On Wed, Sep 26, 2012 at 11:59 AM, Majdi S. Abbas <m...@latt.net> wrote: > On Wed, Sep 26, 2012 at 11:38:10AM -0700, Chris Albertson wrote: >> The first stepis to simply use a regular PC, maybe running Linux. >> This is the easiest and fastest platform to develop on. It gets >> harder and takes longer if you use a smaller and more esoteric >> platform like a DSP or FPGA. Using a quad core Intel chip is gross >> over kill but it allows for quick development. Later with working >> software you have actually measurements in hand and can pick a "right >> size" processor. > > Normally I'd agree with you but where 60 KHz signals are > concerned, I think I'd rather not use a PC. There's just too much RFI.
If I do this the PC would likely be a good large distance from the RF front end. With an SDR type receiver you'd place the RF stuff very close to the antenna and the long cable from RF section to computer is a balanced audio cable, like an XLR microphone cable. By current 60MHZ WWVB receiver lives outdoors inside a 1 foot length of PVC pipe far from the house. Only serial data leaves the pipe and DC power goes in. Also the RFI from a PC depends on who built it. Typical self-assembled computers are very poor. Notebooks can be good. bUt thebest plan is to use the inverse square law and some distance and RFI goes away. Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.