User Manual

Marine Systems
Aviation Recorders
Page 3--3
Initial Issue165M1161--00
Aug. 23/10
AIS AtoN Installation
NOTE: This device complies with Part 1 5 of the FCC rules. Operation is sub-
ject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interfer-
ence received, including interference that may cause undesired oper-
ation. Modifications not expressly approved by the manufacturer
could void the user’s authority to operate the equipment under FCC
rules.
3.8. Install the VHF Antenna
Installation of a VHF antenna is as important to reliable communications as the
transceiver itself. Figure 3--1 illustrates a typical VHF antenna setup.
RG213RG214
Coaxial Cable
30 Meters
100 Feet
VHF Antenna
159 Mhz Center Frequency
<2.0 VSWR
6db Relative Gain
50 ohm
GPS
VHF
N Connector
Figure 3--1. VHF Antenna Setup
Purchase a VHF marine band antenna from an established source and follow all of
the manufacturer’s instructions with particular attention to the cable routing and con-
nector installation. When installing the VHF antenna, follow the cautions below.
F Place the antennas as high as practical and separate them as much as
possible.
F Place the antenna in an elevated position with a minimum of 2 meters of
clearance from all conductive material.
F Install the antenna away from large, vertical obstructions.
F Ensure that the antenna has a 360° line of sight to the horizon.
To install the VHF antenna, perform the following: