I just received a new U1620A scope from Agilent. After power up, the fan sounds noisy and erratic...like it is not balanced or scraping against some plastic. if I simply rotate the scope slightly, the noise gets worse or slightly better. It sounds like a faulty fan out of the box. Does anyone else hear a warbling pitch. I'm not talking about fan noise with consistent whirring but more like a rattling or grinding sound that doesn't exude Agilent quality. Just trying to figure out if this is normal or faulty before I send it back. I'd love to hear from other owners what they hear with their fan. I do have a call into the reseller and Agilent but no clear answers just yet. Thanks.