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KH1207
Chapter 1
(2)
Masts, sampsons, posts and rigging of more than 0.6m (2ft) diameter can cause
blind sectors. Increasing the distance between the antenna unit and these objects
will reduce the blind sectors that inhibit a good radar picture. Funnels, crosstrees
and other large areas can reflect energy and give rise to spurious echo returns
especially in close proximity to land. Positioning the antenna close to funnels and
exhaust gasses can adversely affect antenna performance. The antenna units must
not be mounted where the temperature exceeds 70° C.
(3)
Antennas must be kept clear of ships radio and communication aerials to avoid
electrical RF interference that will cause reflections on the radar PPI display.
NOTE:
A heavy duty earthing strap or cable must be taken from the scanner unit to the ship's
earth.
8
The Antenna is to be mounted onto the Transceiver/Gearbox using the 'O' ring and
fixings supplied. Dimensions and weights for the unit are given in Chapter 2.
Power Supply Unit Siting
9
The Power Supply Unit (CZZ-A22) is only required for the High Speed Turning
Mechanism (CAE-A30/8). It is bulkhead mounted in a protected environment and is
secured by four fixings.
SYSTEM DESCRIPTION
10
The MkV Transceiver (CAE-A30/7 and CAE-A30/8) comprises the following main
units:
(1)
Terminals PCB.
(2)
Modulator.
(3)
Magnetron/RF Head.
(4)
Azimuth PCB.
(5)
Receiver.
(6)
Tx Monitor (Optional).
(7)
Brushless Motor PCB (CAE-A30/8 only).
11
The 40V Power Supply (CZZ-A22), used on the High Speed Turning Mechanism
(CAE-A30/8) only, is a separate item of equipment, which is mounted below decks. This
is only required when the parallel interface is used. When the CANbus interface is used the TIU
supplies either +26V (low speed turning mechanism) or +36V (high speed turning mechanism)
for the antenna turning motor, selected by a switch on the power supply.
Amdt 3 (Mar 01)
4
mkv
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