DS500 Digitizer

Description

The Diakon DS500 is a high‐speed 8‐bit resolution digitizer board with two channels capable of sampling up to 1.5 GSPS per channel or up to 3.0 GSPS for a single channel.

The DS500 is designed to maximize the quality of the captured signal in terms of signal‐to‐noise ratio (SNR) and spurious‐free dynamic range (SFDR) over a wide frequency range. The two analog input channels are DC coupled with a frequency range from DC to 1.0 GHz.

An onboard synthesized clock allows for the ADC sampling rate to be set to any value from 200 MHz to 1,500 MHz. The synthesizer clock is locked to a 10 MHz reference clock. The reference clock may be selected from the internal reference or an externally supplied 10 MHz reference clock. The internal reference clock is accurate to better than 5 PPM. This sets the ADC clock accuracy to also be within 5 PPM.

In data acquisition mode, two triggering modes are available: post/pre trigger, segmented or both. In the post/pre trigger mode, following the detection of a trigger signal, all of the active memory is filled. In the segmented mode a separate trigger signal is required to successively fill each memory segment until all of the active memory is filled.

There are two types of trigger sources: internal or external. When the external trigger is selected then a trigger event is defined by an external pulse delivered to the DS500 via the external trigger connector. The DS500 can also be configured to use either of the internal channel inputs to internally trigger off the data. When using an internal trigger source, a trigger event occurs when the channel's ADC value crosses a particular trigger level in a particular direction.