a low-noise, internal preamplifier for the full frequency range from 100 khz up to 50 ghz for the r&s®fsu, r&s®fsq and r&s®fsmr spectrum and signal analyzers significantly increases sensitivity especially at microwave frequencies - with major benefits for measurement work. please see the picture for a comparison of noise floors of an r&s®fsu50 with and without preamp switched on: at 50 ghz the r&s®fsu-b24 option improves the noise floor by nearly 30 db.
the new r&s®fsu-b24 option can be installed in all microwave models (≥ 26 ghz) of the r&s®fsu, r&s®fsq and r&s®fsmr series and can now be ordered. unlike the r&s® esu/esu-b24, there is only one option, and it fits all microwave models of the r&s®fsu/r&s®fsq/r&s®fsmr.