Hi Stanley, Can't help you with the WWV receiver you have, but it sounds like you have a fairly good handle on it. Here is the WEB site for the WWV transmitters.
http://tf.nist.gov/stations/wwv.html >From the menu, select signal format and that page will show the "tick" format >and another link to describe the rest of the modulation format. The >modulation format will give you the blueprint that your receiver follows to >derive its functions. Other menu selections are interesting to, such as their history page. Good luck, Bill....WB6BNQ Stanley Reynolds wrote: > My first post. I became interested in time as the result of time syncing my > network of PCs' time and using my firewall as a time server. I wanted to make > my own network time server using a GPS receiver. The WWV receiver is just for > extra fun also have a WWVB receiver in the works. > > Ebay turned up this receiver board intended for signal light systems which I > have and hope to use. > > HANDAR INC. > 541-6001 > WWV REV B C1990 > MADE IN USA > BD#541-2001 (BAC)-F 895 > > Does anyone have info about this board ? > No luck with Google any tips about where to look ? > > Supply voltage, connector J2 pin-out, data format etc ? > > My visual inspection reveals : > > J1 antenna in > J2 power and data connector 12 pins > > Test points : (L.O.) (DEMOD) (TIME CODE) (RTC) > > It has 3 crystals for 5,10, and 15 MHz single conversion IF 455Khz with 3 > crystal filter. > Receiver IC ST TDA12208 > > Demod section ICs : LM366N-4 LM393N LF353 (part number hard to read on this > last one not 100% sure) > > Processor Intel 80C51FA crystal 11.0592 > Several support ICs 74HC type not listed > > UV EPROM 27C64 socketed with sticker (541) & (2.45) 541 is same as board > part # 541-6001 guess 2.45 is firmware version > > RTC ic OKI THAILAND M6242B with 32Khz crystal > > Power section has 2 ICs LP2951CN think one makes 10V for receiver and one > makes 5V for logic power supply maybe 12V ? > J2 pin 7&8 ground > pin 9 + supply > > Several things I will try if I find no info: > 1) Start at 5 volts supply and ramp up to 12V while watching the 10 and 5 > volt outputs to determine supply. > 2) Read eprom and dissemble firmware code for clue to data format > 3) Trace board to id input and output data pins > > Stanley > > > ____________________________________________________________________________________ > Looking for last minute shopping deals? > Find them fast with Yahoo! Search. > http://tools.search.yahoo.com/newsearch/category.php?category=shopping > > _______________________________________________ > 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. _______________________________________________ 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.
