TOPCHANCES 138MHz~4.4GHz USB2.0/3.0 SMA Signal Source Signal Generator Spectrum Analyzer Network Analyzer Output frequency range 138MHz-4.4GHz ,Stepping: 1kHz Output power (for reference): 150M-3.2DBM; 250M-3.4DBM, 500M,-3.4DBM; 750M-2.8DBM, 1000M-3.4DBM 4. 1500M-3.6DBM; 2000M-4.0DBM; 2500M-2.8DBM; 3000M-1.8DBM; 3500M-3.6DBM 5. Spectrum of the input frequency range of 138M-4.4GHz ,Frequency Accuracy (after calibration): +-1k @ 1GHz Low-noise input signal amplitude:-70DBM @ 0.5G, Power: USB2.0, USB3.0 (+5 V/0.3A, it is best to pick USB3.0) ,Interface: USB2.0/ USB3.0, SMA