High-stability ovened crystal oscillator

August 06, 2013 // By Graham Prophet
A surface-mount OCXO from Fox Electronics holds tight stabilities; the FTM Series is suited to application as the timing reference for network synchronisation.

The oscillator provides a standard stability of ±10 ppb across a set of standard frequencies in the 5 MHz to 40 MHz range with temperatures from -40C to +85C and stabilities as tight as ±5 ppb available, depending upon operating conditions. The FTM also has a frequency control pin that allows a minimum of ±0.7 ppm of frequency adjustment.

The SMD OCXO offers specifications suitable for communication equipment, including base stations, radio network controllers, wireless backhaul equipment and routers as well as gateways, PON (Passive Optical Network), DSLAM (Digital Subscriber Line Access Multiplexer), multi-service switching platform and transmission equipment.

It has 3.3 Vdc supply voltage, with 5 Vdc as an option, and operates at a maximum of 1.2 W at 25C. Output load is typically 15 pF and long term ageing over 10 years is 0.4 ppm for all effects. Each OCXO weighs only 5.7 g and comes with a gold (Au) termination finish.

Fox Electronics; www.foxonline.com/ocxoindx.htm