Hi, I'm just looking for an accurate standard for my GSPDO PLL coding. As it is, I've been depending on others who have these to tell me the code works. I understand that when these are retuned to 10MHz, they're .005Hz off due to the DDS. I'm good with that. =)
Bob >________________________________ > From: Bob Camp <[email protected]> >To: Discussion of precise time and frequency measurement <[email protected]> >Sent: Tuesday, September 17, 2013 7:30 PM >Subject: Re: [time-nuts] My FE-5680A Came In Today > > >Hi > >Keep in mind that these things make a pretty awful 10 MHz standard. They are >spur monsters in a big way. They won't drive your counter nuts, but for >anything that wants signal purity - watch out. > >Bob > >On Sep 17, 2013, at 8:14 PM, Bob Stewart <[email protected]> wrote: > >> Hi Bob, >> >> Yeah, I figured that retuning it would lose the 1PPS. No biggie. There are >> a number of those little connectors in this device, and the two that have >> cables connected use a flat 90 degree connector with a coax that's a bit >> smaller than RG-174. I just want to snap a pigtail on it and lead it out >> through a notch in the cover where the DB-9 connector is. There are several >> examples on the web where people solder wires to the connector and to the >> RS-232 header. I'd just as soon avoid soldering wires if I can. >> >> Bob >> >> >> >> >> >>> ________________________________ >>> From: Bob Camp <[email protected]> >>> To: Discussion of precise time and frequency measurement >>> <[email protected]> >>> Sent: Tuesday, September 17, 2013 7:06 PM >>> Subject: Re: [time-nuts] My FE-5680A Came In Today >>> >>> >>> Hi >>> >>> If you retune it, you probably will throw off the pps. The pps drive >>> strength is a bit weak, so you need to be careful looking for it. On some >>> units there is a software command to enable / disable it (as in pps only >>> when warmed up and locked - like a gps). The can / cover on the unit is mu >>> metal (Rb's are mag sensitive). If you drill a hole in it, you are likely >>> to impact it's mag shielding properties. >>> >>> Bob >>> >>> >>> On Sep 17, 2013, at 6:21 PM, Bob Stewart <[email protected]> wrote: >>> >>>> My FE-5680A Rb standard came in today. After the usual inspections etc, I >>>> fired it up and I have the purple haze. The native output is 8.38860798/9 >>>> (last digit jitter) as read on my 5335A using my GPSDO as an external >>>> standard. I've got a ways to go before it's all setup, but this is >>>> looking good. Does it warmup and change frequency at all, or can I retune >>>> it to 10MHz and use it as a reference without any further ado? >>>> >>>> Can someone tell me what type of socket that is where you tap off the RF? >>>> It looks sort of like a uFL connector, but a bit bigger. I'd rather avoid >>>> hacking and soldering on this if I can. >>>> >>>> Bob - AE6RV >>>> _______________________________________________ >>>> 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. > >_______________________________________________ >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.
