IQD has OCXO module for LTE & 4G base stations
IQD's new IQCM-100 GPS advanced OCXO module, designed for use in LTE and 4G base stations, achieves a holdover specification of 1.5ms over a period of 24 hours when locked to a 1PPS input from an external GPS receiver.
Incorporating an adaptive algorithm which has the ability to 'learn' from a stable GPS signal over a period of two days, the algorithm can be adjusted to allow for errors. Frequency is accurate to within ±1E-12 when locked to a 1PPS GPS signal and can compete with the performance of many atomic clock references.
Housed in a 65 x 65mm hermetically sealed thru-hole package, the IQCM-100 offers an HCMOS output, operating temperature range of –10 to 60°C, 5V supply voltage and a current input of 2mA during warm up.
The module incorporates a low drop out voltage regulator coupled to a highly stable internal OCXO which is conditioned by a D/A converter which in turn is fed from an ARM microcontroller. This controls an FPGA which provides the 1PPS output and is fed from the GPS signal.
