Kathrein CAS 120 Manuel de service télécharger pdf (Page 15)

936.2079/A/0206/7.8e

b) Setting the direction (Azimuth)

For the following steps you need an assistant if you

cannot operate an antenna measuring instrument nor

watch on your television set which you have connected

to a satellite receiver the result of your alignment work.

 Select on your satellite receiver a programme well

known in order to make sure you are aligned to the

desired satellite.

 Roughly align the antenna towards the south.

Then slowly turn the antenna around the mast axle to

the left and then to the right, until you obtain the best

picture for the chosen programme.

c) Fine alignment

 Loosen again the screws A on the elevation scale.

 Move the antenna slightly up and down by turning the

fine wing nut B, until

– the strongest signal is shown on the measuring

instrument

– or best picture quality is obtained on the TV set

(only for analogue reception): Move the antenna slightly

up and down until you see the first "spikes" on the

screen of your TV set. The best picture quality will be

found in the middle of these boundary positions.

 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).

Also, optimise the polarisation angle(s) of the feed

system(s) and the angle of the swivelling support once

more.

d) Final tightening up of antenna

Finally, tighten all screws.

Check again that all screw connections have been done

properly.

Secure the cable using cable ties along the full length of

the antenna carrier so that it does not chafe and sustain

damage due to wind effects.

Attention!

Check if the antenna is properly secured after

unusual conditions (bad storms, heavy ice

build-up, etc.).

Zenith

Elevation angle

West

East

Azimuth angle

South

Horizon

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 31 32

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Kathrein CAS 120 Manuel de service Page 15

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