F1000b0 pages

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TIMING, TEST & MEASUREMENT

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Symmetricorrr

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1000B

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Ultra-Stable Crystal Oscillator

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KEY FEATURES

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Low Aging, 5.0E-11 Per Day

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Low Phase Noise, -160dBc at 10 kHz

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Independently Buffered Outputs

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Linearized Electronic

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Frequency Control

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Fast Warm-Up, 15 Minutes to 2.0E-8

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0°C to 55°C Operating

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Temperature Range

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Symmetncom's 1 000B achieves low aging

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rates by utilizing high-performance SC-cut

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quartz crystal resonators. The specified

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aging is reached within 30 days of continuous

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operation, and typically continues to improve.

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Several users report observed aging rates

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as low as 1 E-1 2 per day after years of

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continuous operation.

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A dewar-insulated oven provides superior

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temperature stability over the full temperature

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range. The maximum frequency change

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over the operating temperature range is <5E-9.

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An oven temperature indicator (10mV per

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degree K) is provided at the power connector.

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Linearized electronic frequency control

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allows the use of servo loop techniques for

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fine frequency tuning. Linearity is better

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than 5% over the specified tuning range.

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The 1 000B crystal oscillator meets the

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demands of a wide range of applications for

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military and industrial environments. The

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oscillator is found in precision frequency

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counters and synthesizers, GPS receivers,

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microwave multiplier chains, phase noise

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calibration test equipment, Stratum II

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telecommunications applications, radar and

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tactical communications systems, secure

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communications systems, satellite ground

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terminals and space flight systems.

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The oscillator circuit produces phase noise

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of -116 dBc at 1 Hz and -160 dBc at 10 kHz.

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Low noise, high isolation buffer amplifiers

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provide four independent outputs. The

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buffer amplifiers isolate outputs from load

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variations. An internal voltage regulator

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minimizes fluctuations due to power

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supply ripple.

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RF OUT fKjti J2

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Symmetricorrr

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1000B Ultra-Stable Crystal Oscillator

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