Waveform Frequency Sweep resolution, phase
In the waveform generator, with the sweep option, it appears I can type in any start and stop sine wave frequency up to 10 MHz. I am interested in using this as an FM chirp for ultrasound type applications. When I specify a given sweep time, say 1 ms, and start and stop of 500kHz to 1.5 MHz, what is the frequency resolution, (or at what time scale) does the frequency change? Secondly, is this done in a phase continuous manner?
In a related question, for the network analyzer, the output a
Hi @greig
The Wavegen sweep creates a linear continuous frequency sweep. For other type of sweeps use the FM (frequency modulation), select Modulation after the Enable checkbox.
On Analog Discovery the carrier waveform has 4k sample buffer (16k in 4th device configuration) of 14bit resolution. The modulations use 2k sample 9 bit resolution buffers.
The carrier buffer index increment is changed by FM continuously. With 100MHz DAC rate, a sweep from 500kHz to 1.5MHz will change the increm