> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Griffiths > Sent: Saturday, April 26, 2008 8:51 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] RS485/422/232 Chip > > > Any idea of the jitter of the Analog Devices transformer > coupled isolators? > > Bruce > Bruce,
That should be easy enough to check. I believe they use the 300MHz clock gated, so the jitter is probably at least equal to the clock period, and probably more if they use envelop detection. I have not come around to doing that yet (all I know is that they have no problem getting my 9600 baud serial data across :-) I will check with the scope first, then if it looks good, I will put the 5370 on it. The LTC part uses capacitive coupling instead of transformers, but they do not say if they use an RF carrier, or simply on/off pulses. I could check that one too. I will let you know. Didier Internal Virus Database is out-of-date. Checked by AVG. Version: 7.5.519 / Virus Database: 269.22.5/1358 - Release Date: 4/3/2008 6:36 PM _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
