[time-nuts] LeoNTP PPS output to PC DB9 input
Mike Cook
michael.cook at sfr.fr
Wed May 29 07:17:58 UTC 2019
I don’t have one of these but I wouldn’t connect anything to anything without knowing the specs.
I went to their site but could not find any specs on the outputs on the BNC connector. I should mail them at orders at uputronics.com for the details.
It could be a simple BNC to DB9 soldering job. But there is something else to consider.
What happens when there is a power cycle?
Does the LeoNTP BNC output come up in the last configured state? Does it come up in OFF mode or with 10MHz? I doubt that your BSD box would appreciate 10Mhz.
> Le 29 mai 2019 à 07:18, tom burkart <tom at aussec.com> a écrit :
>
> Quoting Anthony Dunne <agdunne at hotmail.com>:
>
>> Firstly would this work?
> Yes.
>
>> Secondly, my dilemma is the pin-out.
>> I believe on the DB9 pin 1 is DCD (the actual pulse) and pin 5 is the ground. Is this correct?
> Yes.
>
>> Could I use a cable such as this:-
> No.
>
>> Alternatively, is there a simpler way to achieve the goal?
> No, you really need a level shifting stage that converts the PPS to RS232 levels.
>
> Tom
>
>
>
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