OCXO Specification Part No. + Packaging: LFOCXO065520BULK Customer Part: Description A GPS disciplined OCXO (GPSDO) incorporating sync to a 1pps input and 1pps output with tight holdover stability achieved by using an adaptive algorithm. Current internal parameters of the algorithm are available to the user via Tx and Rx commands. Model IQCM-100 Model Issue number 2 Application Information (Reference Drawing): Connect the 1PPS output of your GPS system to the IQCM-100. A MCU can be used to monitor the working state of the IQCM-100. Working States (Reference Drawing): Run1: Fast track. Adjust the OCXO 10MHz output frequency quickly to track the 1PPS to 10MHz with 1PPS reference. Run2: Slow track. Adjust the OCXO 10MHz output frequency slowly when phase error is in the defined range. Holdover: No 1PPS input present an algorithm enables adaptive modelling of the frequency stability of an OCXO with Outline (mm) reference to the GPS timing signal. Free Run: Clock module powered up with no 1PPS input. Note1: The IQCM-100 should be left powered and running for 7 days minimum before operation to allow for the OCXO s internal drift to stabilise. Note2: The adaptive module algorithm can be built after two days operation with good GPS signal, however this data will be lost at power down. Note3: When State input (Pin 8) is set low the IQCM-100 will operate in Holdover mode regardless of the 1PPS signal condition. Output Data Word Example: PDP,00,0,F,1,-3095,32768.0000,32768.0000,000,000,00000. 0000,00000.0000,00000.0000,00000.0000,3-23,+000.0000,-00 00,www.iqdfp.com,1.1,2011-05-16*55 (See table for full description) Workflow Diagram Frequency Parameters Frequency 10.0MHz Operating Temperature Range -20.00 to 75.00C Accuracy (24-hour averaging when locked to 1PPS): 1E-12 Ageing (Vs and temperature constant, reference to T=25C, Vs = 5.0V and after 30 days operation): 0.2ppb per day, 10ppb per year Short Term Stability (tested after power for 1hr ref to 25C, 1s): 2E-11 max Sales Office Contact Details: UK: +44 (0)1460 270200 France: 0800 901 383 Email: info iqdfrequencyproducts.com Germany: 0800 1808 443 USA: +1.760.318.2824 Web: www.iqdfrequencyproducts.com Printed on 4 Sep 21 23:14 using Part Data Sheet V1.0018 Page 1 of 4OCXO Specification Part No. + Packaging: LFOCXO065520BULK Customer Part: Electrical Parameters 5.0V 5% Supply Voltage Note: Pins 3 to 11 and Pin 13 should not be subjected to a voltage greater 3.6V. If subjected to a higher voltage the processor will be damaged and the unit will not work correctly. 1PPS Reference Input, Pin 10 (50 test condition): Waveform: HCMOS ViH: 2.7V min ViL: 0.4V max Pulse Width: 10us min Stability: 200ns max State Input, Pin 8 (<5mA load): Lock: 2.7V min Unlock: 0.4V max Power Supply Details, Pin 12: Current Consumption: 2.5A during warm up, 1A steady state 25C Warm up time: 15mins AC Ripple: 50mV pk-pk max, 10Hz to 1MHz 12.0V supply voltage also available, please contact our sale office for details. Output Details HCMOS Output Compatibility 1PPS Reference Output, Pin 3 (15pF test condition): Waveform: HCMOS VoH: 2.7V min VoL: 0.4V max Pulse Width: 10s min Phase Accuracy <30mins after GNSS lock status: 200ns >30mins after GNSS lock status: 80ns Phase Accuracy RMS >24hrs after GNSS lock status: 25ns 10MHz RF Output Details, Pin 2: HCMOS Compatible, 15pF load (Sinewave 50 option available) VoH: 2.7V min VoL: 0.4V max Rise and Fall time: 8ns max Duty Cycle: 45/55% max Lock Status Indicator, Pin 5: Module Locked: 2.7V min Module Holdover: 0.4V max Module Locked means Working State is = Run2 Serial Interface (Pin 6 and Pin 7) UART VoL and ViL: 0.4V max VoH and ViH: 2.7V min Baud rate: 9600 Bits: 8 Parity: N Stop Bit: 1 Sales Office Contact Details: UK: +44 (0)1460 270200 France: 0800 901 383 Email: info iqdfrequencyproducts.com Germany: 0800 1808 443 USA: +1.760.318.2824 Web: www.iqdfrequencyproducts.com Printed on 4 Sep 21 23:14 using Part Data Sheet V1.0018 Page 2 of 4