[time-nuts] ADF4001/4002 startup questions

Bob Camp kb8tq at n1k.org
Wed Nov 19 17:55:43 EST 2014


The 4001 is pretty forgiving of order of load issues. I’ve always just followed the order in the AD app notes and it’s worked fine. 

I’d recommend getting any of the USB logic level scopes and tacking it onto what you have. The ones I have seen are plenty fast enough for this kind of thing. The software that comes with them lets them run as a logic analyzer with deep enough memory to see the whole load process. If you are half as prone to error as I am, it will pay for it’s self pretty fast. 


> On Nov 19, 2014, at 12:35 PM, Neil Schroeder <gigneil at gmail.com> wrote:
> Morning nuts-
> I'm aware several of you use the ADF4002 for a simple small PLL in your
> radios.  Could any of you share some example bits or maybe even the code
> you use during startup?   I know what my latch values should be, but I
> don't seem to be getting them wrapped in the right control bits.
> I am a hardware guy, this software stuff is coming to me slowly.  Thanks
> for any help, feel free to reply directly.
> NS
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