HV/LV jumper setting

Applications, development tools, FPGA, C, WEB
Post Reply
Posts: 15
Joined: Fri Jul 31, 2015 9:22 pm

HV/LV jumper setting

Post by igttgit » Mon May 30, 2016 3:18 pm

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

Nils Roos
Posts: 1441
Joined: Sat Jun 07, 2014 12:49 pm
Location: Königswinter

Re: HV/LV jumper setting

Post by Nils Roos » Mon May 30, 2016 10:57 pm

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

AA: 0x4c5f
BB: 0x2f38b

AA: 0x7d93
BB: 0x437c7
All in a day's work for Bicycle Repair Man

Posts: 12
Joined: Mon Feb 13, 2017 10:18 am

Re: HV/LV jumper setting

Post by mnordgard » Mon Jan 22, 2018 11:58 am

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

Site Admin
Posts: 230
Joined: Wed Mar 26, 2014 7:04 pm

Re: HV/LV jumper setting

Post by redpitaya » Wed Jan 24, 2018 12:59 pm


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

Post Reply
jadalnie klasyczne ekskluzywne meble wypoczynkowe do salonu ekskluzywne meble tapicerowane ekskluzywne meble do sypialni ekskluzywne meble włoskie

Who is online

Users browsing this forum: No registered users and 7 guests