Naval Mark 20CA User manual

Antenna manual 3039 v1.06 07.02.01 page 1/4 © Copyright 2002 Naval Electronics AB
Since 1971, the objective of Naval Electronics has been to offer the
best possible products for TV and Radio reception at sea. Naval
began with omnidirectional antennas and is the world leader in this
field of technology today. Now, with an expanded product range, the
name Naval means much more than antennas. Naval operates in
more than 40 countries and has installations on thousands of
vessels all over the world.
All specifications stated are subject to change without notice.
Naval Electronics AB
Höjdrodergatan 18, SE-212 39 Malmö, Sweden
Tel. [phone]. Fax [phone]
E-mail:[e-mail] www.naval.se
Mark 20CA / 22CA
VHF/AIS Model
Technical manual
The Naval antennas is a range of omni-directional wide band antennas for maritime purposes.
They are based on a construction of loop antennas coupled to band amplifiers. The antennas
have a very high dynamic range. The antennas are made of ABS plastic and filled with
polyurethane foam. Mounting base in saltwater proof special alloy and bolts in stainless acid
proof steel.
The antennas is tested by “Det Norske Veritas” for the same approval as for radar equipment.
The advantages of a Mark antenna compared to a Yagi antenna are:
• Rigid, non-corrodible, maintenance free construction
• Small dimensions and easy to mount.
• Omni-directional, no adjustments.
• Replaceable amplifier.
• Integrated wavetraps VHF/AIS.

Antenna manual 3039 v1.06 07.02.01 page 2/4 © Copyright 2002 Naval Electronics AB
Antenna installed in this system
Mark 20CA
Mark 22CA
Please keep this manual in the amplifier cabinet or by the Radio Officer
For Service contact
NOTICE: Initial box after installation
Distributor
Name
Adress
Tel: Fax: Email:
Installation information
Schematic diagram Mk22CA
Component list Mk22CA
Installers signature:
Date:
Ships name:
AM
UHF
VHF
L1, L11
L2, L4, L6
L12, L13, L17, L18
L14, L16, L19
L20, L21, L22
L10, L23
L3, L5, L7, L8, L15, L24
L9
L25 0.5x4.5x11.5B
0.5x4x1.5TBE
0.5x4x2.5TBE
0.5x4.5x3.5TBE
0.5x4.5x6.5TBE
0.5x4.5x6.5TBE
401009600000
401009700000
401003300000
Coil
Coil 130001
130002
130003
130006
130006
Coil
Coil
Coil
Coil
Coil
Coil
Coil
130037

Antenna manual 3039 v1.06 07.02.01 page 3/4 © Copyright 2002 Naval Electronics AB
Block diagram Mark 22CA
Antenna unit
The antenna should be mounted as high as possible and placed away from funnels, radio communication
antennas and radars to avoid reflections and interferences.
The superior location is at the masthead, with free path in all directions. The antenna can be mounted on a
vibration proof mast, tube or mounting bracket.
The coaxial cable downlead, should be well protected and secured to the mast. Unload the downlead cable by
means of cable clamps and protect it from mechanical damage.
Avoid outdoor cable joints, but if necessary, make sure it is waterproof, by using self-vulcanizing rubber tape or
similar. Avoid excessive bending of the coaxial cable.
Factors, such as transmitting power, polarization, radiation angle and antenna height affect the received signal
strength.
Tune your Radio/TV-set and check sound/picture quality.
Note. In some ports severe reflections from buildings, cranes etc; can cause
distortion due to the nature of the
omni-directional receiving antenna. In some
areas, close to transmitters, overloading of
the amplifier and/or Radio/TV-set is
possible. Under these circumstances do not
interfere with the installation or the Radio/
TV-set.
Accessories
Mounting bracket in stainless steel 50 mm
with adjustable angle.
Length: 400 mm, Height: 215 m
4 pcs of M8x20 stainless steel hex bolt and
4 pcs of M8 locking nut in stainless steel included.
2 pcs of U-bolts with nut is local supply.
Order no: 201.351
See leaflet 3012

Antenna manual 3039 v1.06 07.02.01 page 4/4 © Copyright 2002 Naval Electronics AB
SILICON
Colour mark
Red: Mark 20CA
Yellow: Mark 22CA
**
*
Product Order No. Weight Standard Volume
package
Mark 20CA 201.001 5.5 kg 1 59 cdm
Mark 22CA 201.040 5.5 kg 1 59 cdm
Mounting bracket 201.351 1.5 kg 1 4.4 cdm
(see leaflet 3012)
All measures in mm .
Replaceable
amplifier
BNC-connectors
TV-antenna
Antennas are as standard
delivered with the amplifier
mounted and sealed with silicon
compound. The coaxial cable is
supplied with a female connector
which must be carefully
sealed after connecting the
replaceable amplifier. Compress
the rubber covers and secure with
vulcanizing silicon rubber tape.
(*local supply)
Changing the amplifier
Mounting of cable holder
Mechanical measurements
Trouble shooting
If the system is not working properly, please check the
following:
1. Proper supply voltage to powersupply
2. Connections
3. Output voltage from powersupply to antenna
(should be +15 V DC)
4. Antenna current (approx. 130-150 mA)
Antenna identification
(to be stated when claim is made)