- Agilent-Keysight E4428C-506- Fabricante: Agilent - Keysight
- Modelo: E4428C-506
 Lake Mary, Florida
- Agilent-Keysight E4428C- Fabricante: Agilent - Keysight
- Modelo: E4428C
 - Unb high output power with mechanical attenuator fabricantes: Agilent-Keysight Modelo Lake Mary, Florida
 - Keysight Technologies (anteriormente Agilent) KT-E4428C-503/UNB- Fabricante: Agilent - Keysight
- Modelo: E4428C-503
 Bekkestua, Noruega

