[time-nuts] Z3805 utility, Was: AW: (no subject)

Bob Camp lists at rtty.us
Mon May 24 01:32:35 UTC 2010


Hi

Holdover = it can't find any GPS sat's and is running on the OCXO.

Bob


On May 23, 2010, at 9:29 PM, Robert Benward wrote:

> My previous email is my mea culpa....
> 
> The box is now in holdover mode.  I don't what that means, it's been running for a few hours now.
> 
> Bob
> 
> ----- Original Message ----- From: "Jeff Hook" <jeffhook at comcast.net>
> To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
> Sent: Sunday, May 23, 2010 9:15 PM
> Subject: Re: [time-nuts] Z3805 utility, Was: AW: (no subject)
> 
> 
>> Bob,
>> Does your "plain" serial cable have 25pin on one end and 9pin on the other?
>> If so, it shoud be 2-3 and 3-2 (because of DB9 toDB25 conversion)
>> If its 2-2 and 3-3 its a null modem cable (this is what you want)
>> This is not true if its 9 pin to 9 pin or 25 pin to 25 pin cable
>> "standard" serial cables are 2-2 and 3-3
>> Null modems are  2-3 and 3-2
>> Jeff
>>> Jeff,
>>> I just measured one of my " plain serial" cables, it's 2-2 and 3-3.  Now I'm really confused!!!
>>> 
>>> "TX" and "RX" have the same pin numbers, so a DCE to DTE needs 2&3 swapped.  Does that mean a DCE to DTE needs a null model, or is that the other way around?????
>>> 
>>> I always feel like an amateur when playing with RS-232.....
>>> 
>>> Bob
>>> 
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