R&S®FK855C3 HF Antenna Tuning Unit
For matching R&S®Series 2000 HF radio family to antennas used in stationary and shipboard applications
- Tuning range 1.5 MHz to 30 MHz
- Fully automatic tuning
- 400 W CW and PEP at 100 % duty cycle
- 1000 W CW and PEP with restrictions
- Tuning of rod, whip and broadband antennas used in naval applications
- Low probability of intercept (LPI)
- Extremely short setting time
- Silent tuning over the entire frequency range from 1.5 MHz to 30 MHz
- Maintenance-free
- MTBF 12 000 h
- Continuous monitoring of operational status
- Rugged design
The R&S® FK855C3 matches rod and whip antennas, as they are used in naval applications, to the RF output of the Transceivers R&S® XK2500 and R&S® XK2900.
It can handle power up to 400 W CW and PEP at a 100 % duty cycle and up to 1000 W with restrictions. The R&S® FK855C3 operates in the frequencyrange from 1.5 MHz to 30 MHz, where it performs an antenna impedance transformation into 50 Ω in both the receive and transmit modes. Additionally, it provides preselection in the receive mode.
The R&S® FK855C3 has an extremely fast setting time for silent channels (switching time <5 ms and life >109 switching operations).
Owing to the silent tuning feature of the Transceivers R&S® XK2500 and R&S® XK2900, low probability of intercept (LPI) is enhanced.
Design
The rugged design of the R&S® FK855C3 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 circuit boards are equipped with ECM filters. For protection against overvoltage as produced by lightning strokes to the antenna, the R&S® FK855C3 output is provided with lightning protection.
