GPSDO module occupies sub-1x1-in. footprint
Test & Measurement World Staff - October 7, 2012
The LC_XO 10-MHz time and frequency reference from Jackson Labs Technologies is a highly integrated GPS-disciplined oscillator that can be soldered onto a customer PCB or plugged into a standard DIP socket with 100-mil pin spacing for optional retrofitting.
It packs a GPS receiver, power supplies, and an ovenized crystal oscillator into a 0.97×0.97×0.5-in. module.
Offered in OCXO (oven-controlled crystal oscillator) and TCXO (temperature-compensated crystal oscillator) versions, the LC-XO leverages a 50-channel GPS receiver with WAAS (wide area augmentation system) to discipline the oscillator to a frequency accuracy that is typically better than 0.5 ppb. According to the manufacturer, engineers can replace legacy OCXOs with a unit that uses significantly less power, has lower height, and provides atomic clock frequency accuracy. Users need only connect a GPS antenna signal and 3.3-V power supply for operation.
The LC_XO is a true disciplined oscillator, rather than an NCO (numerically controlled oscillator), and does not suffer from phase noise, jitter, frequency discontinuities, and spurs that GPS NCO products are typically burdened with. Phase noise of the TCXO version at 100 Hz is –132 dBc/Hz, while noise floor is –158 dBc/Hz and typical short-term average frequency accuracy and stability is better than 0.1 ppb when locked to a GPS signal.
More information: www.jackson-labs.com/assets/uploads/main/LC_XO_specsheet.pdf
Jackson Labs Technologies, www.jackson-labs.com