ET107 Weather Station
41
7.
Mount the saddle bracket to the adjustable angle mount bracket by
inserting the ends of the bracket through the quarter circle notches
).
8.
Put a flat washer, lock washer, and a silicon bronze nut, in that order, on
the ends of the saddle bracket. Do NOT tighten down the nuts at this time.
FIGURE 5-33. Mount antenna saddle bracket
Only rotate enclosure if needed to allow aiming of the Yagi
antenna to the base antenna. Keep solar radiation sensor towards
the south as much as possible. Rotate wind sensor to realign as
needed.
9.
Use the following procedure to install the Yagi antenna for the radio.
Installation of the omnidirectional antenna is similar (FIGURE
).
Mounting hardware that comes in the box with the Yagi antenna
will not be used.
a.
Slide the back of the Yagi antenna into the saddle bracket.
b.
If the Yagi antenna at the station is communicating with an
omnidirectional antenna at the base, align the tines on the Yagi
antenna so they are vertical (FIGURE
). If two Yagi antennas are
used at both ends of communication, align the tines the same. If
interference is a concern, align the tines on the two Yagi antennas
horizontally instead of vertically. This will put the signal out of phase
with other antennas that are aligned vertically.
c.
Tighten the nuts on saddle bracket to hold the antenna firmly in place.
Do NOT over tighten the nuts on the saddle bracket or
damage to the antenna may occur.
NOTE
NOTE
CAUTION
