Comprising 3 models with respective carrier frequencies ranges of DC to 2.0/4.0/6.0 GHz, TSG4100A series can be upgraded in field to deliver more advanced vector and digital modulation capabilities. Series offers spur-free outputs with low phase noise of -113 dBc/Hz at 1 GHz, amplitude accuracy of <±0.4 dB at 1 GHz, 0 dBm CW signal from +16 dBm to -100 dBm level range, and frequency resolution of 1 Hz. OCXO time-base provides <±0.002 ppm temperature stability and <±0.05 ppm aging stability.