Re: [time-nuts] Noise contribution of PLL on measuring phase noise

2017-06-28 Thread Thomas S. Knutsen
up so this issue is hardly > unique to the > loop amp. > > Bob > > > On Jun 28, 2017, at 6:29 AM, Thomas S. Knutsen <la3...@gmail.com> wrote: > > > > Hi. > > > > When measuring Phase Noise using PLL, what noise would be contribuded > from > >

[time-nuts] Noise contribution of PLL on measuring phase noise

2017-06-28 Thread Thomas S. Knutsen
. Thomas. -- With Best regards, Thomas S. Knutsen. Please avoid sending me Word or PowerPoint attachments. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

[time-nuts] TEMEX / Spectracom EC2S GPS 10MHz clock

2017-08-06 Thread Thomas S. Knutsen
(-10V, 5V, 3.12V). If anyone have any idea on where to get service info on this receiver, it would be most helpfull. -- With Best regards, Thomas S. Knutsen. Please avoid sending me Word or PowerPoint attachments. ___ time-nuts mailing list

Re: [time-nuts] Another LORSTA mast bites the dust...

2017-10-04 Thread Thomas S. Knutsen
@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- With Best regards, Thomas S. Knutsen. Please avoid sending me Word or PowerPoint attachments. _

Re: [time-nuts] VNA design

2014-06-02 Thread Thomas S. Knutsen
The design of an VNA is an interesting thing. It requires quite high focus on good RF practices and screening. In the range 0-3GHz there is no low cost devices avaible, not counting the copper mountain tech boxes ( http://www.coppermountaintech.com/ ). Up to 1.3GHz there is the DG8SAQ VNWA

Re: [time-nuts] LTE-Lite module

2014-10-18 Thread Thomas S. Knutsen
The potatochips are quite excelent high speed devices, and by selling them on e-bay, they make it avaible to us who are not able to go through the normal supplier chains. Br. Thomas. 2014-10-19 2:48 GMT+02:00 Tom Miller tmiller11...@verizon.net: This looks pretty interesting: 74G series

Re: [time-nuts] Si5351A

2014-11-11 Thread Thomas S. Knutsen
John Miles did the phase noise measurments, they are avaible here: http://nt7s.com/2014/11/si5351a-investigations-part-7/ BR Thomas. 2014-11-11 21:49 GMT+01:00 Joseph Gray jg...@zianet.com: Some of you have probably already heard of this new clock generator chip from Si. News of a board

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Thomas S. Knutsen
This week it may be Visual Studio, avaible from: http://www.microsoft.com/visualstudio/eng/products/visual-studio-express-products 73 de Thomas 2012/10/9 Bob Camp li...@rtty.us Hi I'm not sure I'd call it Basic, but Microsoft has VB Express (or what ever they call it this week) for free if

Re: [time-nuts] matlab, python, etc.

2013-01-07 Thread Thomas S. Knutsen
An semester or two with linear algebra is an good start, but the homepage of matlab have an excelent learning section. No experience with Octave yet. MIT OCW (open courseware) have lectures on linear algebra, in addition to most of the other courses offered at MIT. BR. Thomas. 2013/1/7 Attila

Re: [time-nuts] GPIB, Proloigix, cables

2013-01-27 Thread Thomas S. Knutsen
What you can do, is to have the program know the addresses and status code of the items on the bus, then do an serial poll to get the status of each item on the bus. It wont work on all items, but it should be possible to avoid problems like the one you describe and instrument not turned on. In

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

2013-02-05 Thread Thomas S. Knutsen
There seems to be someone thinking that all LORAN-C stations are shut down, and this is not correct. I know first hand from the Eidi and Bø chain, that both are drifted by their host nations, as this responcibility was transfered to them from the USCG in 1995. I beleve most on foregin soil are

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread Thomas S. Knutsen
Based on that PCB, I want to see an sweep to at least 1GHz. The reason is that experience have shown that the inductance (perhaps 10nH) in series with C2 and C6 would damage the stop-band rejection at UHF. Used with an OXCO this would not matter, but the desire to make the ultimate filter is

Re: [time-nuts] 10 MHz low pass filter

2012-06-20 Thread Thomas S. Knutsen
elements, they rotate adjacent inductors to reduce mutual inductance. 10MHz is probably too low in frequency for practical stripline. You could probably do active filters these days, but the power budget would not be trivial. -- *From: * Thomas S. Knutsen la3

Re: [time-nuts] Follow-up on Z3801A high EFC reading

2011-07-16 Thread Thomas S. Knutsen
I think it is in Matthys, Crystal oscillator circuits. Can't quote page number now, as my verson is somwhere I cant remember. It's an excellent book if you do some experimentation. I did write an letter to R.J. Matthys a couple of years ago, and reveiced an answer. 73 de Thomas LA3PNA/AE5YS.

Re: [time-nuts] Thunderbolt GPS rollover

2011-10-19 Thread Thomas S. Knutsen
I do assume this is because of the 1024 week cycle? if so would it be possible to tell the GPS what cycle it should be? Would the 10MHz out still be accurate? BR. Thomas. 2011/10/20 Mark Sims hol...@hotmail.com: On July 30,  2017 all our Thunderbolts turn into back-dated pumpkins...

Re: [time-nuts] Z3801A's

2012-01-13 Thread Thomas S. Knutsen
I bougth one, and it seems like they have replaced the firmware with the one from 58503A. When sending *IDN to it, it responds with HP 58503A. Thomas. 2012/1/13 Hal Murray hmur...@megapathdsl.net - Does anybody know what Z3801A has been upgraded by us, which the feature is the

Re: [time-nuts] FE-5680A Mechanical Question

2012-01-13 Thread Thomas S. Knutsen
GPIB is not realy slow by todays standars. It's still capable of transfering more data pr sec than USB 1, there is some notes about it at NI. The Prologix box consist of an an microcontroller and an USB chip or such, but the programming involved in order to get it all working is extencive if you

[time-nuts] Thunderbolt no usable sats.

2011-06-11 Thread Thomas S. Knutsen
I bougth an Thunderbolt off E-bay some time ago, to use as reference for my spectrum analyzer and signal generators. I had it connected up with a couple of power supplies and it worked as it should. Today I put together an voltage inverter to get the -12V to the GPS in order to use it with an

Re: [time-nuts] Thunderbolt no usable sats.

2011-06-16 Thread Thomas S. Knutsen
Thanks for all the information, this is an great group. Does anyone have the shematic on the box? BR. Thomas. 2011/6/12 Ed Palmer ed_pal...@sasktel.net: Is there more than one hardware version of the T'bolt? Mine has U18 (right behind the RS-232 connector) as an Intersil ICL232IBE.  This is

Re: [time-nuts] Minicircuits specs

2014-11-29 Thread Thomas S. Knutsen
2014-11-29 16:24 GMT+01:00 Dave M dgmin...@mediacombb.net: Yeah, that's a good way to completely avoid the issue. Since I'm the only target audience for my efforts, then I don't mind the extra components. I'm beginning to realize, as I get deeper into building my own stuff, that a VNA is

Re: [time-nuts] End of Loran-C in Europe confirmed.

2015-12-17 Thread Thomas S. Knutsen
>From what I understand there have been some strongly worded letters from the russian goverment to the norwegian with regards to the shutdown of Bø chain (Jan Mayen, Bø in Vesterålen and Berlevåg) all in Norway. The russians dont seems to happy with the loss of LORAN, specialy when aurora borealis

Re: [time-nuts] Loran-C Norway/France/Germany shutdown

2015-12-31 Thread Thomas S. Knutsen
FWIW, Loran-C at Jan-Mayen was shut down at 1200NT (1100UTC). Info from: http://jan.mayen.no/nyheter/en-aera-er-forbi/ I will check with a friend at Bø station on monday regarding the rest of the norwegian stations. BR. Thomas. 2016-01-01 3:16 GMT+01:00 GandalfG8--- via time-nuts