R&S®Antenna tuning units

Frequency hopping capability

R&S®SECOM-H EPM (ECCM)

R&S®SECOM-H is a Rohde & Schwarz proprietary HF frequency hopping radiocommunications waveform similar to STANAG 4444. It is designed to operate in environments where a certain percentage of the hop set frequencies are blocked by intentional (i.e. jamming) or unintentional disturbances and in environments with severe Doppler spread and/or multipath delay.

Silent tuning function

The Rohde & Schwarz antenna tuning units (ATU) permit silent tuning over the entire frequency range from 1.5 MHz to 30 MHz. The advantage is low probability of intercept (LPI), since Rohde & Schwarz ATU frequency settings are made very quickly and with no RF power emissions. The Rohde & Schwarz ATUs must be connected to the antenna to “learn” its characteristics before using this feature. Learning occurs in a user-defined frequency range within the HF band.

EMC and overvoltage protection

All circuit boards are equipped with EMC filters. Rohde & Schwarz ATU outputs have lightning protection to protect against overvoltage from lightning strikes to the antenna. All antenna tuning units are tested to withstand arcs of 10 kV/10 kA.

Maintenance-free, rugged design

Rohde & Schwarz ATUs have a rugged design that allows for operation 24 hours a day.

BITE

Built-in test equipment (BITE)

Rohde & Schwarz ATUs continuously monitor the entire system to display deviations from the normal operating status on the control unit.