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7
Installation
Mounting the
Receiver
If a problem is found, try altering the location of the
unit or wiring. Often moving the antenna a few feet away
from the source of interference will solve the problem.
When a suitable configuration is found, a permanent
installation should be made. Select the mounting location
according to your preferences. Keep in mind that from
this mounting location cables will be routed to the
antenna and to the GPS unit.
1. Once a suitable mounting location has been
determined and tested, secure the antenna mount
at the desired mounting location.
2. Make sure the GBR 23 is aligned properly to avoid
thread damage. Thread the GBR 23 onto the
antenna mount and hand tighten clockwise until
snug (Fig. 1). Do not overtighten.
3. Align the notches on the power/data cable and GBR
23 connector and push it connector in until it seats.
Turn the locking ring clockwise until the power/data
cable is firmly locked into position.
4. Route the power/data cable from the GBR 23 to the
GPS unit. Excess cable may be shortened or coiled
together and secured in an inconspicuous location.
If additional cable is needed you may use GARMIN’s
optional 60’ cable (010-10284-00) or similar 24
AWG shielded wiring. The entire length of the
power/data cable should not exceed 200’ (60.9m).
Three common sources of interference for DGPS
units are:
Radar
ABOVE- OK
BELOW- OK
EMI
3'
VHF Radio
Radar
EMI (Electromagnetic Interference) from engine components
Power/Data
Cable &
Connectors
Antenna
Mount
When routing the power/data
cable, try to avoid:
• Sharp edges which may cut the
cable
• Routing the cable parallel to
other power lines
• Excessively twisting, straining or
bending the cable
Figure 1: Mounting
the GBR 23
GBR 23 Manual.p65 5/23/00, 1:28 PM7