Saelig Introduces Economical 0.65-20 GHz Fast-Switching Synthesizer

Saelig Company, Inc. has introduced the APSYN420B – an economical, wideband, fast-switching, low phase-noise 0.65GHz to 20 GHz frequency synthesizer with a remarkable resolution of 0.001Hz and phase resolution of 0.1deg, providing a nominal output power of +13 dBm into 50 ohms. The module features a high-stability internal reference which can be phase-locked to a user-configurable external reference or used in a master-slave configuration for highest phase coherence. The APSYN420B offers USB and LAN interfaces and can be controlled using an SCPI 1999 command set.

The APSYN420B features very low phase noise, fast switching (settling time typically 20uS with a frequency update rate of 200uS), low phase noise, and an internal OCXO reference that can be configured for highest phase coherence between multiple sources. Powered from an external 6V DC supply, it consumes less than 10 watts.

Applications for the APSYN420B include: ATE, local frequency converter source, satellite and other telecommunications needs, etc.

For detailed specifications, free technical assistance, or additional information, please contact 1-888-7SAELIG, via email:, or visit