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 designthe rugged design of the r&s®fk2900m allows it to be operated continuously 24 hours a day.
bitethe 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 protectionall 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.