> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Predrag Dukic > Sent: Wednesday, September 24, 2008 1:23 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] TBOLT communication > > > > > Lux, > > my hardware experiences confirm that +-6V is marginal. Some > devices work, some do not. > The problem is a charge pump chip inside the converter and > not the Prolific interface chip itself. > (It generates ttl levels anyway). > > All converters I saw till now are two chip solutions (usb > chip and level translator with internal charge pump to > produce +- supply. > > Predrag > >
And they are a very cost sensitive product, so they're not going to put any bigger capacitor on the charge pump than absolutely necessary. Jim _______________________________________________ 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.
