[time-nuts] Trimble/Nortel NTGS50AA GPSDO not start

EB4APL eb4apl at cembreros.jazztel.es
Tue Jun 12 00:10:24 UTC 2012


I'm sorry but disregard my last.  I don't know what was happening before 
but it is running.
Now to connect LH and start the fun

Regards,
Ignacio, EB4APL



On 12/06/2012 2:01, EB4APL wrote:
> Hi,
>
> I received one of those boards from the usual Chinese supplier.  I 
> tried to power it up according to the specs but the DC/DC converter 
> doesn't start.
> Tracing the power path, I find that after protective diodes and fuses, 
> the -48 V line is interrupted by a power MOSFET and the question is:  
> is it necessary to make any other connections, such as strapping the 
> mounting holes to a chassis, in order to make it start? Or maybe is my 
> unit faulty?
>
> TIA for your help,
> Ignacio EB4APL




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