I was lured by an ad for a Hantek DS4102C, that combines a DSO and a DDS. I thought it would be handy for quick basic work like frequency response eval.
The DDS performance seemed adequate, with 0.1% midrange THD.
I asked them, before buying, if it was capable of producing a Bode plot, to which they answered positively.
It turns out it is impossible to change the generator frequency while the DSO is operating.
In order to change frequency, one has to exit the Measure mode, enter the DDS mode and change the frequency. I talked with their service guy, he told me that it is just not possible to do what I wanted!
He finally suggested I use a separate generator (!), adding that the DSO was capable of displaying the incoming frequency (!!).
Of course, there is no way to produce a Bode plot, which seemed to me like an easy addition since the hardware is already there and it should take only an additional software piece.
What are these people thinking?
The DDS performance seemed adequate, with 0.1% midrange THD.
I asked them, before buying, if it was capable of producing a Bode plot, to which they answered positively.
It turns out it is impossible to change the generator frequency while the DSO is operating.
In order to change frequency, one has to exit the Measure mode, enter the DDS mode and change the frequency. I talked with their service guy, he told me that it is just not possible to do what I wanted!
He finally suggested I use a separate generator (!), adding that the DSO was capable of displaying the incoming frequency (!!).
Of course, there is no way to produce a Bode plot, which seemed to me like an easy addition since the hardware is already there and it should take only an additional software piece.
What are these people thinking?