[time-nuts] Re: HP Z3801A info needed - 1PPS interface

[Lux, Jim]

On 10/5/21 12:46 PM, paul swed wrote:
> Ed I seem to be a bit slow. Had not heard of your project.
> On the real 3801 the 25 pin connector is actually RS 422.
> Regards
> Paul
> WB8TSL
>

conveniently enough, there are onboard jumpers that can turn it into 
RS232, although these days, you can get a nice RS422/RS485 to USB widget 
for $10.