Section Two—Installation Instructions
PAGE 6
M3 GPS INSTALLATION MANUAL Revision D
4 ea. 3-48
×
G
-inch screws (HS106)
2 ea. 4-40
×
G
-inch screws (HS201)
2 ea. 4-40
×
K
-inch screws (HS213)
4 ea. #3 lockwashers (HW090)
4 ea. #4 lockwashers (HW100)
2 ea. #4 flat washers (HW115)
1 ea. 24-pin connector (KC230)
1 ea. 36-pin connector (KC270)
1 ea. cable cover (XC495)
2 ea. connector float washers (XC435)
4 ea. mylar shims (HM750)
Make sure all parts are present and have sustained no shipping damage. If
there is evidence of shipping damage, save the shipping carton and pack-
ing material to help substantiate your claim to the shipping company. Keep
a shipping carton on hand in case you have to return the unit to the factory
for service.
Preparing the antenna cables
Choosing the
antenna coax
To connect the antenna to the GPS sensor, use RG-58 C/U coaxial cable
(Alpha No. 9058C or equivalent). The outside diameter of the cable must
be approximately 0.24 inches to be compatible with the supplied connec-
tors. For a typical RG-58 cable loss of 23 dB per 100 feet at 1500 MHz,
the cable length between the antenna and sensor should be at least 10 feet
and not more than 50 feet. If the antenna cable is routed near sources of
high electrical energy, then it is recommended that double-shielded coax
be used to reduce radio-frequency interference. Shields should be
grounded at both ends of the cable.
Type RG-59 coaxial cable is also acceptable. For typical RG-59 cable loss
of 18 dB per 100 feet, the cable length should be at least 15 feet and not
more than 80 feet.
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