OCXO Specification Part No. + Packaging: LFOCXO065520BULK Description A GPS disciplined OCXO 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 1 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 reference to the GPS timing signal. Outline (mm) 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) Frequency Parameters Frequency 10.0MHz Operating Temperature Range -20.00 to 75.00C 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 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 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 15 Mar 17 9:56 using Part Data Sheet V1.00014 Page 1 of 4OCXO Specification Part No. + Packaging: LFOCXO065520BULK Electrical Parameters 5.0V 5% Supply Voltage 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: Supply Voltage: 5.0V 5% 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 Output Compatability HCMOS 1PPS Reference Output, Pin 3 (15pF test condition): Waveform: HCMOS VoH: 2.7V min VoL: 0.4V max Pulse Width: 10s min Phase Accuracy <30min after GNSS lock status: 200ns >30min after GNSS lock status: 80ns Phase Accuracy RMS >24hrs after GNSS lock status: 25ns Lock Status Indicator, Pin 5: Module Locked: 2.7V min Module Holdover: 0.4V max Module Locked means Working State is = Run2 Serial Interface (pin6 and pin7) UART VoL and ViL: 0.4V max VoH and ViH: 2.7V min Baud rate: 9600 Bits: 8 Parity: N Stop Bit: 1 Noise Parameters Phase Noise on 10MHz RF output signal (dBm/Hz) Offset Typical Max 10Hz -125 -120 100Hz -140 -135 1kHz -148 -143 10kHz -152 -147 100kHz -155 -150 1MHz -155 -150 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 15 Mar 17 9:56 using Part Data Sheet V1.00014 Page 2 of 4