For example: Agilent E4440A or Anritsu 68369
Splitters
Keysight / Agilent 5086-7446
TBR Bridge Splitter - 50 OHM, 3 GigaHertz Microcircuit

Manufacturer: Keysight / Agilent
Keysight / Agilent 5086-7464
Mod Splitter 2-7 Ghz Refurbished - 5086-6464

Manufacturer: Keysight / Agilent
MECA Electronics 808-2-1.500V (Qty 21)
8-way power splitter ( Bulk qty of 21 ).

Manufacturer: MECA Electronics