[time-nuts] new WWVB BPSK dev board

[jimlux]

On 12/5/18 6:29 AM, Richard (Rick) Karlquist wrote:
> On 12/4/2018 6:29 PM, Gilles Clement wrote:
>> Hi,
>> In France the carrier frequency is 162khz (Allouis)
>> Phase modulated over one minute.
>> Gilles.
>>
> 
> Interesting:  isn't 162 kHz within the European
> Long Wave Broadcast Band?  Wouldn't there be a
> problem with QRM from these megawatt stations?
> Excuse the naive questions; we don't have longwave
> in the states, so no experience here.
> 

Indeed. I was just tuning around with some of the Kiwi SDRs suggested by 
phk.  Front end selectivity or plenty of dynamic range in the ADC would 
be important.

I suppose, though, that the integration time is quite long, so from a 
"recovering the bits" standpoint, the detection bandwidth can be quite 
narrow, and your desired signal might be buried in the grass of the raw 
samples.


I also tried to see some 60kHz in the US.. no joy yet.. but I'll load up 
the client and see if I can capture some bits.