MROHR RAKON | Alldatasheet

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MASTER REFERENCE OSCILLATOR | EQUIPMENT SERIES Issue: A0, 51003287.110, November 30, 2023 Specifications are subject to change without notice. Copyright © 2023 Rakon Limited. All rights reserved. Page 1 of 3 Contact Us Master Reference Oscillator – High Reliability The MRO HR (Master Reference Oscillator High Reliability) is a modular space equipment that generates and distributes highly stable and reliable frequency signals. It is specifically designed for telecommunication, navigation and earth observation satellites where frequency stability and ultra-low phase noise are crucial. The MRO HR is particularly suited to GEO missions with a lifetime of up to 20 years. It achieves a highly stable long-term frequency stability down to ±100 ppb over 20 years. Up to 48 outputs are available from 5 to 200 MHz, with the output level adjustable per port. The architecture has no single point of failure and offers a reliability of 99.99% thanks to its 3:1 redundancy. The unit can easily be connected to a Master Local Oscillator to create a Frequency Generation Unit. The current baseline includes integrated DC/DC converter s which allow the clock to be powered directly from th e primary power of the satellite, ON & OFF TM/TC and one block of 8 outputs @ 10 or 100 MHz. Custom solutions are available on request (e.g., synchronisation to a PPS signal, different stability class oscillators, digital electronic frequency control, or additional outputs). All components are selected according to ECSS QST60 Class 1 and materials according to ECSS-QST70. Modules and Block Diagram Key Features 240 x 270 x 240 mm  Output frequency: 5 to 200 MHz  3 classes of overall frequency stability: STD: ±2.5 ppm for 20 years PERF: ±1 ppm for 20 years USTAB: ±0.1 ppm for 20 years  Typical phase noise @10 MHz: -105 dBc/Hz (@ 1 Hz) -133 dBc/Hz (@ 10 Hz) -145 dBc/Hz (@ 100 Hz) -150 dBc/Hz (@ 1 kHz) -155 dBc/Hz (@ 10 kHz)  Up to 16 outputs  Output power: -7 to 5 dBm  Isolation between 2 outputs: > 50 dB  Redundancy 3:1  Up to 48 outputs  Power bus: 100 V  Communication interface: low level Command  Mass (8 outputs): 7 kg  Power (8 outputs): 16 W steady-state  Connector: DSUB; microD, SMA

MASTER REFERENCE OSCILLATOR | EQUIPMENT SERIES Issue: A0, 51003287.110, November 30, 2023 Specifications are subject to change without notice. Copyright © 2023 Rakon Limited. All rights reserved. Page 2 of 3 Contact Us Environment Conditions Parameter Condition / Remarks Min. Typ. Max. Unit Operating temperature (TOp) FvT: ±5 ppb -40 70 °C Non-operating temperature Qualification -55 85 °C Nominal thermal conductance between baseplate and caloducs

1130 W/m²/K

Thermal flux Density over Baseplate 5 W/cm² Random vibration Out of plane In Plane 10 Hz: 0.03

50 Hz: 1 g²/Hz

90 Hz: 1 g²/Hz

100 Hz: 1.5 g²/Hz 300 Hz: 1.5 g²/Hz 510 Hz: 0.65 g²/Hz 772 Hz: 0.05 g²/Hz 2000 Hz: 0.05 g²/Hz Overall level = 26.3 gRMS 10 Hz: 0.006 g²/Hz 80 Hz: 0.1 g²/Hz 600 Hz: 0.1 g²/Hz 2000 Hz: 0.05 g²/Hz Overall level = 12.2 gRMS Sine vibration Any plane 5 – 26 Hz: ± 10 mm 26 – 100 Hz: ± 30 g Mechanical shock (SRC – Q = 10) Any plane

100 Hz: 30 g

500 Hz: 2000 g

10000: 2000 g Radiation MEO and GEO Lifetime 20 years Typical Performance Characteristics Parameter Condition / Remarks Min. Typ. Max. Unit Nominal frequency 10 MHz Steady state input current power Vacuum @ +20°C 16 W Warm up supply power Vacuum, EOL @ -30°C 28 W Overall frequency drift EOL (20 years) ±100 ppb Short-term stability ADEV @1-10s 5E-12 Output waveform Sine Output power level EOL (20 years) / adjusted by port -7 +5 dBm Harmonics level -50 dBc Spurious level -100 dBc Phase noise @ 10 MHz

1 Hz offset

10 Hz offset

100 Hz offset

-105 -133 -145 -150 -155 dBc/Hz

MASTER REFERENCE OSCILLATOR | EQUIPMENT SERIES Issue: A0, 51003287.110, November 30, 2023 Specifications are subject to change without notice. Copyright © 2023 Rakon Limited. All rights reserved. Page 3 of 3 Contact Us Physical Parameters (8 outputs @ 10MHz and 10-9 stability class reference) Parameter Condition / Remarks Mass 7 kg Package W x L x H: 240 x 270 x 240 mm Power Steady state: 16 W; Warm-up (2 MROs warming up at the same time): 28 W Model outline