HP / Agilent 08157-90012 1987 HP 8157A Optical Attenuator Operating Manual.

Agilent HP Keysight 08158-90012 - 8158B Operating and Programming Manual

Agilent HP Keysight 08562-90086 - 8561A 8562A Operation and Programming Manual

Agilent HP Keysight 05350-90012 - 5350A, 5351A, 5352A Operating and Programming

Agilent HP Keysight 07562-90001 - 7562A Operating and Service Manual

Agilent HP Keysight 08118-90011 - 8118A Operating and Programming

Agilent HP Keysight 08175-90006 - 8175A Operating and Programming

Agilent HP Keysight 08161-90005 - 8161A Operating and Programming