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Best Choice Mingzhe 
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EMSea XR2206 High Precision Function Signal Generator DIY Kit with User Manual Sine/Triangle/Square Wave Adjustable Freq [DIY Kit] : XR2206 high precision signal generator DIY parts, need to be assembled by yourself.Gugxiom 
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OWON DGE2070 Arbitrary Waveform Generator AWG 14bits Vertical Resolution 2CH 70MHz 300MSa/s 3.6inch LCD Digital Signal G 1. Max 300MSa/s Sample rate，Vertical resolution 1μHz.NYBGBAR 
JDS6600 15MHz-60MHz DDS Signal Generator Function CNC Arbitral Waveform Pulse Meter (60MHz) JDS6600 series dual channel function signal generator combines multiple functions into one, such as function signal geneKcolly 
Kcolly FY8300S-20M 20 3 Channel Function Arbitrary Waveform Signal Generator 4 TTL Level Outputs DC Bias Function Digita [Versatile Functionality] With 98 groups of functions/any waveforms, including preset and custom options, this generatorAribrnten 
Aribrnten FG-200 DDS Function Signal Generator Frequency Counter 0.01Hz - 500KHz Signal Source Sine+Square+ Waveform Compact size complete functions, simple operation, easy to carry. 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