[time-nuts] La Crosse Clocks -

[Tom Van Baak]

 > Transmitting on the same frequency you are receiving on seems like 
asking for  troubles.

Same frequency, but you wouldn't do both at the same time. See, you 
can't transmit AM WWVB until you first know what time it is. To get the 
time you enable the ES100 and listen to BPSK WWVB. So the ES100 receiver 
and Arduino transmitter are not active as the same time. One example 
might be to enable the ES100 for 3 minutes each hour and run the Arduino 
for the balance.

 > How far apart would the antennas have to be?

Use the standard dual right angle ES100 antenna setup to receive BPSK 
WWVB. For transmit, you likely don't need, and legally don't want, an 
antenna. The Arduino is likely within a few feet of the 24h RC clock 
that you're trying to set. If it doesn't work first time, dangle a 
jumper off the GPIO pin.

/tvb


On 12/26/2020 1:59 PM, Hal Murray wrote:
> tvb at LeapSecond.com said:
>> Use a ES100 board [2] to receive the real BPSK WWVB and then generate a  fake
>> AM WWVB signal for the 24h clock to receive. That way you get the  enhanced
>> reception of the new format and the wide clock selection of the
> Transmitting on the same frequency you are receiving on seems like asking for
> troubles.
>
> How far apart would the antennas have to be?  How would you calculate that
> distance?  Or what is the right question?
>
>