[hpsdr] Hermes - initial powerup

[Phil Harman]

Please check this is explained adequately in the User Guide. Hermes will
be shipped configured for use with a 13.8v DC supply.

Thanks

73 Phil...VK6APH


> ***** High Performance Software Defined Radio Discussion List *****
>
> The power switch is not needed. It is bypassed with zero-ohm resistors.
>
> J10 pinout:
> +12V to J10-1
> gnd to J10-2
> gnd to J10-3
> +5V to J10-4
>
> Jumper J21 to enable the on-board 12V to 5V SMPS. This just connects
> the power to it, it doesn't connect the +5V output to the rest of the
> board. J26 does that.
>
> J26 selects the +5V source: pins 1-2 for off-board +5V power or pins
> 2-3 for on-board SMPS supplied power.
>
> Jumper J18 to supply power to the on-board 12V LDO. This just
> connects the power to it, it doesn't connect the +12V output to the
> PA and Alex header. J17 does that.
>
> J17 selects the +12V source: pins 1-2 for off-board +12V power or
> pins 2-3 for on-board LDO supplied power.
>
> If your power input is +13.8V, you MUST use jumper J18 and J17 pins
> 2-3, as the PA is not designed for 13.8VDC power, just 12.0V power.
>
> If you limit your input voltage to 12.0V, you can un-jumper J18 and
> jumper J17 pins 1-2 to run the 12V section of Hermes (PA and Alex
> header) off of that. The SMPS will work fine from either 12.0V or 13.8V.
>
>
> That pretty much summarizes the power connector/headers in the lower
> left corner.
>
> 73,
> Scotty WA2DFI
>
>
>
> At 14:01 2012-03-29 -0700, you wrote:
>>***** High Performance Software Defined Radio Discussion List *****
>>
>>On Mar 29, 2012, at 1:51 PM, Lyle Johnson wrote:
>>
>> > ***** High Performance Software Defined Radio Discussion List *****
>> >
>> > On my board, J10 is missing (power connector).  Do we have a part
>> number available so I can order a connector?  It is hard to tell
>> from the phtotgraph, but the manual specifies polarity referring to
>> pin 1 and pin 2.  Is the connector so labeled, or is this a 2.x mm
>> "coaxial" connector in which case is the center pin positive?
>>
>> From what I can tell, J10 seems to be moved from the picture that
>> Phil has in the manual.  Note that the PCB says "J27" in the spot
>> where Phil has it marked in the picture.  J10 seems to now by right
>> behind where SW1 is.  It's a 4-pin connector, and this seems to
>> correspond to what Phil has written in the manual, with pins 1&2
>> being 13.8V and pins 3&4 being an external 5V supply, if selected.
>>
>> > Also, the power switch SW1 is missing.  Same question - where can
>> I obtain one?  Or is there a jumper setting that makes the power
>> switch get bypassed?  The user manual states that the power switch
>> must be activated, so I am (again) assuming the switch is a requirement.
>> >
>> > Thanks!
>> >
>> > Lyle KK7P
>>
>>--
>>Jeremy McDermond (NH6Z)
>>Xenotropic Systems
>>mcdermj at xenotropic.com
>>
>>
>>
>>_______________________________________________
>>HPSDR Discussion List
>>To post msg: hpsdr at openhpsdr.org
>>Subscription help:
>> http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
>>HPSDR web page: http://openhpsdr.org
>>Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
>
>
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help:
> http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
>
>



 1333070817.0