Shively Labs 6842, Инструкция по установке, эксплуатации и техническому обслуживанию, Страница: 35 / 64

27
Connecting the Antenna (2-bay)
7 Connecting the Antenna (2-bay)
Mount the power
divider.
a. Using two power divider mount kits ( Figure 17 , 30 ), mount the two-way
power divider ( 29 ) to the mounting structure, with its outlet ports roughly
halfway along the antenna array. Locate the mounts as close to the ends of
the power divider as you can.
Connect the antenna
cables.
CAUTION
All O-rings are made of silicone. Do not lubricate them with silicone
grease, as this will soften the O-ring. Use only a light lubricating coat of
O-Lube (provided) or petroleum jelly; too much may hamper electrical
contact and contaminate the interior of the system.
Be sure the O-ring is properly seated in its groove and not pinched
between the flange contact surfaces.
a. Coat each O-ring ( Figure 16 , 26 ) lightly with O-Lube (supplied with the
antenna), then install it in the O-ring groove in the flange.
b. Before connecting each flange, make sure an inner conductor connector is
in place in the inner conductor of the flange.
CAUTION
Do not overtighten the flange nuts. Overtightening may damage them.
c. Using the 7/8" EIA flange hardware kits ( Figure 17 , 27 ), connect the
unlabeled input ends of the antenna bay cables ( 31 ) to the power divider
outputs. Tighten flange nuts evenly in accordance with Table 1 on page 1.
CAUTION
Stressing a coax connection after assembly can detune the system.
Therefore, never make a connection and then bend or twist the cable, or
use the flange to force the coax into shape. Form the cable first, then
attach it to the flange.
CAUTION
The minimum bending radius for 1/2" coax is 10" (0.25 m). Do not bend
it too tightly; you may damage it.
d. Using the M6 metric nuts (provided with the bay), connect the output ends
(labeled "Gas Block Termination") of the antenna bay cables to the antenna
bay input flanges.
e. Secure the cables to the mounting pole or tower leg, using tie-wraps ( 28 ) or
customer-supplied cable clamps.
Install the optional
fine-matching
transformer

(if applicable)
One of the unique features of Shively Labs antenna systems is the adjustable
impedance-matching transformer ( Figure 20 , 57 ) available with the antenna.
It allows the installer to compensate for changes in the input impedance
caused by the installation (tower, conduit, ladder, etc.).
NOTE
The transformer may be oriented in whichever direction you wish. Make
it easy for yourself to reach for adjustment at startup.
Install the transformer at your antenna array input. This will be at the input
flange of the power divider ( 29 ). Transformer mounts are generally similar to
feedline mounts and should be installed in the same manner.