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c) Fine alignment
Loosen again the screw on the elevation scale and move
the antenna slightly up and down until
-
the strongest signal is shown on the measuring instru-
ment
-
or best picture quality is obtained on the TV set. To do
this, swivel the antenna up and down until you reach
the respective limits where the first „snow" (analogue) or
„blocks" (digital) appear on the screen. The best picture
quality will be found in the middle of these boundery po-
sitions.
•
Now alternately correct the direction (Azimuth) and the
inclination (Elevation) until there is no more improvement
of the measured value or the picture quality.
Note: On tightening-up the nuts on the mast clamp, a slight
movement of the antenna may occur! You need to take this
into account during fine adjustment (and exploit it to get a
very precise adjustment if need be).
d) Final tightening up of antenna
Finally, hand-tighten the wing nuts on the mast clamp in
alternation. Then tighten the wingnuts by 1 turn using an
open-ended spanner (SW 13 mm).
•
Next tighten up the screws at left and right on the inclina-
tion scale support by
•
first hand-tightening using the shorter end of the hexagon
spanner
then further tightening by 1/4 to 1/2 turn using the
spanner's longer end.
•
Last of all, check again that all screw connections have
been done properly
•
and secure the cable using cable ties along the full length
of the antenna carrier so that it does not chafe and sus-
tain damage due to wind effects.
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