B&K PRECISION Signal Generator: DDS Function, 0.01 Hz to 12 MHz Sine, 0.01 Hz to 12 MHz Square, USB - 38W999|4014B - Grainger
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Professional Upgraded 15MHz DDS Signal Generator Counter, Seesii 2.4Inch LCD Display High Precision 200MSa/s Dual-Channel Arbitray Waveform Function Generator Frequency Meter: Amazon.com: Industrial & Scientific
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