Rakon has added low noise 7x5mm XOs (cystal oscillators) and VCXOs (voltage controlled XOs) to its expanding product portfolio. The RXO7050M XO and RVX7050M VCXO are available from 2.048 to 200MHz in LVPECL (low-voltage positive emitter-coupled logic), LVDS and CMOS outputs. The use of HFF (high frequency fundamental) inverted mesa crystals eliminate the sub-harmonics associated with other high frequency technologies, claims the company.
The VCXO is optimised for low close-in phase noise and satisfies the stringent requirements for wireless RF communications such as LTE infrastructure as well as quadrature amplitude modulation which is less than -147dBc/Hz at 10kHz offset, for a 3.3V PECL output at 122.88MHz, or less than -115dBc/Hz at 100Hz offset, for a 3.3V CMOS output at 10MHz.
With RMS phase jitter of 0.1ps integrated over 12kHz to 20MHz, the oscillators are also suitable for wireline communications requiring high serial data rates such as synchronous optical networking, DOCSIS 3.0, GbE, and 1588v2 re-timing. Frequencies up to 800MHz are also available in LVPECL and LVDS outputs by combining the HFF with integrated x2 and x4 multiplier technology.
