I am using the AWG from Picoscope 3406B for generating different waveforms, generally containing linear slopes and fixed values (something like a trapezoid shape signal). I am using standard Picoscope 6 software, updated to the latest version. I can see that the output signal's number of samples can be configured to any value between 128 and 16382. The signal is read from a .csv file.
Is the AWG coherent from one generated period to another, no matter what the number of samples is ? My applications is highly dependent on this phase coherence.
I have noticed that I can select almost any output frequency for the AWG, which means that the wave can be stretched or shrink-ed on the time axis with any factor. Is there any relation between the wave number of samples and the output frequency, so that the generator is coherent ?
In other words, what is the output sampling frequency of the DAC inside? is it always 20MS/s, as stated in the datasheet, or can it be less?