[time-nuts] Important RTFG interface information

[John Ackermann N8UR]

I've seen situations where it seems that the units aren't being
disciplined as they should be.  I hope that getting this cable right
will solve that problem.

John
----

TheInfamousFlavio at hotmail.com said the following on 02/27/2007 06:57 PM:
> Pins 1 and 5 on each unit control the failover functionallity.  If you 
> disconnect them entirely on both the XO and RB units, both units will be in 
> ON mode.  But it will be interesting to see what happens when it goes only 
> one way.
> 
> 
> ----- Original Message ----- 
> From: "John Ackermann N8UR" <jra at febo.com>
> To: "Discussion of precise time and frequency measurement" 
> <time-nuts at febo.com>
> Sent: Tuesday, February 27, 2007 17:27
> Subject: [time-nuts] Important RTFG interface information
> 
> 
>> I just acquired the mysterious interface cable that goes between the
>> RTFG-m-XO and RTFG-m-RB units.  I have suspected that it wasn't a simple
>> crossover cable, because the results I've seen with my homemade
>> crossover haven't made a lot of sense.
>>
>> Here's the scoop:  the interface cable is a simple DB-9 to DB-9 ribbon
>> cable with the ribbon flipped -- the striped side goes to pin 1 on the
>> RB end, and to pin 5 on the XO end.  We pretty much knew that.
>>
>> However, the conductor on the other edge of the ribbon (between pin 5 on
>> the RB end, and pin 1 on the XO end) is BROKEN in the middle.
>>
>> So, there is NO CONNECTION between XO pin 1 and RB pin 5.  (It goes
>> without saying, but I'll say it anyway, that this means the cable ends
>> are not interchangeable -- there is an XO end and an RB end.)
>>
>> Hope this is helpful.  I got a few more interesting bits and pieces
>> along with this cable, but I think this is the important news for those
>> of us trying to interface these units at home.
>>
>> John
>>
>> _______________________________________________
>> time-nuts mailing list
>> time-nuts at febo.com
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>
> 
> 
> _______________________________________________
> time-nuts mailing list
> time-nuts at febo.com
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> 
>