Hi So how does the 5 MHz get into the FPGA and / or CPU?
In order to discipline the OCXO and to generate the PPS, there must be a path. If that path is independent of the 15 MHz (or 15 and 10) multiplier(s) then you have a lot of things you can do. If either of the existing multipliers need to be kept running, that limits you a bit. Bob > On Dec 3, 2014, at 8:40 PM, paul swed <[email protected]> wrote: > > On the output of the crystal oscillator you will want to buffer it and then > do whatever you like. Its a sine wave and as I recall of fair level several > volts. I did see a bit of distortion on the sine wave. It can be obtained > at J8 the unpopulated jack. > Now back to putting it in its case. > Regards > Paul > WB8TSL > > On Wed, Dec 3, 2014 at 7:33 PM, Gerhard Hoffmann <[email protected]> wrote: > >> Am 04.12.2014 um 00:04 schrieb paul swed: >> >>> Have successfully tapped into the clean 10 MHz of the the Lucent and using >>> a EL2020 50 Mhz current opamp have a very nice 10 Mhz sine wave out. Any >>> spurs are down at least 43 db. Close in at 4Khz total span or 500 Hz/div I >>> don't see anything down to at least 65 db. Thats the best detail the HP >>> 8568B will allow. >>> >> >> Congrats! >> >> >> Can't help to ask some questions: >> The MTI-260, is that a CMOS level or a sine output version on 5 MHz? >> Where I'm right now, I have the Lucent pair, one of them dismantled, >> but no power supply & no scope, that has to wait until the weekend. >> >> I'd like to make a small board that directly takes the 5 MHz from the >> Osc, buffers it, doubles it with the NIST FET doubler and provides 4 SMA >> +12dBm outputs at 10 MHz via 4*AD8009 or LMH6702. >> There is enough free space on the front plate. >> I'd like to hear that the osc delivers a sine, since that makes >> doubling easier. >> >> BTW I have another 10 MHz MTI-260 and did measure phase noise with >> an E5052B. That was not so funny. Probably it's orientiented towards >> long term stability at the cost of noise with absolutely minimum crystal >> dissipation. I'd like to repeat the measurement under better controlled >> environmental conditions b4 I tell numbers. >> But it seems that Morion rulez, noise-wise. >> >> regards, Gerhard >> >> >> >> _______________________________________________ >> 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.
