Master Reference Oscillator (MRO) SPECTRUM MICROWAVE Spectrum Microwave’s line of Master reference oscillators (MROs) is vibration hardened ultra low noise crystal oscillators intended for an airborne military application. Features Phase Noise (60 MHz – 120 MHz output frequency) SC cut crystal for stability and low noise Ovenized oscillator has a less than 10-minute warm-up to achieve 0.5 PPM accuracy Integrated doublers (x2 and x4), amplifier, built in power test, and band pass filter circuits TTL oven ready indicator Internal voltage regulation to minimize pushing Low resonance (<10 Hz) vibration isolation system to minimize the effects of vibration on phase noise performance Typical Performance Characteristics Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 – 480 MHz Output power level . . . . . . . . . . . . . . . . . . . . . . . . . . . +20 dBm Aging . . . . . . . . . . ±1 PPM per year after 30 days operation Harmonics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 dBc Spurious . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -90 dBc max in a ±2 MHz B.W. about 160 MHz -75 dBc from ±2 to ±20 MHz about 160 MHz Temperature stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5 PPM , -20 to +60° C, REF +25° C Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 6.75" x 5" x 2.688" Connector RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMA female Connector E-tune . . . . . . . . . . . . . . . . . . . . . . . . . . SMA Female DC and Bits . . . . . . . . . . . . . . . . . . . . Male 9 pin D connector Packaging . . . . . . . . . . .Machined aluminum housing Nickel ................. plated per MIL-C-26074 DC power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V DC current . . . . . . . . . . . . . . . . . . . . . . 1.5 A during warm up ............................ 0.5 A after warm up VSWR . . . . . . . . 1.5:1 max @160 MHz into a 50 ohm system Offset Freq Hz 10 100 1000 10K 20K 1Meg Static Noise dBc/Hz -100 -131 -158 -173 -176 -176 Dynamic Noise dBc/Hz -84 -116 -152 -172 -176 -176 Phase Noise (120 MHz – 240 MHz output frequency) Offset Freq Hz 10 100 1000 10K 20K 1Meg Static Noise dBc/Hz -95 -125 -152 -167 -170 -170 Dynamic Noise dBc/Hz -78 -110 -146 -166 -170 -170 Phase Noise (240 MHz – 480 MHz output frequency) Offset Freq Hz 10 100 1000 10K 20K 1Meg Static Noise dBc/Hz -89 -119 -146 -161 -164 -164 Dynamic Noise dBc/Hz -72 -104 -140 -160 -164 -164 CERTIFIED SPECTRUM MICROWAVE • 2707 Black Lake Place • Philadelphia, PA 19154 • Phone: (215) 464-4000 • Fax: (215) 464-4001 www.SpectrumMicrowave.com