HP 438A / Agilent 438A Power Meter, Dual Channel HP-IB with 2x11730A Sensor Cables

SPECIFICATIONS:
Frequency Range: 100 kHz to 50 GHz (depending on power sensor used).
Power Range: -70 dBm to +44 dBm, sensor dependant.
Zeroing: automatic, +0.5% full scale on most sensitive range.
Display: 4 digit display (5 digits high res mode) with 20% over-range capability on all ranges. Annunciators to indicate measurement node, Cal Factor, offset value, fixed or automatic range and filter values, error conditions.