[time-nuts] Z3805 utility, Was: AW: (no subject)
rbenward at verizon.net
Mon May 24 01:29:16 UTC 2010
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.
----- 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)
> 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
>> 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.....
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