[ntp:questions] Re: 1pps signal,20us width

W. D. WD at US-Webmasters.com
Wed Nov 3 20:23:32 UTC 2004


At 10:15 11/3/2004, Fei Wu wrote:
>Thanks for your reply.
>
>I want to use this 1pps signal to directly connect to
>the serial ports of several hosts at the same time. In
>this way, I can have several strtum 1 time servers
>with only one external clock. That is my plan. The
>hosts run FreeBSD4.9 or FreeBSD5.1 and NTP 4.1.1 or
>4.2.0. 
>
>thanks
>
>Fei

http://www.ese-web.com/249.htm
http://www.Google.com/search?q=(rs-232+OR+rs232)+(splitter+OR+amplifier)

>
>--- David Schwartz <davids at webmaster.com> wrote:
>
>> 
>> "Fei Wu" <fxw115 at yahoo.com> wrote in message 
>>
>news:mailman.5.1099468427.537.questions at lists.ntp.isc.org...
>> 
>> > I remember I have seen the similar question before
>> in
>> > this list, but I can only get around 200 posted
>> emails
>> > by using email newsgroup. Appreciate if anyone can
>> > tell me how to check all the emails.
>> >
>> > I have a time server with 1pps output. The width
>> of
>> > the pulse is around 20us. I know generally people
>> will
>> > use a gadget box to enlarge the pulse to around
>> 100us
>> > to fit 1bit as 9600bps com port.
>> >
>> > Is it possible for me to set the bit rate to 56K?
>> So
>> > 20us pulse can be treat as one bit width;
>> therefore,
>> > ntp can lock the edge of pulse?
>> 
>>     What are you planning to connect the PPS pulse
>> to? What operating 
>> system?
>> 
>>     DS
>> 
>> 
>> _______________________________________________
>> questions mailing list
>> questions at lists.ntp.isc.org
>> https://lists.ntp.isc.org/mailman/listinfo/questions
>> 
>
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam?  Yahoo! Mail has the best spam protection around 
>http://mail.yahoo.com 
>_______________________________________________
>questions mailing list
>questions at lists.ntp.isc.org
>https://lists.ntp.isc.org/mailman/listinfo/questions

Start Here to Find It Fast!™ -> http://www.US-Webmasters.com/best-start-page/
$8.77 Domain Names -> http://domains.us-webmasters.com/




More information about the questions mailing list