GEN ERAL
1
This sec tion pro vides in stal la tion in for ma tion for MkVII
Downmast X-Band Trans ceivers.
2
Kelvin Hughes, or appointed agents, contracts only to
supply the equipment, supervise the installation and
final connection of the equipment. The installation must be
made by a fully qualified Kelvin Hughes Radar Engineer.
3
Forward planning for positioning the various units of
the Radar must be made before any installation work is
carried out. A full survey is required in order to establish the
ship’s fitment. This may be arranged with the Technical
Department of Kelvin Hughes or one of the approved
agencies. Details of Agencies worldwide can be found in
Publication KH 400.
MAX I MUM REC OM MENDED WAVE GUIDE
LENGTHS
4
The following maximum waveguide lengths are
recommended:
Std Speed
High Speed
X-band
28m
20m
COM PASS SAFE DIS TANCES
5
Compass safe distances are stated on labels on all
units and are as follows:
Grade I
Grade II
(0.25 degree)
(1 degree)
MkVII Transceiver 1.4 m
0.8 m
TRANS CEIVER AND TURNING MECH A NISMS
6
There are two ver
sions of the MkVII X-Band
Trans ceiver and Turning Mechanism:
(1) 25 kW X-Band, Downmast 24 rpm (CTX-A8
T r a n s c e i v e r a n d C A E - A 3 0 - 6 T u r n i n g
Mechanism).
(2) 25 kW X-Band, Downmast 40 rpm (CTX-A8
T r a n s c e i v e r a n d C A E - A 3 0 - 5 T u r n i n g
Mechanism).
7
The elec tron ics for the downmast sys tem, are housed
in a sep
a
rate bulk
head mounted en
clo
sure. The
downmast trans
ceiver is con
nected to the turn
ing
mech a nism, via elliptical waveguide or waveguide 16.
8
The 24 rpm turn ing mech a nism is used for nor mal
ap pli ca tions. The 40 rpm turn ing mech a nism is used
for high speed craft.
SAFETY NOTES
9
Electrical supplies are to be isolated to any part of the
platfor m when mounting an ant enna/tur ning
mechanism. A suitable safety platform or harness should be
used to avoid personal injury when working aloft.
10
Electrical supplies in the vicinity of the transceiver are
to be isolated during installation.
11
A working platform is to be provided for installing or
servicing the assembly. This should be positioned
approximately a metre below the base of the Turning
Mechanism housing with a guard rail surrounding it.
12
A flat steel plate (12 mm thick approx.), pre-drilled (in
accordance with Figure 1f) to accommodate the
Turning Mechanism and the cable and waveguide from the
Transceiver. The steel plate must be mounted horizontally
and braced with struts for rigidity.
13
The plate has to be sited in a clear area where the
turning Antenna cannot be obstructed by any cables,
mast halyards etc.
14
The Antenna and Turning Mechanism must be hoisted
to the fixing position using a secured block and tackle
or rope strops.
15
Safety personnel must ensure that persons do not
encroach on the area of work.
16
The Antenna and Turning Mechanism
MUST NOT
be
lifted by the array, but the complete unit secured and
hoisted evenly.
Original
4f.1
May 01
KH 2020
Chap 4f
CHAPTER 4F
INSTALLATION & INTERCONNECTIONS - TRANSCEIVER MKVII (X-BAND)
CAUTION
Ob
serve the Health and Safety No
tices at the
front of this man ual.
Summary of Contents for Kelvin Hughes Nucleus 3 5000 Series
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