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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).

Advent VISLINK Newswift 90 User Manual

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