Agilent/HP E4404B Portable Spectrum Analyzer, 9kHz to 6.7 GHz frequency range, Less than or equal to -116dBm best case display average noise level at 1kHz RBW, 1kHz min. resolution bandwidth, Field rugged portability, 28 updates/sec measurement speed; One button measurements such as ACP, occupied BW, emissions BW. channel power, 10peaks table and harmonic distortion provide faster more repeatable results; Floppy disk drive, 16.8cm high-resolution color display, GPIB and RS-232 interfaces.