This thread related to the USRP version 4.2, 10-2-2006. As you point out, the v3 boards have a smaller heatsink pad.
Best, Mike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brett Trotter Sent: Wednesday, March 07, 2007 5:52 AM To: Discuss-gnuradio@gnu.org Subject: [Discuss-gnuradio] RE: USRP + case = electrical short?? EXPLAINED Out of curiosity, what generation USRP do you have? My Rev 3 board has quite a lot of clearance on the TX-B side (1/4"ish- not measured) Weber, Michael J. (US SSA) wrote: > > I have identified the cause of the shorting issue I was experiencing > and thought I would share. The bottom-left corner mounting hole of the > USRP passes very close to the internal heat sink pad for the 3.3V > regulator; this pad is at 3.3V due to the regulator design (tab is > hot). Some of the green board mask had scraped off when the mounting > post for the Side B daughtercards was installed, which brought that > mounting post, and by extension the enclosure, to the 3.3V potential. > Photos of the board site are at http://www.likesgadgets.com/gr/ When > the SMA jumpers connected the ground to the case, a short occurred. ... _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
