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 <bill.ric...@verizon.net> 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 -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ 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.