[hpsdr] TeamSpeak audio 2014/Nov/22

[Edson W. R. Pereira]

I've enjoyed the discussions this week. Specially Warren's explanation
about frequency translation when using the overlap-and-save algorithm. I've
found this article that depicts Warren's explanations very nicely.

http://www.3db-labs.com/01598092_MultibandFilterbank.pdf

73, Edson PY2SDR


---
- We humans have the capability to do amazing things if we work together.
- Nós seres humanos temos a capacidade de fazer coisas incríveis se
trabalharmos juntos.

On Sat, Nov 22, 2014 at 1:46 AM, AA8K73 GMail <aa8k73 at gmail.com> wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
>
> The 22/Nov TeamSpeak mp3 (67 minutes) 64 kbps is available at:
>
> < http://www.hamsdr.com/dnld.aspx?id=3528 >
>
> or
>
> < http://www.hamsdr.com/dnld.aspx >
>
>
>
> Session text follows
>
>
> <20:33:28> *** You are now talking in channel: "OpenHPSDR"
>
> <21:14:52> "Bill - KD5TFD": often the case (pics vs words)
>
> <21:21:00> "Bill - KD5TFD": convultion ... oh my head hurts so much now!
>
> <21:37:21> "John - AJ6BC": OK - got DFM report from Sunstone - pretty nice
> - especially for the $$$ - it was free!
>
> <21:37:34> "Bill - KD5TFD": ?DFM?
>
> <21:38:06> "John - AJ6BC": Design For Manufacture - it is a process where
> manufacturing and fabrication rules are run against the gerbers.
>
> <21:38:30> "John - AJ6BC": Usually costs in kilobuck range to get this
> done historically.
>
> <21:38:38> "Bill - KD5TFD": ahh .. so making sure what you've got on paper
> can actually been built
>
> <21:38:47> "Bill - KD5TFD": wow .. pricey
>
> <21:39:16> "John - AJ6BC": Yep - plus there's always little nasties in the
> layout - good for catching those.
>
> <21:39:26> "John - AJ6BC": Oh yeah - DFM is a big deal.
>
> <21:39:30> "Bill - KD5TFD": yup
>
> <21:39:59> "John - AJ6BC":
> https://quoting.sunstone.com/dfm.aspx
>
> <21:47:25> "John - AJ6BC": Interesting what a GOOG search yields for this
> right now:  online pcb dfm services
>
> <21:53:14> "John - AJ6BC": Bill the other term used in the industry is
> Valor check - that was the company/person that started this.  Valor
> databases contain all 'approved' footprints.
>
> <21:53:40> "Bill - KD5TFD": ahh ..never heard either term
>
> <21:54:32> "John - AJ6BC":
> http://www.freedomcad.com/services/dfm-valor-services/
>
> <21:55:32> "John - AJ6BC": Common knowledge in PCB fab industry - but if
> you aren't directly involved in that - yep; like jargon in any industry;
> you wouldn't realize what it means.
>
> <21:55:44> "Bill - KD5TFD": ya
>
> <21:59:50> "Bill - KD5TFD": these are the guys building an ak5394 based
> sound card plus some control for soft rock type gizmos?
>
> <22:03:28> "Dave - KV0S":
> http://groups.google.com/group/sdr-widget
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