jack  on  the  rear  of  the  No.    540,  instead  of  directly  into the  host  depthfinder.    Then  connect  the  jumper  cable from  the  No.    540  remote  to  the  master  unit.    Since  the No.      540   remote   operates   on   a   unique,   "sampling" principle,  it  can  now  "read"  the  signals  passing  between the  master  depthfinder  and  its  transducer,  and  translate those signals into a digital depth readout. MOUNTING     YOUR     NO.          540     IN     A     REMOTE LOCATION If you want to mount your No.  540 in a location remote from  the  master  depthfinder-such  as  on  a  flybridge,  aft fishing    control    station,    nav-com    station,    or    master stateroom-it    will    be    necessary    to    use    an    optional transducer  extension  cable  (Aqua  Meter  Part  No.    AS- DO227.    12  ft.    low-capacitance  transducer  extension cable assembly) with the jumper cable. SPECIAL  TRASDUCER  WIRING  INFORMATION  FOR YOUR AQUA PROBE No. 540 DIGITAL REMOTE Installation  of  the  No.    540  remote  with  a  competitive brand  unit,  may  require  transducer  connector  adaptors. For example: Connector Adaptors:    The  jumper  cable  and  connectors provided with the No. 540 remote will allow connection to all  Aqua  Probe  200  KHz  depthfinders  manufactured  by Aqua   Meter   Instrument   Corp.,   including   Aqua   Probe Recorders, and any other depthfinders in the 1 75 to 225 KHz     range     that     use     standard     RCA     type     phono connectors.  The following Aqua Meter depthfinders and recorders    are    compatible    with    the    No.    540    remote without an additional connector adaptor: the 350 Series, the  No's.    35455,  35859,  361,  364,  366,  372,  373,  374, 375, 340, 370, 380, 390, 394, 530, and 550. For depthfinders in the 175 and 225 KHz range, that use other  types  of  connectors,  the  following  four  methods  of adapting transducer connections may be considered: 1.    Aqua  Meter  offers  connector  adaptor  kits  to  match depthfinders   that   use   the   popular   phone   or   BNC types   of   connectors   for   transducers.      They   are shown below ... a.      For   PHONE   connectors   use   the   Aqua   Meter adaptor kit No.  AS-A0170; b.  For BNC connectors use the Aqua Meter adaptor kit No.  ASA0171. 2.    For  other  connectors,  you  may  be  able  to  purchase the  necessary  adaptors  from  your  local  electronics store.  You will need one of each of the following: a.  Transducer jack to PHONO plug; b.    PHONO  jack  to  transducer  plug.    Aqua  Meter stocks    a    number    of    miscellaneous    connector adaptors  for  the  less  popular  types.    Contact  the factory to check for their availability. 3.  The third alternative is to cut the transducer cable in the area where it passes the No.  540 remote depth indicator  and  install  an  RCA  type  male  phono  plug on  each  cut  end.    These  connectors  then  plug  into the rear of the No.  540 and the jumper cable is not needed. This procedure is the most efficient by far.  It also is the least expensive method. Some experience in electronics and soldering is necessary.  An alternative is to  have  a  local  radio/TV  repair  shop  install  the  phono plugs. NOTE:   Since   this   method   of   installation   requires modification  of  the  transducer  cable,  it  may  affect the  warranty  on  the  transducer,  although,  if  done properly,    no    damage    will    occur    to    either    the depthfinder or transducer. Naturally,  Aqua  Meter  Instrument  Corp.,  cannot  be responsible    for    damage    to    your    depthfinder    or transducer due to faulty installation of connectors. 4.    The  fourth  approach  is  to  use  a  universal  connector adaptor-Aqua   Meter   part   No.      AS-D0226.      This adaptor     also     has     a     built-in     "Balun"     matching transformer.      Therefore,   the   adaptor   can   be   used with two-wire or coaxial cables, as well as with three- wire     or     two-wire-plus-shield     transducer     cables. Instruction  for  installation  of  the  universal  connector adaptor is supplied with the adaptor. 8