2-17
Installation
Chapter 2: Installation
98-144591-D
Antennas
In case a passive antenna for practical reasons cannot be installed, an active antenna may be used. It
is however, important to emphasize that an active antenna may decrease the receiving capabilities
through reduction in received signal level and receiver dynamic range.
It is of utmost importance for an active receiver antenna to work properly with the MF/HF system
that it be installed as high as at all possible with unobstructed horizontal view.
Example of possible MF/HF antenna placements with an active RX antenna.
Installation of any type of receiver antenna should be completed by verifying that the
receiving capability is adequate in applicable receiving modes (SSB, DSC, Telex).
In order to avoid any unnecessary decrease in receiving capabilities an active antenna used with the
SAILOR 6000B MF/HF systems should meet the following main requirements:
Electrical requirements
Operating frequency: 0.15 – 30 MHz
Output impedance: 50 Ω Ω
Noise fi gure: below 12 dB
Intermodulation: Reference signal 30 dBμV/m
Intermodulation level above 80 dBμV/m
Mechanical requirements
Length of the antenna element: 1.0 to 1.5m
Cobham have tested and recommends the AC Antennas KUM121 as a suitable choice.
To Next Page
Loading...
Need help?
General
