Garmin 135 GPS Receiver User Manual


 
Installing the GPSMAP 135 Sounder
The GPSMAP 135 Sounder must be properly installed according to the follow-
ing instructions to get the best possible performance. Included with your sounder
is GARMIN power data cable (part no. 320-00023-06) and transducer with cable
(part no. 493-10000-00) which must be used to comply with FCC regulations. To
complete the installation, you’ll need the appropriate fasteners and a 1” x 14-
thread marine antenna mount available at most marine dealers. Also included are
ferrite bead filter clamps (part no. K00-00036-00) which filter RFI radiation from
interfering with nearby electronics.(See appendix C for ferrite clamp installation.)
Mounting the GPS antenna
The antenna should be mounted in a location that has a clear, unobstructed
view of the sky in all directions to ensure the best reception. Avoid mounting the
antenna where it will be shaded by the boat’s superstructure, a radome antenna, or
mast. Sailboat users should avoid mounting the antenna high on the mast to pre-
vent inaccurate speed readings caused by excessive heeling. Most marine VHF and
loran antennas will not seriously degrade the GPS antenna’s reception. Never paint
the antenna or clean it with harsh solvents.
The GARMIN antenna screws directly onto any standard 1” x 14-thread anten-
na mount. If you need to raise the antenna to avoid shading, try using a 1” x 14-
thread extension mast available at most marine dealers.
To install the GPS antenna:
1. Screw the antenna directly onto the 1” x 14-thread mount.
2. Route the cable to the mounting location of the display unit. Use the appropriate tie-
wraps, escutcheon plates and sealant to secure the cable along the route and through
any bulkhead or deck.
3. Once the GPSMAP 135 Sounder unit has been installed, connect the cable to the anten-
na connector on the back of the display unit. Make sure that you turn the antenna cable
connector 1/4 turn clockwise to lock the cable into place.
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SECTION
A
APPENDIX
Installation
BEST
BETTER
GOOD
GPS 135 Rev C 8/4/98 4:19 PM Page 82