reference 
    level is “6”. 
    Nordic  scale Another  peak  meter  type,  with  0  again  being  the 
    reference level, but the readings are from – 42  to +12 dBu.
    In  each  case,  a  peak  LED  is  provided  as  part  of  the  metering 
    system, which lights at 6 dB below maximum level.
    MS operation
    MS  operation  is  usually  carried  out  using  a  specialized  micro-
    phone designed for this kind of recording. 
    To  use  the  MS  facility  with  channels  1  and  2,  make  sure  that 
    both  channels  1  and  2  have  their  output  destination  selected 
    as MS.
    Note that the dedicated XLR - 5 connector can be used with ap-
    propriately - wired  microphones  in  this  mode.  It  provides  phan-
    tom  power,  etc.  in  exactly  the  same  way  as  the  XLR -3  connec-
    tors,  and  the  line  selector  switches,  etc.  should  be  set  appro-
    priately.
    The AUX inputs cannot be used for cascading in this mode.
    The  fader  for  channel  1  becomes  the  width  control  for  the  MS 
    signal, and the fader for channel 2 is the level control.
    The  fader  gang  switch  (1-2)  obviously  cannot  gang  the  faders 
    in  MS  mode—instead,  it  inverts  the  phase  of  the  signal  fed  to 
    channel 2.
    When monitoring, the L+R mode takes a new meaning, with the 
    decoded left and right signals being decoded.
    AES/EBU output
    The  AES/EBU  jack  provides  digital  output  in  AES/EBU  format, 
    at the selectable sampling frequencies of 44.1, 48 or 96 kHz.
    The resolution is 20 bits. 
    						
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    KS-342
    Expansion
    The KS -342 may be used together with the KS - 6001 sub mixer, 
    which provides a further four channels of input feeding the AUX 
    bus,  and/or  the  KS - 6002  compressor/EQ  module,  which  pro-
    vides sweepable 2 - band EQ and compression facilities for each 
    channel.  The  KS -342  can  act  as  the  power  source  for  these 
    units, which integrate neatly with the built- in connector on the 
    top panel of the unit. 
    These  modular  connectors  allow  you  to  build  up  a  portable 
    Kamesan system in a similar way to a child’s building block set, 
    without  the  need  for  other  connectors  or  cables,  as  all  audio 
    signals and power are carried by these built- in connectors.
    There  is  no  need  to  make  any  switch  assignments  on  any  of 
    the  units—for  example,  when  the  KS - 6002  is  connected,  the 
    compressors  and  EQ  circuits  are  automatically  inserted  into 
    the  channels, etc.
    You  should  note  that  since  these  expansion  units  do  not  have 
    their  own  power  supplies,  there  will  be  an  additional  drain  on 
    the KS -342 batteries, and the batter y life will be shortened.
    Attaching and detaching units
    When  attaching  units  to  the  KS -342,  you  should  remove  the 
    rectangular  connector  cover  on  the  top  panel,  keeping  it  and 
    the  screws  in  a  safe  place  before  fitting  the  other  unit,  so  that 
    its male connector on the bottom plate mates with the female 
    connector on the top of the KS 342. The locating pins situated 
    on the bottom of the other unit should match the locating holes 
    on the top panel of the KS -342.
    To  detach  a  sub - unit  from  the  KS -342,  move  both  locking  le-
    vers on the top center sides of the KS -342 forwards and lift.
    See  the  documentation  supplied  with  the  KS - 6001  and  KS -
    6002  for  full  details  regarding  the  fitting  and  the  use  of  these 
    units. 
    						
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    KS-342
    Specifications
    Audio specifications
    Input levels (all 
    continuously variable 
    and electronically 
    balanced)
    MIC–70 to –30 dBs
    LINE–20 to +4 dBm
    AUX–20  to +4 dBm
    Input impedanceMIC3.0 kΩ 
    LINE600 Ω
    AUX10 kΩ
    Headroom32 dB (pre -fader input)
    Analog output levelsMAIN+4/ 0 / –20 / – 60 dBm switchable 
    (600Ω load) transformer balanced 
    XLR -3 type
    SUB–20 / – 60 dBm switchable  (600Ω 
    load) electronically balanced XLR -5 
    type
    UNBAL– 60 dBs (10 kΩ load) 3.5 mm 
    unbalanced stereo  jack
    MONI0 dBs /50Ω (max load 8 Ω)
    Maximum output levelsMAIN+24 dBm (600Ω load, +4 selected 
    @ 12 V)
    +20 dBm (600Ω load, +4 selected 
    @ 8 V)
    SUB– +8 dBm (600Ω load, –20 selected 
    @12V)
    UNBAL– 60 dBs (10 kΩ load) @ 12 V
    MONI+6 dBs (50 Ω load, @ 12 V)
    Digital outputAES/ EBU format, XLR -3 type 
    connector. FS: 44.1/48/ 96 
    (selectable), resolution, 20 bits 
    						
    							18
    KS-342
    Other parameters
    Microphone powerP- 48V (maximum power 10 mA)
    A - B 12V (maximum power 30 mA)
    LCF (low - cut filter)20 Hz — 200 Hz, continuously variable, –12 dB /
    octave
    Oscillator1 kHz (±10%)
    CompressorThreshold level+3/+6 /+9 /+12 dB
    Attack time2 ms (approx)
    Release time300 ms (approx)
    Ratio2:1 (approx)
    Audio performance
    Frequency responseMAIN OUT &SUB OUT30 Hz — 40 kHz  (within 1 dB)
    Noise levelMIC (–70)< –54 dB  (22 kHz LPF/ RMS)
    LINE (+4)< –70 dB  (22 kHz LPF/ RMS)
    MONI< – 65 dB  (22 kHz LPF/ RMS)
    Total Harmonic Distortion (THD)
    						
    							19
    KS-342
    Power and general specifications
    Internal power supply8 x type 3 (AA) dry - cell batteries, 
    carried in standard battery holder
    1 x NP-1 NiCd battery, carried in 
    optional battery holder
    External power supply+10 V to +15 V (maximum 
    current 0.5 A)
    CurrentNominal160 mA
    Digital output on240 mA
    Battery life (normal 
    temperature, no 
    additional modules, 
    digital output off)
    Manganese cells> 4 hours
    Alkaline cells> 8 hours
    NP-1 NiCd> 12 hours
    Dimensions (excl. 
    protrusions)
    w x d x h215 x 170 x 60 (mm)
    8.5 x 6.7 x 2.4 (in)
    Weight (approx)inc. batteries2.4 kg (5.3lbs)
    excl. batteries2.0 kg (4.4lbs) 
    						
    							20
    KS-342
    Block diagram
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