In which case if the lpro needs +24, then use a buck-boost 12-24V DC-DC converter.
Regards, David Partridge -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Rob Kimberley Sent: 21 July 2010 16:08 To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Datum TS-2100 Rubidium Ground is chassis ground as far as I remember, and the LPRO was bolted straight on the chassis. RobK -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Magnus Danielson Sent: 21 July 2010 10:52 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Datum TS-2100 Rubidium On 07/21/2010 10:11 AM, David C. Partridge wrote: >> but the LPRO isn't designed (well, according to the spec) for GND != >> -VE > > So long as you don't introduce it to real ground (i.e. isolate it), it > won't know that the -12V is floating below world ground :-) Doable, but surely chassi ground of the LPRO is also tied to electrical ground? Last time I looked around, it sure looked like things where tied to chassi too. If so you need to electrically isolate the whole LPRO. The 10 MHz is easy enough with a transformer. The control signals would not be too hard. Another solution is to let the -12 V lead also be chassi... which works but is prone to errors... Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
