The IQCM-110 series of GPS disciplined OXCOs from IQD incorporate an internal GPS receiver with a 1PPS output. In the event of the loss of the GPS signal and when coupled with an external aerial via the incorporated SMA connector, the 10 MHz OCXO will switch-in with a holdover capability of 1.5 μSeconds for a 24-hour period. This maintains lock until restoration of the reference signal. Operational between -20° and 75°C, the required power supply is 5V with standard HCMOS output. Current consumption is 2A maximum during warm-up, reducing to 1A once the steady-state condition is reached.
The OXCO is designed to incorporate an internal adaptive algorithm, enabling the module to learn the parameters of the GPS signal after a 2 day lock period and starting the holdover function in the event of signal failure. A built-in, internal alarm indicates lock failure and restoration of signal. A serial connection provides a more detailed interrogation of the device’s performance.
About the Author
Iliza Sokol
Associate Content Producer
Iliza joined the Penton Media group in 2013 after graduating from the Fashion Institute of Technology with a BS in Advertising and Marketing Communications. Prior to joining the staff, she worked at NYLON Magazine and a ghostwriting firm based in New York.