54
2) CAUTION WHILE INSTALLING ANTENNA
The frequency range between Tx frequency and Rx frequency should be 4.6MHz when
used for DUPLEX method. However, it can be occurred when installation is improperly
made that the receiving sensitivity of other tranceiver is suppressed, and the distance
range may be shortened when used for long distance communication or DUPLEX
communication gets impossible.
Therefore please set up the antenna with following Cautions.
- Please use supplier’s type of Tx/Rx Antenna if possible, when you happened to use
other brand antenna, please use 50
Ω
with 150MHz band.
- Please use high quality antenna/power-cable than standard ones.
- Please set up at high location, if possible.
- Please set up at the location of more than 2M in vertical and 6M in horizontal apart from
the surrounding structure, if possible.
- Please keep the antenna away from another transmit antenna.
For example, keep 4 meters away from other VHF antenna.
- Please ensure that installation should be made where there avoids from mechanic
vibration and a rainstorm and connector parts must be waterproofed by using
waterproof tape.
- While installed number of antennas simultaneously, cooper cables should be isolated by
using steel pipe, if not, anyway keep the distance 30cm each other.
5.5 INTEGRATED WIRING
Please refer to installation drawing for interfacing machines each other.
1) Please use cable with SAMYUNG supply or the one, which can be endurable for
specified electric current for DC wiring.
2) Please tighten connectors of Tx/Rx antenna and speaker to prevent from ship’s rolling
and pitching.