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Newswift 90-180 Motorised Antenna 13
3.4 FUNCTIONAL DESCRIPTION
The functional limits are specified in section 2.1.
3.5 OPERATING PROCEDURE
The normal operation of the antenna is given in the ACU4XXX operation manual.
3.6 MANUAL OPERATION
The antenna may be moved manually if there is a problem with the control circuit. Before the
azimuth or elevation axis may be manually moved the electric brake must be disabled, this
procedure is described in the DCU Manual.
The azimuth axis is moved by rotating the thumb wheel on the azimuth drive assembly,
which is located below the rear top electronics enclosure panel.
The elevation axis is moved by rotating the elevation axis handle. The elevation axis handle
is inserted into the middle of the left hand end of the elevation axis.
The polar axis is moved by rotating the polar drive motor shaft located beside the feedhorn.
UNOTEU: Excessive azimuth and elevation movements are restricted by mechanical hard
stops. The polarisation axis is not restricted therefore care must be taken not to cause
damage at angles greater than 45 degrees or 90 degrees (non Polar WG Switch).
3.7 GENERAL
To remove the front and rear top electronics enclosure panels, slide horizontally away from
the antenna after the latches have been released. To replace the front and rear top
electronics enclosure panels, slide horizontally towards the antenna and ensure that the
latches are fully secure.
3.8 MULTIBAND FEEDARM FITTING AND REMOVAL INSTRUCTIONS
The Newswift antenna may be fitted with an optional feedarm end arrangement that allows
for a rapid swap over between bands. To change the feedarm end, follow the procedure
below:
Undo the LNB cable (Figure 10).
Pull down the motor cable from inside the feedarm and undo (Figure 11 and 12).
Undo the waveguide quick release flange at the end of the feedarm (Figure 13).
Lift up and rotate the two side feedarm fasteners to release the feedarm end arms (Figure 14
and 15).
Pull the feedarm end back and up to release the feedarm end from the feedarm.
Replacement is a reversal of fitting. When refitting the motor cable ensure that it is pushed
up into and held by the clip inside the feedarm (Figure 16).
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