USA --Spectracom: spectracom
GPS/ Glonass / Beidou/ Galileo /Qzss / IRNSS 1/8/16/32/48/64 channels , L1/L2/L5/L6 bands supported
衛星訊號模擬器
USA--Vaunix Lab Brick: vanunix
USB type Signal Generator 50MHz to 20GHZ /63db USB type Digital attenuator
信號產生器/衰減器