rob_the_inductor
Newbie level 3
Digital Function Generator : how does it work ?
Hi,
I'm looking for a better understanting of the principles of digital function generator.
Let's take for example specs from a known device (SDG5000)
-Up to 160MHz Output Frequency
-500MSa/S Sampling Rate
-14-bit Vertical Resolution
-Memory depths of 512kpts for CH2 and 16kpts for CH1
As far as I understood, this device can generate periodic signal up to 160MHz.
Sampling rate is related to the number of samples per period, for instance a 1MHz signal will be described 500 points in that case.The more the frequency increases the more the number of samples decreases
A sample is composed of 14 bits ans is stored in its relative memory (let's take the bigger one 512kpts).
I have trouble understanding when the frequency is as low as the number of samples is higher than the number of samples stored in the memory. For instance at 1Hz, you need to load 500M samples to respect the specs but only 512k are awailable.
Thank you for help
Hi,
I'm looking for a better understanting of the principles of digital function generator.
Let's take for example specs from a known device (SDG5000)
-Up to 160MHz Output Frequency
-500MSa/S Sampling Rate
-14-bit Vertical Resolution
-Memory depths of 512kpts for CH2 and 16kpts for CH1
As far as I understood, this device can generate periodic signal up to 160MHz.
Sampling rate is related to the number of samples per period, for instance a 1MHz signal will be described 500 points in that case.The more the frequency increases the more the number of samples decreases
A sample is composed of 14 bits ans is stored in its relative memory (let's take the bigger one 512kpts).
I have trouble understanding when the frequency is as low as the number of samples is higher than the number of samples stored in the memory. For instance at 1Hz, you need to load 500M samples to respect the specs but only 512k are awailable.
Thank you for help