The SIGLENT SDG1032X is siglent's latest addition to an already powerful line of arb/function generators. With the ability to offset the phase between CH1 and CH2, numerous modulation types, a harmonics generation mode, this 30 MHz generator can generate square waves to 30 MHz.
https://www.youtube.com/watch?v=49d9UM9AHUs&t=26s
https://www.youtube.com/watch?v=FVrDfcaIpeo