Sorry , my english too poor!
I want to make a frequency response chart, this is a Graph of dB vs kHz of any sample like a filter.
Looking into picotech web page, it says:
"Built-in Signal Generator
The PicoScope 3204 can output a fixed 1 kHz square wave for compensating oscilloscope probes. The signal generators built into the PicoScope 3205 and 3206 can output sine, square and triangle waves up to 1 MHz in frequency. /////A useful feature is the sweep function that can be combined with the spectrum analyzer peak hold function to quickly test the bandwidth response of filters and amplifiers.////"
I hope this clarify my question.