Redpitaya Forum

Hello developers,
It is known the RP default scope utility has an HV/LV selector to correspond to the jumper settings.
Up to this point I have assumed that this was simply a gain setting, however it seems to be so much more.

When sampling a square wave signal with very high dv/dt I have noticed a "probe compensation"-like overshoot on the LV setting and almost complete elimination of this effect on the HV setting wit hthe scope utility.

My question is, presumably there is a filter on the FPGA to correct this response, what type of filter is this ?
If possible, could a link to the filter coefficients be posted ?

I am making my own acquisition utility and this is the last stumbling block

The old wiki has some information about the digital input filter (including the transfer function), and the parameters are as follows:

KK: 0xd9999a
PP: 0x2666

HV
AA: 0x4c5f
BB: 0x2f38b

LV
AA: 0x7d93
BB: 0x437c7

Now that the old wiki is not accessible, is there any other place one can find this information?

hi

this information was moved into a common document which can be found here.

Jumpers are explained there in the Fast analog IO paragraph.

kind regards

Red Pitaya team