I think most of them derive from the MTBF of the various components. Jeff Broadwick ConVergence Technologies, Inc. 312-205-2519 Office 574-220-7826 Cell [email protected]
> On Aug 26, 2017, at 11:30 AM, Mike Hammett <[email protected]> wrote: > > I've never put stock in those numbers. > > > > ----- > Mike Hammett > Intelligent Computing Solutions > > Midwest Internet Exchange > > The Brothers WISP > > > > > From: "Kurt Fankhauser" <[email protected]> > To: [email protected] > Sent: Saturday, August 26, 2017 10:29:44 AM > Subject: [AFMUG] Manufacturer MTBF ratings and actual lifespan of product > > Where do these MTBF ratings come from by radio manufacturers? Are they just > made up numbers the manufacturer "hopes" that the product can achieve or is > actual testing done to get to these numbers? I thought i seen a radio once > with a 90 year MTBF rating. How they hell can they determine that? The > components in the radio didn't even exist 90 years ago. > > If a radio manufacture states in the spec sheets that the radio has a 40 year > MTBF rating but then also admits that after 4 years expect to have problems > due to a design flaw, what does that mean? Is the expected MTBF rating only > good in a "lab environment" under "ideal conditions"? > > Seems to me the MTBF is just marketing fluff and actually doesn't mean > crap.... >
