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Appendix H
Installing Ferrite Clamp
Installing the Ferrite Bead Clamp (GPSMAP 182C Only)
In order to filter Radio Frequency Interference (RFI) radiation, which could possibly interfere with
items such as televisions, radios, or other marine electronics that are operating in close proximity to the
GPSMAP with GA 29 remote antenna, a ferrite bead filter clamp and neoprene foam strip are included for
attachment to the unit’s antenna cable. The clamp attaches to the antenna cable near the point at which
it connects to the back of the GPSMAP. The foam strip has adhesive on one side and is used to keep the
clamp stationary on the cable.
To install the ferrite bead clamp:
1. Choose a location which is no more than two inches (5 cm) from the back of the GPSMAP.
2. Remove the backing from the adhesive foam strip. Place the strip at an angle to the cable with
adhesive facing towards the cable. Snugly spiral wrap the foam strip around the antenna cable. (Fig. 1)
3. Open the filter clamp by slightly pulling on the latch and opening the filter halves.
4. Position the clamp (Fig. 2) and squeeze it shut around the cable until the latch is securely fastened. If
the clamp is difficult to close, you may want to remove some of the foam strip.
The clamp should not need to be replaced under normal use. Please contact your Garmin dealer or
Garmin Support if you have any questions or require a replacement filter clamp.
Figure 1
Figure 2
Ferrite Bead Filter
Installed filter