For example: Agilent E4440A or Anritsu 68369
DC Power Supplies
Extech Instruments 382275
600W Switching Mode DC Power Supply (120V)
Manufacturer: Extech Instruments
Keysight / Agilent 6105A
DC Power Supply, 100 V/0.4 A, 50 V/0.8 A, 40 W
Manufacturer: Keysight / Agilent