> Hi everyone, > > I'm having a problem with an iBOB-based spectrometer. The design is a > simple instrument used to measure neutral hydrogen for our > undergraduate radio lab course. The spectra are transmitted over the > 10/100 Mb ethernet using a modified main.c file where I read the > channels out of a shared BRAM, packetize them, and send the using UDP. > They are then grabbed using the software "gulp", which is similar to > tcpdump. > The problem is occasionally the iBOB seizes up. The "sanity LEDs" go > dark and no data is transmitted. After some about of time, the iBOB > comes back to life and things resume as normal. > > Does anyone have any idea what could cause the iBOB to "go dark" like > this?
Maybe it's overheating? Do you have a little fan right on the FPGA? We've found that is necessary, even in a "proper" case. We cut a hole in the lid and add a fan right over the chip. That, or a power supply regulator is overheating and shutting down. You might be able to diagnose that with your finger. (carefully, as they run somewhat hot anyway!) John > Thanks, > Laura >
