Hi A $0.15 each dual / quad / hex / octal buffer IC’s will get you > 15 dbm per pair of gates. For under $10 in active parts you can have 30 or 40 outputs. I suspect that if you look inside the 3812 that’s exactly how they are generating the 10 MHz you are looking at.
Bob > On Oct 31, 2014, at 7:01 PM, Graham / KE9H <[email protected]> wrote: > > Bill: > > On cable TV systems, 50 MHz to 500 (or higher) are the forward channel. > (Head-end to client.) > Below 30 MHz is the reverse channel, for data going from the client to the > cable company. > The band 30 to 50 is a cross over zone for the band splitting filters. > > > It is designed to not amplify the forward direction below 50 MHz. > > --- Graham > > == > > On Fri, Oct 31, 2014 at 4:07 PM, Bill Riches <[email protected]> > wrote: > >> Hi Bob, >> >> I connected 10 MHZ test jack output to a 15 db el-cheepo CATV amp and the >> output of that to a 4 way splitter. Splitter outputs went to 3336-3586 and >> counter. All seem to like the ref signal. Output of the amp takes makes >> the semi-square wave into a sick saw tooth. Amp is only rated from 50 to >> 500 mhz so strange things are happening with 10 MHZ input. Other CATV amps >> do have better low fx response - will play with that later. >> >> I have 10 mhz pulse from Lucent into trigger input of 465 scope and >> Thunderbolt gps output into vertical input of scope. Time base is set for >> .01 Usec per div. I notice that trace moves right to left then left to >> right about every 5 min or so. Moves about 3 div before changing >> directions. Why? Is the Lucent still making a list? It has only been on >> for a few hours. It takes about 10 min for GPS to go out from a cold >> start. (My Thunderbolt and RB do not change direction when using one as >> trigger and the other for vert input to scope) >> >> I ordered a USB to RS422 converter cable - will be here next week. What >> program is sort of working? Using Windoze 7 64bit and have an old XP >> machine available. >> >> Sure do appreciate all the info from our time nuts gurus! >> >> 73, >> >> Bill, WA2DVU >> Cape May, NJ >> >> >> --- >> This email is free from viruses and malware because avast! Antivirus >> protection is active. >> http://www.avast.com >> >> _______________________________________________ >> 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. _______________________________________________ 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.
