> From: Unruh <unruh-s...@physics.ubc.ca> > Date: Thu, 30 Apr 2009 14:24:12 GMT > Sender: questions-bounces+oberman=es....@lists.ntp.org > > Nathaniel Homier <n...@universal-mechanism.org> writes: > > >Hello. > > >I would like to know if one can use the line audio out of any old > >portable shortwave radio tuned to a time signal and fed via a line audio > >input. This would be motherboard audio. The primary reason is that I > >get the impression that ntp radio clocks are for sale at very high > >prices. The most I have to spend is about $200. I already have very > >nice Sony 7600G HF portable and that gets the time freq. from 2.5 to 15 > >very well. My computer is the new pci express and I have no serial port. > > If you have $200, why not get a GPS 18LVC for about $70 and pay your local > radio hobbyist to install an RS232 plug and a USB poser plug. That way you > wil get microsecond rather than millisecond accuracy.
He says that he lacks a serial port. That leaves USB which is a terrible choice, so... Does the card really lack any serial support? While more and more mobos lack a serial connector, most still have a serial interface. (I have never seen wone that does not.) It is usually presented on a header and you can bring it out to a standard connector, usually one mounted to fit in a card slot, but having no card, so it just replaces a blank panel. There is also often a need to enable the second serial port, either in BIOS or via a jumper or switch on the mobo. The mobo documents should cover this and are a;most certainly available from the manufacturer's web site. If the card really lacks serial support, please post the make and model so people can avoid it. (And not just because of NTP.) -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: ober...@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
