Re: [time-nuts] Comparing 10 MHz Oscillators at 10 GHz

Some related measurements on 10GHz at http://www.qslnet.de/member/on4iy/9912.html Of course, the objective was not really to measure 10MHz, but rather to mimic XO PN at 10GHz using a DDS for the system as a whole (whatever that means). - the 20logN is followed very well outside the PLL loop,

Re: [time-nuts] what is the best way to multiply a 10 Mhz signal?

You may want to check out the 10MHz locked 1GHz clock I did (using ADF4107 and a 1GHz Crystek CVCO) http://www.qslnet.de/member/on4iy/1gclock/xlock-1g.html and associated DDS to generate oddbal frequencies. http://www.qslnet.de/member/on4iy/9912.html Includes some PN measurements. Xtof. On

Re: [time-nuts] Frequency counter recommendation

LFCSP (QFN) with 0.5mm spacing is very easy to do... have done about a dozen (AD9912) with nil failures using just solder paste, a $50PID controller and a $20 oven. refs all around on the web. You may get a bridge here and there but you can wick them away ;-) easily. QFP has leads so is even

[time-nuts] FS Rb track/hold was [Re: GPS jamming susceptibility]

On that subject, I have a Symmetricom chassis for sale with Rb track/hold (dual PRC inputs I believe, with room for a second holdover card, dual power supply, and 16 2048Khz outputs - more reduncancy than you would want). Can go at time-nut price before it goes on auction. + ship from 3000 BE.

Re: [time-nuts] A real-world precision timing need....

XBEE PRO XSC + PIC can do datalink this for about 75$ / observation point, if you don't require high throughput Xtof. Finding a suitable data-link is much more an issue than the time-scale and time-stamping issues, which could be done with sufficient precision for not too much money and

Re: [time-nuts] HP-5342A Questions

A matching fuse is Siba Elu 096000.0,125 or new model Siba Elu 196000.0,125 I think. http://www.siba-fuses.com/front_content.php?idart=117nummer=196000.0,125 Regards, Christophe On 30/08/10 03:53, Mark Gulbrandsen wrote: I recently aquired an HP- 5342A microwave counter. It has a blown fuse

Re: [time-nuts] HP 11729C versus 11848A

___ 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. -- Christophe Huygens Dept. Computer Science E-mail: christophe.huyg...@cs.kuleuven.be

[time-nuts] FS Symmetricom timing system

Have for sale TS-3100 GPS time source and HP/Symmetricom 54400 unit, with auto Rb holdover and 10MHz and 16*2,048 MHz out. Fully functional including the downconverting antenna and pdf docs. Looking for time-nut/ham amateur price point, not pro. Ex Enron labs. 73 xtof on4iy

Re: [time-nuts] Realistic Tbolt phase noise

This is with the power supply as provided by TAPR so should be ok. Xtof. On 09/03/10 13:44, Bob Camp wrote: Hi Power supply noise would be the first thought. Next up would be grounding inside the Thunderbolt (card to case, connectors to case). Bob On Mar 9, 2010, at 7:32 AM, Christophe

[time-nuts] Realistic Tbolt phase noise

Hi, I noticed several vendors on Ebay have the t-bolt on sale. However, the once showing their own PN plots seem to get only -115, -120 dBc/Hz at 100Hz. Yet, http://www.leapsecond.com/pages/tbolt/noise.htm seems to have mucht better results: up to -150 depending on power supply. By multiplying

Re: [time-nuts] Realistic Tbolt phase noise

and 7812 regulator on the TBolt came up. If you have +14 available that seems like the best thing to try. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Christophe Huygens Sent: Tuesday, March 09, 2010 7:50 AM To: Discussion

Re: [time-nuts] OT: Practical PLL low noise?

Hello Francesco: you can use my xlock, http://www.qslnet.de/member/on4iy/xlock/xlock.html You will have to add a varicap to make the XO into a VCXO. There should not be any noticable noise increase due to the PLL - make sure you use a good reference 10MHz in yr GPSDO! 73 xtof on4iy On 02/02/10

Re: [time-nuts] Multiple Voltage monitoring

Let me quickly plug http://www.hw-group.com/products/sensors/Sens-UI_en.html I have found these guys to be cheap and good, when I had remote Temp monitoring needs. They have other cool stuff too. Worth a look. Xtof Matt Ettus wrote: DC, 0 to 6V, 10mV or better resolution. Thanks, Matt

Re: [time-nuts] Generating 66.666...MHz from 10MHz

My solution is to lock a 1GHZ Crystek resonator to 10MHz, and then use this to drive a DDS AD9912. Recent generations of DDS are quite impressive. http://www.qslnet.de/member/on4iy/9912.html Xtof. Murray Greenman wrote: Here's an idea which actually works (I tried it). Rather than lock at

Re: [time-nuts] GPSDO project

Consider a 2nd hand low phase noise source like a PTS-160. Best regards, Xtof. Brad Dye wrote: Many thanks to all who responded to my request for help on this project. The SDR-IQ (http://www.rfspace.com/SDR-IQ.html) already has a built-in 66.6667 MHz osc, I just want to make it more stable

[time-nuts] Z3801A phase noise measurements

Hi, does anybody has actual data on this? Must have overlooked it somehow. There seems to be a large discrepancy between unit specs and the OCXO it uses. Just looking for some more accurate input for simulations. Thanks, Christophe begin:vcard fn:Christophe Huygens n:Huygens;Christophe

Re: [time-nuts] Z3801A phase noise measurements

Christophe Huygens wrote: Hi, does anybody has actual data on this? Must have overlooked it somehow. There seems to be a large discrepancy between unit specs and the OCXO it uses. Just looking for some more accurate input for simulations. Thanks, Christophe I did finally find happiness

[time-nuts] Close-in phase noise measurements

Hi, I am continuing my phase noise measurement quest. I gathered equipment (HP 8662a/11729C/8568B/multipliers) to measure 100Hz+ from the carrier. I now need to get a grip on the 0.1-100Hz range, which is where most of my applications are. What is the suggested measurement methodology for this

[time-nuts] 5370B practical question

Hi, I am trying to start some Allen Deviation measurements on some VCXOs I have built those for 117, 106.5 and 123MHz (amateur radio use). The phase noise it not my primary concern (for now) but short term stability is (systems are locked to GPS etc). I would like to more formally

Re: [time-nuts] 5370B practical question

Christophe Huygens wrote: Hi, But at 123.5MHz, about 1 in 5 measurments, there is a 1Hz jump... the instrument showing 122.98005 in stead of 999005. I never notice 100, 500 mHz jumps, only +/-20 and (+/-20 - 1000). 998995 in stead of 95 I don t know much about the internals

[time-nuts] Raltron OX-6000D-L1-10-50.000-TN

Hi, does anybody have specs for the 6000 series... not on the site. This XO seems to have 3 outputs. Thanks, Christophe begin:vcard fn:Christophe Huygens n:Huygens;Christophe org:K.U.Leuven;Dept. Computerwetenschappen adr;dom:;;Celestijnenlaan 200A;Heverlee;;3001 email;internet:[EMAIL

Re: [time-nuts] 20logN was Re: phase noise questions (long)

bounce status... Does anybody else see this phenomenon. It is a bit irritating to have to go to the archive page to read up. Thanks, Christophe Christophe Huygens wrote: Hi John, Steve, et al, While I am not a phase noise buff at all, in talking to many on this subject I feel

[time-nuts] 20logN was Re: phase noise questions (long)

Hi John, Steve, et al, While I am not a phase noise buff at all, in talking to many on this subject I feel that this is not well understood. When I ask where the 6db/Hz for doubling or 20logN in general comes from, I very often get an unsatisfying answer and I have seen strange notes on this

[time-nuts] HP/Symmetricom Mini SSU help

conditioned 10MHz from the backplane of this system... No service manuals in sight. I have 2 2M/2048kHz output cards. Any help is appreciated. The Rb nicely tracks the PRS, but if you only have 2.048Khz out, it is not very useful. Thanks, Christophe Huygens begin:vcard fn:Christophe Huygens

[time-nuts] Password recovery on Symmetricom TS3000/3100

, Christophe Huygens Dept. CS, KULeuven Christophe Huygens [EMAIL PROTECTED] Gastdocent Dept. Computerwetenschappen - K.U.Leuven DistriNet Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm begin:vcard fn:Christophe Huygens n:Huygens;Christophe org:K.U.Leuven;Computer Science Dept. adr