Hi Any data on the measured phase noise performance at 10 MHz?
Bob > On Nov 18, 2014, at 3:20 PM, pch.tns <pch....@gmail.com> wrote: > > Hi all > > The easiest setup to get 10MHz out of the15MHz is using a SiLabs5351C and > program it 15MHz in and 10MHz out. You have 8 outputs you can define. > Pics of my setup here > <https://www.dropbox.com/s/h5qrxwfb3fkshen/IMG_1465.JPG?dl=0>and here > <https://www.dropbox.com/s/jvg6vebxih8ih2s/IMG_1466.jpg?dl=0>. I am using > this for all my SDR’s and conventional Rx/Tx with 10 MHz ref inputs. Works > great. > > Rgds > > Peter, HB9DQY > > > >> On 18 Nov 2014, at 15:09, Don Murray via time-nuts <time-nuts@febo.com> >> wrote: >> >> TNX Paul and Anthony... >> >> More questions... ;-) >> >> I see that the REF1 type unit outputs 15MHz... >> >> The REF0 unit has both 15MHz and 10MHz... >> >> So, if I am going to use GPS, I need REF1, but it only does 15MHz out, >> and I need 10MHz for my stuff... so how do REF1 and REF0 interface?? >> Or does it work that way?? >> >> TNX guys!! >> >> >> 73 >> Don >> W4WJ >> >> >> >> >> >> >> In a message dated 11/18/2014 12:28:06 P.M. Central Standard Time, >> paulsw...@gmail.com writes: >> >> In the picture its the top unit ref1 and its the left hand TNC and it does >> power the antenna. >> If no antenna you need to tie a resistor to ground on the tnc to fake it >> out. >> Regards >> Paul >> WB8TSL >> >> On Tue, Nov 18, 2014 at 11:49 AM, Anthony Roby <ar...@antamy.com> wrote: >> >>> If you search through the recent messages, you'll see a link to a set of >>> photos I posted. This one >>> https://drive.google.com/file/d/0B5tlecUITRBLc3JyMElTdUwzMHM shows the >>> front of the units. J7 provides the GPS power. >>> >>> Anthony >>> >>> -----Original Message----- >>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Don >>> Murray via time-nuts >>> Sent: Tuesday, November 18, 2014 10:30 AM >>> To: time-nuts@febo.com >>> Subject: [time-nuts] STUPID QUESTION: Lucent KS-24361, HP/Symmetricom >>> Z3809A, Z3810A, Z3811A, Z3812 >>> >>> Hello all... >>> >>> Just getting up to speed on the KS-24361... >>> >>> My stupid question (s)... >>> >>> Where does the GPS antenna connect?? >>> >>> Does the GPS antenna port power the antenna? >>> >>> Need a replacement for my dead HP Z3816A... ;-( >>> >>> TIA... >>> >>> >>> >>> 73 >>> Don >>> W4WJ >>> >>> >>> >>> In a message dated 11/18/2014 3:26:52 A.M. Central Standard Time, >>> m...@alignedsolutions.com writes: >>> >>> One of my Z3805's (with the double oven 10811 ocxo iirc) also performs >>> similarly at times to the 58503A mentioned by Said. From an adev >>> perspective >>> it's close to my BVA at some tau's (around a hundred seconds or so >> iirc.) >>> At times though the output seems to "jump" in frequency. My other >> Z3805 >>> from the same source doesn't work as well. >>> >>> None of the 10811's in my various pieces of test gear (some of which I >>> basically purchased to get the 10811's) worked all that well from an >> Adev >>> perspective. I used to buy HP5328 counters on the usual auction site >> with >>> 10811's and the 500MHz C channel for quite low prices. At least I >>> still have >>> a nice collection of frequency counters. >>> >>> >>> Sent from my iPad >>> >>> On 2014-11-17, at 1:23 PM, Said Jackson via time-nuts >> <time-nuts@febo.com >>>> >>> wrote: >>> >>>> Correct on all counts Bob. >>>> >>>> My two 58503A units from China are great for both ADEV and PN >>> measurements, better than anything else I have as a combo (I have Wenzel >>> ULNs for even lower PN testing but they don't have any usable ADEV). I >>> also have a costly BVA and it can't compete against the HP unit. >>>> >>>> Those 10811s just rule. >>>> >>>> In fact my only complaint about the 58503A are the 60Hz related small >>> spurs you can see in the plots... >>>> >>>> Bye, >>>> Said >>>> >>>> Sent From iPhone >>>> >>>>> On Nov 17, 2014, at 12:28, Bob Camp <kb...@n1k.org> wrote: >>>>> >>>>> Hi >>>>> >>>>> The 58503 is a Z3801 with a pretty instrument style package put >>>>> around >>> it - right? >>>>> >>>>> If so, it might / should have a 10811 in it rather than an MTI OCXO. >>> The 10811 is rated for -155 dbc at 100 Hz. That is much better than the >>> noise floor that the MTI ??s seem to produce at 100 Hz. About the only >>> other GPSDO OCXO that gets to that level is the one in the original >> TBolts >>> . There you very much have to deal with spurs. That make the noise floor >>> of limited use in a practical system. >>>>> >>>>> Bob >>>>> >>>>>> On Nov 17, 2014, at 2:26 PM, saidj...@aol.com wrote: >>>>>> >>>>>> Hi Bob, >>>>>> >>>>>> yes, the 10MHz plot is rotten, no doubt. The 15MHz plot is quite >>>>>> good >>> till about 40Hz offset, then it becomes pretty rotten too. >>>>>> >>>>>> Here is one of my 58503A units (using the 10811 OCXO) as a >>> comparison.. measured against our DROR-IIA (this plot was actually done >>> to show the DROR-IIA PN, but since that unit actually has less noise and >>> spurs than the 58503A we can simply use it as the reference for this >>> purpose). >>>>>> >>>>>> The good news is that getting the close-in phase noise to be good >>>>>> is >>> very hard to do and the unit delivers that out-of-the box already. >>> Filtering out the noise and spurs above 40Hz offset is pretty easy to >> do. >>> It should be fairly straight forward to cobble up a small PN filter for >>> those units to get rid of the noise and spurs above 40Hz offset. >>>>>> >>>>>> bye, >>>>>> Said >>>>>> >>>>>> In a message dated 11/17/2014 09:31:46 Pacific Standard Time, >>> kb...@n1k.org writes: >>>>>> Hi >>>>>> >>>>>> Here ??s the phase noise on the 15 MHz. There are a few spurs, and >>>>>> an >>> very real hump out at the likely frequency of the Lucent switcher. The >>> 15 MHz is pretty clean compared to most /all of the other units I ??ve >>> seen on the surplus market. >>>>>> >>>>>> I would not multiply this up to 40 GHz with a broadband multiplier. >>>>>> I >>> would be quite happy to run it into a PLL with a rational bandwidth. You >>> will beat the noise on the output with a fairly simple VHF VCXO past 100 >>> Hz. >>> No reason to have a bandwidth outside the 20 to 80 Hz range. >>>>>> >>>>>> Math: >>>>>> >>>>>> 15 MHz to 150 MHz -> 20 log (N) -> 20 db. >>>>>> >>>>>> -140 dbc / Hz shown below at 100 Hz offset -> -120 dbc/Hz >>>>>> >>>>>> You can get numbers better than -120 dbc/Hz at 100 Hz offset out of >>>>>> a >>> number of pretty simple VHF VCXO circuits. Bert has one that seems to >>> work fine for him. >>>>>> >>>>>> Bob >>>>>> >>>>>> <DROR-IIA_Phase_Noise.png> >>>>> >>>> _______________________________________________ >>>> 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. >>> _______________________________________________ >>> 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. >>> >> _______________________________________________ >> 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. > > _______________________________________________ > 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.