[time-nuts] Synthesizer Unit (A1) For An HP 8061B

All:   You may recall that I posted a series of questions several months ago regarding my HP 8061B.   In summary, I was finding that the system would appear to lock but the continuous operation LED would not come on.   Several people who frequent this board offered some very good suggestions.  O

Re: [time-nuts] good book on the history of calendars?

> christopher hoover skrev: > >> We have the wonderful Dava Sobel book on longitude and Harrison. I'm >> hoping to find something equally as excellent and accessible on calendars. >> >> >> >> Can anyone recommend a good book on the development of calendars, ideally >> from Caesar on? >>

[time-nuts] Common sky pps errors for any GPSDOs?

I am working with someone who needs to have time synchronized reception of signals in various locations which are separated by less than 100 km. This is a situation similar to VLBI, but since the distances are shorter, the center frequencies are lower, and the integration times are much shorter, w

Re: [time-nuts] Common sky pps errors for any GPSDOs?

> -Original Message- > From: time-nuts-boun...@febo.com > [mailto:time-nuts-boun...@febo.com] On Behalf Of Matt Ettus > Sent: Monday, January 05, 2009 11:31 AM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] Common sky pps errors for any GPSDOs? > > I am

Re: [time-nuts] Common sky pps errors for any GPSDOs?

Matt Ettus wrote: > I am working with someone who needs to have time synchronized > reception of signals in various locations which are separated by less > than 100 km. This is a situation similar to VLBI, but since the > distances are shorter, the center frequencies are lower, and the > integrati

Re: [time-nuts] Common sky pps errors for any GPSDOs?

Hi Matt, on Fury we typically see the 1PPS aligned to within +/-25ns or so without calibration when two units use the same antenna feed. There is a good paper on the M12+ receiver's accuracy from Synergy/NIST, they tested five receivers against UTC (at UTC!!). They came up with a baseline

Re: [time-nuts] Common sky pps errors for any GPSDOs?

On Mon, Jan 5, 2009 at 12:13 PM, Lux, James P wrote: > > >> -Original Message- >> From: time-nuts-boun...@febo.com >> [mailto:time-nuts-boun...@febo.com] On Behalf Of Matt Ettus >> Sent: Monday, January 05, 2009 11:31 AM >> To: Discussion of precise time and frequency measurement >> Subjec

Re: [time-nuts] Common sky pps errors for any GPSDOs?

On Mon, Jan 5, 2009 at 1:54 PM, Bruce Griffiths wrote: > > If the application is somewhat analogous to VLBI, then the maximum > (uncorrectable ie random) allowable carrier frequency phase errors > between receivers depends on the integration time. > Maximum integration times for VLBI are typicall

Re: [time-nuts] Common sky pps errors for any GPSDOs?

> -Original Message- > From: time-nuts-boun...@febo.com > [mailto:time-nuts-boun...@febo.com] On Behalf Of Matt Ettus > Sent: Monday, January 05, 2009 2:28 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Common sky pps errors for any GPSDOs? > > On

Re: [time-nuts] Common sky pps errors for any GPSDOs?

Matt Matt Ettus wrote: > On Mon, Jan 5, 2009 at 1:54 PM, Bruce Griffiths > wrote: > > >> If the application is somewhat analogous to VLBI, then the maximum >> (uncorrectable ie random) allowable carrier frequency phase errors >> between receivers depends on the integration time. >> Maximum int

Re: [time-nuts] Common sky pps errors for any GPSDOs?

Matt Ettus wrote: > On Mon, Jan 5, 2009 at 12:13 PM, Lux, James P > wrote: > >> >>> -Original Message- >>> From: time-nuts-boun...@febo.com >>> [mailto:time-nuts-boun...@febo.com] On Behalf Of Matt Ettus >>> Sent: Monday, January 05, 2009 11:31 AM >>> To: Discussion of precise tim

Re: [time-nuts] good book on the history of calendars?

Robert Darlington wrote: > So you want to exclude all of the interesting parts of calendar > history? I personally think most of the fun stuff happened 6-10 > thousand years before that period. I'll take what I can get. I'm not uninterested in earlier calendars, but, yes, I am especially intere

Re: [time-nuts] Common sky pps errors for any GPSDOs?

On Mon, Jan 5, 2009 at 2:56 PM, Lux, James P wrote: > >> -Original Message- >> From: time-nuts-boun...@febo.com >> [mailto:time-nuts-boun...@febo.com] On Behalf Of Matt Ettus >> Sent: Monday, January 05, 2009 2:28 PM >> To: Discussion of precise time and frequency measurement >> Subject: R

Re: [time-nuts] Common sky pps errors for any GPSDOs?

On Mon, Jan 5, 2009 at 3:02 PM, Bruce Griffiths wrote: > Matt > > Matt Ettus wrote: >> On Mon, Jan 5, 2009 at 1:54 PM, Bruce Griffiths >> wrote: >> >> >>> If the application is somewhat analogous to VLBI, then the maximum >>> (uncorrectable ie random) allowable carrier frequency phase errors >>>

[time-nuts] ESI 290A Z-bridge schematics needed

Hi, nuts: I have an operating manual for my ESI 290A impedance bridge, but I need the schematics. If any of you have them or know where I can get them, please drop me a line. Best, Dick Moore ___ time-nuts mailing list -- time-nuts@febo.com To uns

Re: [time-nuts] Common sky pps errors for any GPSDOs?

Matt Matt Ettus wrote: > On Mon, Jan 5, 2009 at 3:02 PM, Bruce Griffiths > wrote: > >> Matt >> >> Matt Ettus wrote: >> >>> On Mon, Jan 5, 2009 at 1:54 PM, Bruce Griffiths >>> wrote: >>> >>> >>> If the application is somewhat analogous to VLBI, then the maximum (uncorrect

Re: [time-nuts] Common sky pps errors for any GPSDOs?

> For the carrier itself absolute phase measurements cant be done. > Such phase measurements only have meaning when modulation is present. Alternating modulation frequency may do it for instance. Choosing a set of modulation frequencies being relative prime to each other alows for several readi

[time-nuts] 8657B HET Switch

I have an 8657B signal generator that does fine at and above 1030MHz but below that, the level is uneven and down about 10 to 15 dBm. I have traced the (or at least a) problem to a defective HET switch, part number 08657-67102, which switches the outputs to the mixer or to the doubler, depending o

[time-nuts] anyone know anything about an Eldorado 784 10ns Time Meter?

I picked up this Eldorado 784 meter for $10, primarily because of its Nixie tubes. However, this meter seems to still work. I really hate to harvest Nixies from working equipment. So can anyone tell me if this is an instrument worth saving? It looks like it can do period and time interval mea

Re: [time-nuts] Common sky pps errors for any GPSDOs?

Hi Matt, having 140ps matching of the 1PPS between units is the equivalent of knowing your antenna position to within ~0.14 feet total error max. Thats less than one inch error per antenna! That would require some serious antenna surveying :) This accuracy is impossible to achieve with ti

Re: [time-nuts] anyone know anything about an Eldorado 784 10ns TimeMeter?

>I picked up this Eldorado 784 meter for $10, primarily because of its > Nixie tubes. > However, this meter seems to still work. I really hate to harvest > Nixies from working > equipment. > > So can anyone tell me if this is an instrument worth saving? It looks > like it can do > period and

Re: [time-nuts] Common sky pps errors for any GPSDOs?

On 1/5/09 9:27 PM, "saidj...@aol.com" wrote: > Hi Matt, > > having 140ps matching of the 1PPS between units is the equivalent of knowing > your antenna position to within ~0.14 feet total error max. > > Thats less than one inch error per antenna! > > That would require some serious antenna su

Re: [time-nuts] Common sky pps errors for any GPSDOs?

On Mon, Jan 5, 2009 at 9:27 PM, wrote: > Hi Matt, > > having 140ps matching of the 1PPS between units is the equivalent of knowing > your antenna position to within ~0.14 feet total error max. > > Thats less than one inch error per antenna! That makes it sound a lot more difficult than it reall

[time-nuts] WANTED: HP 5356A

I need to make some measurements at 8 GHz. Since I have the HP 5355A Plug-In I thought using the 5356A head would be the way to go. Does anyone have one they will part with ? Thanks, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubs

Re: [time-nuts] Common sky pps errors for any GPSDOs?

Hi Matt, I must admit I don't fully understand your requirements. Are you looking for correlation between errors, or absolute UTC accuracy, or short term jitter/wander? If you have two systems with self-surveyed antenna positions, you will likely have 1 - 10 feet of antenna height error i

Re: [time-nuts] Common sky pps errors for any GPSDOs?

On Mon, Jan 5, 2009 at 10:59 PM, wrote: > Hi Matt, > > I must admit I don't fully understand your requirements. Are you looking for > correlation between errors, or absolute UTC accuracy, or short term > jitter/wander? > > If you have two systems with self-surveyed antenna positions, you will >