For example: Agilent E4440A or Anritsu 68369
BK Precision Power Supply
BK Precision 1501
Dual-Voltage High-Current Battery Eliminator, 1.5V or 3V @3A
Manufacturer: BK Precision
BK Precision 1502
Heavy Duty DC Battery Eliminator, 1.5V,3V,4.5V,6V,12V / 1A
Manufacturer: BK Precision
BK Precision 1513
Power Supply/Battery Eliminator 3.3/4.5/6/7.5/9/12V, 1A
Manufacturer: BK Precision
BK Precision 1514
Power Supply/Battery Eliminator 3.3/4.5/6/7.5/9/12V, 3A
Manufacturer: BK Precision
BK Precision 1550
BK Precision 1550 Switching DC Power Supply with USB Charger Output 1-36V, 0-3A
Manufacturer: BK Precision