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TWO_STAGE_VARIABLE_FREQUENCY_CRYSTAL_OSCILLATOR

2016-08-07 05:08  
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TWO_STAGE_VARIABLE_FREQUENCY_CRYSTAL_OSCILLATOR
Operates at 9.1 kc with long-term frequency stability of a few parts per million. Frequency can be pulled up to 5 cps off resonance by adjusting trimmer capacitor in series with crystal. Used in analog and digital systems to achieve calibration by deviating carrier frequency a small but accurately known amount.-G. A. Gedney and G. M. Davidson, Crystal Oscillator has Variable Frequency, Electronics, 31:7, p 118-119.