Hi All, I am working with the Phil Lubin's Deepspace group at UCSB on a ROACH based spectrometer. I have been testing tutorial 3 using a 1 Volt peak to peak sine wave with a frequency of 20 MHz. When set the gain to a reasonable level it outputs a sharp peak in a consistent location, but the amplitude of the peak changes quite a bit (on the order of 10%) between accumulations. I just wanted to know if this was normal, as it makes calibration irritating to say the least. I am using a revision A ADC2x1000-8.
Thank you for your time, Luke Madden
