Configurations - U3841, U3851, U3872
Frequency Range - U3841: 9k~3GHz, U3851: 9k~8GHz, U3872: 9k~43GHz
RF Input - 2 channels (simultaneous phase measurement possible) 
Analysis Functions - power vs. time, frequency vs. time, phase vs. time, IQ vs. time, high-speed Fourier transform analysis, etc
Channel Balance - ±2.0dB
Phase Measurement - 15deg(CBW 100kHz/1msec per 1GHz)