Dual-frequency distortion predictions for the Cutler VLF array |
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| Authors: | Berg EC Roberts MA Simpson TL |
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| Institution: | California Univ., Irvine, CA, USA; |
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| Abstract: | The VLF transmitting system in Cutler, ME currently broadcasts at one frequency through a two-element antenna system. This study investigates simultaneous operation at 24.0 and 17.8 kHz. Detailed nonlinear PSPICE models were generated for the system including the amplifier triodes, saturable dynamic-tuning reactors, and the closely-coupled antenna elements. The predicted behavior is in close agreement with available observations. Upper limits are placed on harmonic content, <-59.8 dBc, and intermodulation distortion, <-78 dBc. |
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