Friday, May 21, 2010

Re: [Discuss-gnuradio] 16 digital I/O lines to control external devices like antenna switches

On 05/21/2010 10:08 AM, Harley Myler wrote:
>
> Well of course, but then it is "industry practice" to identify the separation; i.e., U1-A, U1-B, etc.
>
>
>
I've seen it done a number of different ways, some more confusing than
others, to be sure.

> Even better, but still hardly 16.
>
>
True enough, and I agree that the data sheet is somewhat misleading. It
should either say
"up to 16 I/O lines available for external devices", or each device
description should include
the number of "uncommitted" I/O lines available (actually, the device
descriptions could use
a general re-work to include more information about them in terms of
performance, functionality,
etc, etc). I think that what you're experiencing is a symptom of a
company whose customer
base has grown faster than anticipated, and some of the "good
housekeeping" things, like
really-detailed documentation, have suffered somewhat. My
understanding is that this will
get better over the next several months, as NI provides resources to
tackle some of the
documentation.

> Now what is your explanation on the tokens?
>
>
None at all. I guess that whoever drew them opted not to (or forgot) to
fill in the "housekeeping"
fields on those schematic sheets.
> Note to list: Marcus is the tech support assistant for Ettus Research.
>
>
Yup, that's true. Many on this list already know that--either because
they know me personally, or
I've had interactions with them as Ettus customers. I haven't made
any attempt to keep that a
secret, but since I'm a self-employed technology freelancer, I make it
a policy not to
explicitly advertise my relationships with my clients in public
fora--either because there's an
NDA in place, or because it's just polite business practice.

--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

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