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Re: [Discuss-gnuradio] LFRX as IF stage questions

From: Nemanja Savic
Subject: Re: [Discuss-gnuradio] LFRX as IF stage questions
Date: Thu, 15 Aug 2013 14:04:40 +0200

I can't use basix_rx, cause i can't get it. the problem is i want to use ti's cc1000 as rf frontend. it has if output at 10.7 MHz.
The problem is i can't make pll of cc1000 to lock, and I assume that the problem is mayne in not accurate quartz reference
due to bad loading capacitors.

Yes I agree it would be great to be able to enable some clock for lf boards.


On Wed, Aug 14, 2013 at 1:56 AM, Marcus D. Leech <address@hidden> wrote:
On 08/13/2013 07:47 PM, Matt Ettus wrote:

I just realized the LFRX does not have the clock pin.  The BasicRX does, and should also work the same way for your application.  So if you need the clock output, the BasicRX is a better choice.

And, as a follow-up, you might need to muck with the appropriate UHD driver to get it to enable those clock pins,and drive them at a suitable rate.

You will likely have to "crib" from the drivers for cards that require a refclock--like, well, all of them *except* for BASIC_* and LF_*.

In fact, it might be reasonable to suggest that there be an option in the standard drivers to enable those pins at a default rate of 10Mhz or something
  for the BASIC_* cards.  Or some easily-usable API frob to do so.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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