Probably because the next question is "Is that negative or positive?" On the other hand I agree. If the ground is floating, and I should but I don't remember, they could list it as either.
On Wed, Apr 29, 2015 at 8:14 AM, Chuck McCown <[email protected]> wrote: > So, why not say "48 VDC" and leave it at that? If you add a polarity then > you also imply ground reference. > > -----Original Message----- From: Daniel White > Sent: Wednesday, April 29, 2015 6:13 AM > To: [email protected] > Subject: Re: [AFMUG] SAF Lumina power > > I'll confirm, Lumina is a floating ground. > > We say -48VDC since that is the telco standard (and some of our other > radios are -48VDC only). > > *************************************************************************** > Daniel White - Managing Director > SAF North America LLC > Cell: +1 (303) 746-3590 > [email protected] > Skype: danieldwhite > Social: LinkedIn > > *************************************************************************** > > -----Original Message----- >> From: Af [mailto:[email protected]] On Behalf Of George Skorup >> (Cyber Broadcasting) >> Sent: Tuesday, April 28, 2015 5:36 PM >> To: [email protected] >> Subject: [AFMUG] SAF Lumina power >> >> I thought all the SAF stuff was +48, but the CFIP Lumina FODU datasheet >> says >> -48? Is this the built-in DC-DC converter thing? I'm confused. >> > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > >
