[time-nuts] Datum TS-2100 Rubidium
David C. Partridge
david.partridge at perdrix.co.uk
Wed Jul 21 15:23:28 UTC 2010
In which case if the lpro needs +24, then use a buck-boost 12-24V DC-DC converter.
Regards,
David Partridge
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] 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: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] 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 -- time-nuts at 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 at febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
More information about the Time-nuts_lists.febo.com
mailing list