[time-nuts] Setting Time on WSPR Radio Transmitter

Hal Murray hmurray at megapathdsl.net
Fri Jun 22 14:27:43 EDT 2018


brooke at pacific.net said:
> I'm experimenting with a WSPR beacon transmitter and part of how it works
> depends on pushing the start button at exactly  2 seconds past the minute.

What do you mean by "exactly"?


> SotaBeams, who make the WSPRlite transmitter recommends using http://time.is/
> which seems to be accurate on my cell  phone but not on my desktop running
> the stock NTP. Can someone comment on time.is?

How does time on your cell phone compare with your desktop?

ntpq -p on your desktop will give you a lot of information on how good your 
desktop time is.


time.is seems to be using javascript over http/TCP.  That's not a good start, 
but can be good enough, depending on your needs and the implementation 
details.  I'm generally not impressed with things that don't provide details.  
(Maybe I just didn't look in the right place.)

In this type of discussion, a lot depends on your network connections.  How 
good is the connection to your desktop?  How good is the connection to your 
cell phone?


> The problem is the transmitter (and the start button) are out in the forest
> where the antenna is located. 

What sort of connection do you have to the transmitter?  I'm guessing there is 
something like a Raspberry Pi out there.  Why not run NTP on that system?


-- 
These are my opinions.  I hate spam.






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