For example: Agilent E4440A or Anritsu 68369
Communications
Kenwood TMI TK2170
VHF 136-174MHz, UHF 440-480MHZ, UHF 400-430MHz Transceiver
Manufacturer: Kenwood TMI
Kenwood TMI TK3170
VHF 136-174MHz, UHF 440-480MHZ, UHF 400-430MHz Transceiver
Manufacturer: Kenwood TMI
Noisecom UFX-BER892/1850
UFX-BER892/1850 Programmable Precision C/N Generator
Manufacturer: Noisecom