Daniel O'Connor wrote:
>
>
>> On 17 Jun 2022, at 00:07, David Taylor
>> wrote:
>>
>> On 16/06/2022 10:00, Thiebaud HUMBERT wrote:
>>> To do the inversion, I just changed the "Pulse Mode" parameter to "Falling
>>> edge" from "Rising edge".
>>> The offset induced by the "pulse length" has
Quoting Daniel O'Connor :
If you are using it for NTP then GPS+PPS over USB is quite adequate
(from personal experience).
Ian Lepore (RIP) who worked for Micro Semi and worked on FreeBSD did
a bunch of tests on a PPS over USB setup and found it more than
acceptable for keeping a PC in
chris wrote:
> On 06/16/22 16:20, Jim Pennino wrote:
>> Thibaut HUMBERT wrote:
>>> Le jeudi 16 juin 2022 à 16:37:33 UTC+2, David Taylor a écrit :
On 16/06/2022 10:00, Thiebaud HUMBERT wrote:
> To do the inversion, I just changed the "Pulse Mode" parameter to
> "Falling edge" from
On 16/06/2022 15:54, Thibaut HUMBERT wrote:
I have a serial port, but I don't know how to convert the PPS output (0 / 3.3V)
to RS232 (-5V / +5V).
RS232 is +/-12V, although, input values of +/-3V are unequivocal. In
practice line receivers have both positive and negative going thresholds
>
Thibaut HUMBERT wrote:
> Le jeudi 16 juin 2022 à 16:37:33 UTC+2, David Taylor a écrit :
>> On 16/06/2022 10:00, Thiebaud HUMBERT wrote:
>> > To do the inversion, I just changed the "Pulse Mode" parameter to "Falling
>> > edge" from "Rising edge".
>> > The offset induced by the "pulse length"
On 16/06/2022 10:00, Thiebaud HUMBERT wrote:
To do the inversion, I just changed the "Pulse Mode" parameter to "Falling edge" from
"Rising edge".
The offset induced by the "pulse length" has disappeared.
But there is still an offset of around 10.3ms, which I think is induced by USB
as
On 16/06/2022 09:01, Thibaut HUMBERT wrote:
When I modify the PPS pulse length in u-center, the offset varies:
I would suggest you are detecting the wrong edge of the pulse. You may
need to add an inverter.
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