Siglent SAG1021I USB arb. waveform generator module for scopes
Triarchy VSG6G1C - USB Vector Signal Generator, 1 MHz to 6.1GHz | TEquipment
Amazon.com: LQE SG01 USB Signal Generator : Electronics
SynthUSB3 12.5MHz – 6.4 GHz RF Signal Generator ($339.00) : Saelig Online Store
0 12MHZ Digital channel DDS Signal Generator Arbitrary waveform generator USB TTL port PC Software for square wave Triangle wave|arbitrary waveform|arbitrary waveform generatordds signal generator - AliExpress
Hantek 6254BD Oscilloscope PC 1GSa/s 250MHz 4CH +25MHz Signal Generator USB PC | eBay
DC 0-10V 0/4-20mA Current Voltage Signal Generator, USB Power Supply Interface Analog Simulator for PLC and Panel Debugging, Device Testing,Flow Valve, Frequency Converter,: Amazon.com: Tools & Home Improvement
GW-INSTEK USG-0103 100MHz ~ 300MHz, USB RF Signal Generator - Altoo Aps