R&S®FK2900M HF Antenna Tuning Unit

For stationary and shipboard applications

  • Overview

Key Facts

The R&S®FK2900M matches the amplifier outputs of the transceivers to rod and wire antennas. It is designed for stationary or shipboard applications.

Brief Description

  • Silent tuning
  • Rugged design
  • BITE
  • ECM and overvoltage protection

Key Facts

  • The R&S®FK2900M matches the amplifier outputs of the transceivers to rod and wire antennas. It is designed for stationary or shipboard applications.

  • Main features
    • Silent tuning over the entire frequency range from 1.5 MHz to 30 MHz
    • Tuning of all rod antennas from 10.5 m to 12 m
    • Tuning of long-wire antennas
    • 1000 W CW and PEP at 100 % duty cycle
    • Once the tuning data for these frequencies is known and stored, the ATU setting time is < 40 ms
    • If the required VSWR (< 1.5:1) is not attained, the ATU can be retuned in < 200 ms

Brief Description

Silent tuning

The R&S®FK2900M offers silent tuning over the entire frequency range from 1.5 MHz to 30 MHz. Before this feature can be used for an application, the ATU must be connected to an antenna to “learn” its characteristic. Learning takes place in a user-defined frequency range in the HF band (1.5 MHz to 30 MHz).

The ATU “learns” the antenna characteristic by collecting tuning data for a maximum of 1500 predefined frequencies. After the tuning data for these frequencies is known and stored, the ATU setting time is less than 40 ms. The advantage for the user is "Low Probability of Intercept" (LPI), since ATU frequency setting is performed very quickly and without any emission of RF power.

Rugged design

The rugged design of the R&S®FK2900M allows it to be operated continuously 24 hours a day.

BITE

The ATU is included in the continuous monitoring of the entire system so that deviations from the normal operating status are displayed on the control unit.

ECM and overvoltage protection

All internal modules are equipped with ECM filters. For protection against overvoltage as produced by lightning strokes, the R&S®FK2900M output is provided with lightning protection.

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