0.01 to 20 GHz Low Noise Synthesizer APSYN420

The APSYN420 is a wideband low phase-noise synthesizer operating up to 20 GHz. The module has a mHz frequency resolution uses a high-stability internal reference. The internal reference can be phase-locked to a programmable external reference. The module has a USB and LAN interface and can be controlled using SCPI 1999 command set. Operated with an external 6V DC supply, it consumes less than 10 watts.

APSYN420 Output Power

Output Power


  • Low phase noise
  • Fast switching
  • FM, Chirps, PULSE
  • Internal OCXO reference
  • Single 6V supply


  • ATE
  • LO for frequency converters
  • Telecom / SatCom
Range0.01 GHz to 20 GHz
Resolution 0.001 Hz
Accuracy 0.1 ppm
Output power level+23 dBm
Switching speed200 µs
SSB Phase noise at 1 GHz
at 1 kHz from carrier -118 dBc/Hz
at 20 kHz from carrier -128 dBc/Hz
ModulationFM, Pulse, PM
Remote controlEthernet, USB, SCPI