[time-nuts] Is it sensible to update every few seconds from NTP server?

[Jim Lux]

On 11/7/12 5:42 PM, shalimr9 at gmail.com wrote:
> That sounds odd, as most radios take tens of millisecond, if not hundreds to switch from transmit to receive and back in any mode other than break-in CW.
>
> Further JT65 is used with propagation modes that typically do not have a stable or predictable propagation time like moonbounce or meteor scatter, so I don't understand why mS timing would be necessary?
>
> I must be missing something.
>
>

maybe some form of Coherent or very low speed CW or equivalent, where 
you use an external reference to get symbol timing.  Say you were 
sending at 1 bit per second, using a 1 PPS as your symbol clock.  You 
send a sync pattern at the beginning, then free run for the message.

Don't forget that the implementation may be very unsophisticated or 
adopted/modified from some hardware design where the timing was counted 
down from a good clock, and now it's just a slavish copy in software.