Glomex pandora v8000, User Manual

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PANDORA V8000 - URANIA 2 V9330
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www.glomex.it
6.3 SKEW CALIBRATION (MANUAL)
Satellites can transmit in linear (Europe) or circular
(USA) polarisation. GLOMEX antennas are
designed to operate with a linear or circular
polarisation according to the installed LNB,
depending on the satellite whose transmission you
want to receive and on where you are positioned.
Circular polarisation does not require any calibration
for the optimization of the received signal.
On the contrary, LNB operating with linear
polarisation need calibrating upon installation, in
order to optimize the alignment of the LNB with the
satellite whose transmission you want to receive.
When you are at the same longitude of the satellite,
its horizontal and vertical signals are aligned with
the horizon. When the satellite is east or west of
your position, the signal of the satellite will appear
as clockwise or counterclockwise shifted. Both the
horizontal and the vertical signal will be shifted by
the same angle, and therefore they will always be
perpendicular to each other.
The degree of rotation will depend on the distance
to the east or to the west between the position of
the antenna and the position of the satellite, and on
your distance from the equator.
Once you move to an area with a longitude more
than +/- 10° from the previous position, the LNB
must be manually adjusted in order to obtain the
best possible signal.
Antennas are delivered with the LNB optimized for
an area with longitude 12° East while receiving
satellite 13° East.
For the adjustment of the LNB, proceed as follows:
- loosen the 3 screws on the radome and remove it
from the base;
Instructions for V8000
- loosen the 4 screws fastening the LNB to the dish
(see Fig. 24 ) and manually move the dish,
searching for the parameter of signal quality of
the digital receiver in use as a reference for
correct calibration (please refer to the receiver’s
manual). Calibration does not need to be
changed if the boat remains in the same area and
receives transmission from the same satellite.
Once the desired adjustment has been carried out,
tighten the 4 screws, position the radome onto its
base again and tighten the 3 fastening screws
again.
Instructions for V9330
- loosen the screw fastening the LNB to the dish
(see Fig. 25 ) and manually move the dish,
searching for the parameter of signal quality of
the digital receiver in use as a reference for
correct calibration (please refer to the receiver’s
manual). Calibration does not need to be
changed if the boat remains in the same area and
receives transmission from the same satellite.
Once the desired adjustment has been carried out,
tighten the screw, position the radome onto its base
again and tighten the 3 fastening screws again.
Fig. 23
Fig. 24
Fig. 25