Re: [casper] KatADC impedance values

2016-02-22 Thread Dan Werthimer
hi james, as far as I know, all the casper adc board inputs are 50 ohms, except for the differential input version of the adc16 board, which has 100 ohm differential inputs. several of the adc boards are not well terminated (they aren't 50 ohms at all frequencies...), especially the earlier board

[casper] KatADC impedance values

2016-02-22 Thread James Smith
Hi all, Is there any reason to believe that the input on the KatADC board (or any ADC board which we might end up using) is not a 50-ohm? How would one go about determining that? The wiki says nothing about its VSWR or related information. Any thoughts would be appreciated. Regards, James