[time-nuts] wtd: WWVB info

Bob Camp kb8tq at n1k.org
Sun Aug 9 16:16:43 EDT 2015


Ok, that’s a 20 year old IC. When it talks about doing WWVB, it’s talking about
the AM modulation format. It’s not talking about the new phase modulation approach. 
These are the chips that probably will disappear completely once the chips for the newer format 
show up. 


> On Aug 9, 2015, at 2:11 PM, Donald <donvukovic at gmail.com> wrote:
> On 8/8/2015 11:16 AM, Bob Camp wrote:
>> HI
>> Discrete as in resistors and transistors or discrete as in “stuff plus an MCU”?
> To be clear(er):
> This data sheet is one of a few receivers from a few vendors:
> http://www.datasheetcatalog.com/datasheets_pdf/U/4/2/2/U4221B.shtml
> Looking at the data sheet link shows the internals of the receiver chip.
> This chip outputs the serial stream of the WWVB pwm data.
> From there any MCU can decode that stream via bit-bang.
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