What does this command mean?

Can someone tell me what iwave stands for?

[David K.]

Could you provide more context for where you are encountering it?

[Star Strider]

See: Creating and Downloading an IQ Waveform to a RF Signal Generator

[Walter Roberson]

Ah, if so then it would be the waveform for the In-phase (I) portion of an IQ (In-Phase and Quadrature) signal

https://www.allaboutcircuits.com/textbook/radio-frequency-analysis-design/radio-frequency-demodulation/understanding-i-q-signals-and-quadrature-modulation/

Answer 1

[the cyclist]

I'm guessing it's this.