CIR magnitude from DW1000

Hi all,

I was using dwm1002 anchor and dwm1003 tag for positioning. In order to get information about the channel, I retrieved the CIR data from the accumulator and plotted them. The figure showed good result, for example in a LOS scenario:

However, there is no information about what does the magnitude of these CIR data represent. Normally for CIR the y axis is the channel gain, in dB. Here, the magnitude of the highest peak is around 6000, which is hard to explain in dB.

Does anyone have idea about what is the unit for CIR data?