Hi I've never bothered to dig into the pps issues on the box. I have just been using the RF output.
Bob On Feb 9, 2013, at 8:22 PM, EB4APL <eb4...@cembreros.jazztel.es> wrote: > Bob, > > Thank you for your response. I already have it working with a 48 V floating > supply, as per the vendor info (Bob Mokia, fluke.l), but I found in the > referred documentation that maybe I could use a 24 V power supply if I need > it. > I bought only the PCB, not the original enclosure (too heavy) so I don't have > any power input label. I removed the PCB from my box, traced the circuit > somewhat and I realized that this is not a dual voltage unit, but a 48 V one. > The 24 V units has the input polarity reversed on the same connector pins. > Have you found in your units any means of getting 1 PPS instead the current > 1/2 PPS? > > Best regards, > Ignacio EB4APL > > > On 09/02/2013 17:50, Bob Camp wrote: >> Hi >> >> The most common way to design this gear is with an isolated supply. That >> eliminates a bunch of odd line fault issues. The easy way to check this is >> with an ohm meter. If it's isolated (and I'll bet it is) then polarity to >> ground isn't an issue. Polarity between the supply input pins is always >> going to matter…. >> >> The back of the units I have are labeled "+27V or -53V…". I run mine on a 28 >> volt supply. >> >> Bob >> >> On Feb 9, 2013, at 11:18 AM, EB4APL <eb4...@cembreros.jazztel.es> wrote: >> >>> Hello, >>> >>> According to a Nortel specification document (Dual Voltage Global >>> Positioning System Timing Module (GPSTM) OEM General Specification >>> Dataset Name: GSBW50AA), this GPSDO is dual voltage and can be powered >>> either from -48 V or + 24 V systems. Mine is working from a 48 V power >>> supply but I´m afraid to test it at 24 V because the polarity should be >>> reversed and if my assumption is not true I can damage the unit. >>> Do you know if these units are dual voltage or my documentation refers to >>> other model?. Has anybody operated it at 24 V?. >>> Another question, is there any internal 1PPS signal available? >>> Of course, my unit is of ebay - China origin. >>> >>> Regards, >>> Ignacio EB4APL >>> _______________________________________________ > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
