OCXO Specification Part No. + Packaging: LFOCXO070939Bulk Customer Part: Description A GPS disciplined OCXO incorporating sync to a 1pps input and 1pps output with 1.5s 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-200 Model Issue number 3 Application Information (Reference Drawing): Connect the 1PPS output of your GPS system to the IQCM-200. A MCU can be used to monitor the working state of the IQCM-200. 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 reference to the GPS timing signal. Outline (mm) Free Run: Clock module powered up with no 1PPS input. Note1: The IQCM-200 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-200 will operate in Holdover mode regardless of the 1PPS signal condition. Output Data Word Example: PDP,00,0,F,Q,-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 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 23:20 using Part Data Sheet V1.0018 Page 1 of 5OCXO Specification Part No. + Packaging: LFOCXO070939Bulk Customer Part: Frequency Parameters Frequency 10.0MHz Operating Temperature Range -10.00 to 70.00C 10MHz RF Output Details, Pin 14: 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 Accuracy (24-hour averaging when locked to 1PPS): 1E-12 Short Term Stability (tested after power for 1hr ref to 25C, 1s, using PN9000 test equipment): 2E-11 max Ageing (Vs and temperature constant, reference to T=25C, Vs = 5.0V and after 30 days operation): 0.2ppb per day, 10ppb per year 24Hrs Holdover Capability Reference 7 days powered on, 2 days GPS lock Temperature varied <1C/min within operating temperature range Total temperature change Holdover capability T<2C 1.5s Note: Other options available on request Electrical Parameters Supply Voltage 5.0V 5% Note: Pins 4 to 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 (15pF test condition): Waveform: HCMOS ViH: 2.7V min ViL: 0.4V max Pulse Width: 10us min State Input, Pin 8 (<5mA load): Lock: 2.7V min Unlock: 0.5V max Power Supply Details, Pin 3: Supply Voltage: 5.0V 5% Current Consumption: 1.4A during warm up, 600mA steady state 25C AC Ripple: 50mV pk-pk max, 10Hz to 1MHz 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 23:20 using Part Data Sheet V1.0018 Page 2 of 5