Zero Suppression

One of Ndigo5G’s key features is on-board zero suppression to reduce PCIe bus load.

Only data that passes specifications predefined by the user is transmitted.

This guide refers to transmitted waveform data as packets.

A packet contains the waveform data and a timestamp giving the absolute time (i.e., the time since start of data acquisition) of the packet’s last sample.

Figure 10 shows a simple example: Data is written to the PC only if values exceed a specified threshold.

Expanding on that, Ndigo5G’s zero suppression can be used to realize much more complex scenarios.

Figure 10 Simple zero suppression: Only data with values above a threshold are streamed to the PC.