[hpsdr] Atlas voltages

[Graham / KE9H]

The only power used by the current HPSDR card set is +12 and +5. (And 
very rarely -12V)
You can normally leave -12 V turned off in the LPU.

Today, nothing uses +3.3 and -5 V, so no issue. There are jumper 
options, and sometthing
could change in the future, but not now.

--- Graham / KE9H

==

Isaac Weksler wrote:
>
> I am new to HPSDR and just started to put together the radio. I have a 
> question about Atlas+LPU.
>
> I have assembled and installed LPU and Atlas. The +12v and +5v are OK.
>
> However, I measure +1.26v on A30, designated to +3.3v and is supposed 
> to be 0, since LPU does not produce this.
>
> The A28 (designated -5v) shows -1.31v and is also supposed to show 0 
> as LPU does not produce it.
>
> Is this normal? Won't it cause damage to boards going into Atlas?
>
>  
>
> 73
>
> Isaac 4Z1AO
>
> ------------------------------------------------------------------------


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