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check for numbers properly
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@ -51,7 +51,7 @@ Envelope.prototype.draw = function(visible_range){
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var from = center_freq + this.demodulator.offset_frequency;
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var from = center_freq + this.demodulator.offset_frequency;
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var to = center_freq + this.demodulator.offset_frequency;
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var to = center_freq + this.demodulator.offset_frequency;
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var fake_indicator = !this.demodulator.low_cut || !this.demodulator.high_cut;
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var fake_indicator = typeof(this.demodulator.low_cut) !== 'number' || typeof(this.demodulator.high_cut) !== 'number';
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if (fake_indicator) {
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if (fake_indicator) {
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// fake values just so that the tuning indicator shows up
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// fake values just so that the tuning indicator shows up
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var fixedBw = 100000
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var fixedBw = 100000
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