R&S®FK859X1 1 kW HF Postselector
Whenever co-location requirements cannot be met by spatial separation of the antennas, the R&S® FK859X1 high-performance fi lter ensures interference-free transmission and reception under diffi cult HF conditions such as on board ships.
The HF Postselector R&S® FK859X1 is an automatically tunable fi lter. It is connected between the HF Transceiver R&S® XK2500/XK2900 and the corres ponding Antenna Tuning Unit R&S® FK855C3/FK2900M. The R&S® FK 859X1 suppresses broadband transmitter noise, harmonics and intermodulation products to ensure trouble- free operation of closely located receivers and enables simultaneous operation of several transmitters without mutual interference.
Tuning is digital by means of RF relays. The frequency information is derived from the control line to the ATU which is looped through the fi lter. The fi lter has a separate input for the receive antenna.
A switchover circuit bypasses the fi lter in the case of receive frequencies <1.5 MHz.
