Agilent Keysight 53148A / 001 / 002 Portable Frequency Counter / Power Meter / DVM. 10 Hz to 26.5 GHz. Includes Option 001 Oven Timebase and option 002 internal rechargeable battery. Power Sensor Sold Separately.
EIP 548A - Microwave Frequency Counter. 10 Hz to 26.5 GHZ. Includes option 05 (best available timebase), and option 06 (frequency extension capability).
EIP 548B - 10 Hz to 26.5 GHz Microwave Frequency Counter. Includes option 05 (best available timebase), and option 06 (frequency extension capability).