The Keysight PNA-L series of network analyzers is the recommended replacement products. The PNA-L Series covers the frequency range of 300 kHz to 50 GHz, and is available in 2 and 4 port models.
Frequency: 0.3 to 20000 MHz
Max Dynamic Range: 115 dBm
Output Power: 7 dBm
Inputs: 2
Frequency: 0.00001 to 500 MHz
Max Dynamic Range: 0 dBm
Output Power: 0 dBm
Inputs: 2
Frequency: 0.3 to 50000 MHz
Max Dynamic Range: 122 dBm
Output Power: 10 dBm
Inputs: 2