[hpsdr] External Clock

Wed Sep 24 01:34:22 PDT 2008

Bruce,

feed clock 3,3V into C16 on Atlas. B16 is GND.
switch 10 MHz clock selection in PowerSDR to "Atlas".

73, Gerd
DJ8AY

-----Original Message-----
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Subject: Hpsdr Digest, Vol 31, Issue 15

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Today's Topics:

   1. Re: power supply for hpsdr (Standa Holecek)
   2. External reference clock (Bruce Walker)

----------------------------------------------------------------------

Message: 1
Date: Tue, 23 Sep 2008 12:52:41 +0200
From: "Standa Holecek" <ok1vsh at gmail.com>
Subject: Re: [hpsdr] power supply for hpsdr
To: hpsdr at hpsdr.org
Message-ID:
	<33b9c9c70809230352i3c6be733pa316c12cacf60bcc at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

2008/6/29 Dominic Hawken <dominic at del.co.uk>

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi All,
>
> Many, many thanks for the power suppy info - am wiring it all up now 
> :-)
>
> Thanks again.
>
> Dominic.
>
> ----- Original Message ----- From: "Eric Ellison" 
> <ecellison at gmail.com>
> To: "'Dominic Hawken'" <dominic at del.co.uk>; <hpsdr at hpsdr.org>
> Sent: Saturday, June 28, 2008 4:34 PM
> Subject: RE: [hpsdr] power supply for hpsdr
>
>
>  Dominic / All
>>
>> Power supplies for Atlas have been discussed many times and board 
>> current measurements (except for Mercury at the moment) have been 
>> posted. No problem for bringing it up again. The design of Atlas to 
>> use a standard ATX connector and place boards on PC slot spacing for 
>> 'cabinet' purposes were discussed extensively prior to Phil Covington 
>> finalizing Atlas.. Check the HPSDR archives all the way back to Xylo 
>> Group for earlier work on Power and
>> Atlas design.
>>
>> There are numerous articles posted on the Web for using and taming 
>> ATX power supplies for bench supply use. Note on most supplies (Not 
>> PicoPSU) you will
>> need a 10 ohm 10 watt resistor in the 5 volt line to provide load to keep
>> power on the outputs.
>>
>> Just one example:
>>
>> http://www.mbeckler.org/powersupply.html
>
>
good link is http://www.mbeckler.org/powersupply/

<http://www.mbeckler.org/powersupply.html>
>>
>> Also Scotty - WA2DFI TAPR has extensively used the PicoPSU to power 
>> and test the various boards. The Pico PSU was somewhat crudely tested 
>> in the early going and found to be pretty quiet on the buss. If I 
>> remember correctly there was some short range 'radiated' rf noise. So 
>> far it handles a reasonable number of boards. Mercury will probably 
>> bring a new definition to
>> the word Sensitivity, and Phil Harman and other alpha testers will be
>> testing the Mercury Alpha with PicoPSU to see if there are any issues.
>> Since
>> the 5 Mercury Alpha's are on the way to the testers, we should know in a
>> week.
>>
>> http://www.mini-box.com/s.nl/it.A/id.417/.f
>>
>>
>> Many HPSDR nuts are using bench supplies.
>>
>> There is no Standard Supply or recommended supply at this point.
>>
>> Thanks
>> Eric - AA4SW
>>
>>
>>
>> -----Original Message-----
>> From: hpsdr-bounces at lists.hpsdr.org 
>> [mailto:hpsdr-bounces at lists.hpsdr.org
>> ]
>> On Behalf Of Dominic Hawken
>> Sent: Friday, June 27, 2008 8:25 PM
>> To: hpsdr at hpsdr.org
>> Subject: [hpsdr] power supply for hpsdr
>>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Apologies if this has been covered before - have googled etc.
>>
>> Is there a current preferred psu to use for Atlas etc? Am about to 
>> plug in my home-assembled Atlas and all available boards but slightly 
>> scared I might blow the whole thing with a bad solder joint. All 
>> looks good but recent mention of 'over-voltage' protection etc makes 
>> me a little scared of using a standard PC psu / flicking the on 
>> switch.
>>
>> What's the current psu of choice for you guys that have up and 
>> running systems?
>>
>> Dominic - G6NQO
>>
>> --
>> Director
>> Deluxe Corporation Ltd
>> http://www.del.co.uk/ _______________________________________________
>> HPSDR Discussion List
>> To post msg: hpsdr at hpsdr.org
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>>
>>
>>
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-- 

73! de Standa OK1VSH
RadioClub Vodnany OK1KFB
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Message: 2
Date: Tue, 23 Sep 2008 13:33:45 -0400
From: "Bruce Walker" <bruce at quidnet.com>
Subject: [hpsdr] External reference clock
To: hpsdr at hpsdr.org
Message-ID:
	<f46de1180809231033x36d47c70g357cf359a586cc50 at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

I'm a newbie to the HPSDR hardware, having recently obtained a board set
(Ozy/Janus/Penny).  For the time being, I plan to drive my SDR-1000 with
O/J, and I hope to add Mercury in the future.

One of the things I definitely plan to do is hook up my Thunderbolt GPSDO as
an external 10MHz clock reference for precision sampling (I already drive
the SDR-1000 DDS with it).  I'm certinaly willing to dig through all the bus
docs/specs, but I figured someone here has likely done the same thing.  If
so, a HowTo would be appreciated.

Thanks,
--bruce W1BW
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