[hpsdr] Some thoughts on plug-in board layout

[Steven Bible]

Phil and group,

Attached is a mechanical drawing I did to hopefully understand the dimensions of an individual card.  I placed 100mm, 120mm, 160mm, and 185mm dimensions.

Will someone tell me what the base measurement system will be (metric or inches)?  I think it should be metric, however, the DIN 41612 has base dimensions appear in inches.

Phil, in your ATLUS PLUG-INS drawing, you show 12.6 mm from the bottom of the PCB to the end of the DIN 41612 plug.  I think this is actually 7.37 mm.  The 12.6 mm is the top of the DIN plug plastic to bottom, not how it is mounted to the PCB.

The DIN plug that I used what the one Lyle called out for JANUS (AMP P/N 650473-5).

I don't really understand the "external connector area".  Is this PCB material?  Or is this just an placeholder?  What is the interface plane?

So looking at the card from the component side, the DIN connector is on the bottom, connectors on the left.  So nothing should be in top or to the right?  What notes should be added to this drawing to aid the prospective card designer?  Hopefully this drawing can be used as a basis for anyone starting a card.  Everyone, please comment on the dimensions you think should be put on it.

The other drawing I would like to do has common components that should be on all plug in boards (serial epprom, etc.).  I need help if someone could list what these items are.  I can look at JANUS and OZY for examples.

- Steve N7HPR




-----Original Message-----
>From: Philip Covington <p.covington at gmail.com>
>Sent: May 25, 2006 2:24 PM
>To: Lyle Johnson <kk7p at wavecable.com>
>Cc: Open High Performance SDR Project <hpsdr at hpsdr.org>
>Subject: Re: [hpsdr] Some thoughts on plug-in board layout
>
>***** High Performance Software Defined Radio Discussion List *****
>
>On 5/25/06, Lyle Johnson <kk7p at wavecable.com> wrote:
>> Phil,
>>
>> >> I see pluses and minuses to each form factor.  I don't have any
>> >> problem changing it or redoing the OZY layout (since it isn't too far
>> >> along).  Lyle is further along on JANUS and he makes some good points
>> >> about signal flow in a previous post.  It matters less with the OZY
>> >> board since it is pretty much all digital signals (other than the USB)
>> >> and there are not the concerns of separating the analog and digital
>> >> sections like there is in the JANUS.
>> >>
>> >> Take a look at the drawing about and please comment.  We need to get
>> >> this resolved soon so we proceed with the JANUS and OZY.
>>
>> This makes the smallest card 100mm high and 120mm wide if I understand
>> the drawing correctly.
>>
>> I'll see if I can fit Janus into this footprint.
>>
>> 73,
>>
>> Lyle KK7P
>
>Hi Lyle,
>
>Yes, the smallest would be 100x120mm if we adopt the form factors
>spelled out in the PDF drawing I did.  Basically anything between
>100x120mm and 100x220mm should be no problem to fit in an ATX case (if
>so inclined).  I just showed different board lengths based on Alex's
>proposal (100x185mm) and added some of my own:
>
>100x120mm
>100x160mm
>100x185mm
>100x220mm
>
>The smallest size (100x120mm) was based on having enough clearance
>around the DIN41612 and still allowing external connectors to go all
>the way to the bottom of the board.
>
>The largest size (100x220mm) was based on staying within the ATX
>motherboard footprint.  I think the PCI card spec says that PCI cards
>can be 312mm long, but I haven't seen any that long in a long while!
>220mm (8.6") keeps us within the 9.6" length ATX motherboard
>footprint.
>
>The cards and ATLAS ATX power connector are oriented so the power
>connector is located as the ATX spec suggests.
>
>73 de Phil N8VB
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\r\n- Steve\r\n  (n7hpr at tapr.org)\r\n
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