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
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