[time-nuts] Help with BG7TBL 2015-07-08 GPSDO

[djl]

Are they both "real" RS-232, both 5v ttl rs232, or hopelessly mixed?

On 2020-02-01 15:18, Gary Woods wrote:
> On Sat, 1 Feb 2020 12:24:24 -0600, you wrote:
> 
>> Hmmm. I do not have any of that equipment, but I do know the RS232
>> interface pretty well. It may be that you need to cross over the
>> connections with RX and TX. Do you have a null modem type device 
>> handy?
> The GPSDO says it only needs send and receive data; no handshake. I've
> got a break-out adapter in the line passing only those and ground.
> Reversing t/r doesn't help.
> Gonna scope the interface chip's ins/outs, but right now the cellar
> hamshack/shop/man cave is just too (*^&*%* cold!
> 
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-- 
Dr. Don Latham  AJ7LL
PO Box 404, Frenchtown, MT, 59834
VOX: 406-626-4304