[time-nuts] 10 MHz over optical fiber?

Hi all, I have to carry a 10 MHz standard frequency signal inside an EMC screened room via fiber optic cable. Not willing to re-invent the wheel, do something like an optical standard frequency link exist on the market? I think it is possible to use standard 100MB LAN transceivers, and POF. Ph

Re: [time-nuts] 10 MHz over optical fiber?

On Mon, 24 Nov 2008 17:33:25 -0800, "Tom Van Baak" <[EMAIL PROTECTED]> wrote: >> Yes. I know of several commecial systems. If you only need to do a short >> jump, then using fairly basic E/O-O/E equipment should work well >> enought. It all depends if you want/can to roll your own or need to buy

Re: [time-nuts] 10 MHz over optical fiber?

It's actually [1]http://www.bb-elec.com for those looking. Bill Ezell -- They said 'Windows or better' so I used Linux. Neon John wrote: On Mon, 24 Nov 2008 17:33:25 -0800, "Tom Van Baak" [2]<[EMAIL PROTECTED]> wrot e: Yes. I know of several commecial systems. If you only need t

Re: [time-nuts] 10 MHz over optical fiber?

It's regular Heliax that's been temperature-conditioned by repeated temp cycling to minimize dielectric size change vs temperature. This minimizes phase shift over length. The cycling affects the foam used as the dielectric, which apparently eventually stops expanding and contractin

Re: [time-nuts] 10 MHz over optical fiber?

On 12/5/08 3:48 AM, "Neon John" <[EMAIL PROTECTED]> wrote: > On Mon, 24 Nov 2008 17:33:25 -0800, "Tom Van Baak" <[EMAIL PROTECTED]> wrote: > >>> Yes. I know of several commecial systems. If you only need to do a short >>> jump, then using fairly basic E/O-O/E equipment should work well >>> enou

Re: [time-nuts] 10 MHz over optical fiber?

f the room. Dave -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Marco IK1ODO -2 Sent: 24 November 2008 15:31 To: Discussion of precise time and frequency measurement Subject: [time-nuts] 10 MHz over optical fiber? Hi all, I have to carry a 10 MHz sta

Re: [time-nuts] 10 MHz over optical fiber?

In message <[EMAIL PROTECTED]>, Marco IK1ODO -2 writes: >Hi all, > >I have to carry a 10 MHz standard frequency signal inside an EMC >screened room via fiber optic cable. > >Not willing to re-invent the wheel, do something like an optical >standard frequency link exist on the market? >I think it

Re: [time-nuts] 10 MHz over optical fiber?

At 16.41 24/11/2008, you wrote: >Why fibre optic? You'll only need to convert back to copper when you get it >in there (unless the kit that needs the 10Mhz reference has optical 10MHz >in), and if you do that you may as well just take it in there using high >quality coax (say RG-400U) and a bulkhe

Re: [time-nuts] 10 MHz over optical fiber?

>HParchive.org has a service note that explains how to use that for >reference frequency distribution. See: http://www.hparchive.com/Bench_Briefs/HP-Bench-Briefs-1985-06-08.pdf from page 4 Peter ___ time-nuts mailing list -- time-nuts@febo.com To un

Re: [time-nuts] 10 MHz over optical fiber?

I'm looking for the same thing, but between buildings over singlemode fiber. I have not evaluated any of these but I've been looking at: http://www.terahertztechnologies.com http://www.highlandtechnology.com/ http://www.luxlink.com/ Scott Marco IK1ODO -2 wrote: > Hi all, > > I have to

Re: [time-nuts] 10 MHz over optical fiber?

L PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Scott Mace > Sent: Monday, November 24, 2008 8:37 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] 10 MHz over optical fiber? > > I'm looking for the same thing, but between building

Re: [time-nuts] 10 MHz over optical fiber?

54-2075 phone > +1(818)393-6875 fax > >> -Original Message- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Scott Mace >> Sent: Monday, November 24, 2008 8:37 AM >> To: Discussion of precise time and frequency measurement >> Subj

Re: [time-nuts] 10 MHz over optical fiber?

You might look at video fiber optic transmitter/receiver. I used one once to carry a certain telemetry signal for the same reasons your are looking for. The fiber optics were analog in this case and rated from 30 hz to 10 Mhz at 1 volt P-P. We had to attenuate the signal going into the tra

Re: [time-nuts] 10 MHz over optical fiber?

Hi Marco ,   You might try firecoms if it's not too hot in there.  (plastic)   Steve --- On Mon, 11/24/08, Marco IK1ODO -2 <[EMAIL PROTECTED]> wrote: From: Marco IK1ODO -2 <[EMAIL PROTECTED]> Subject: [time-nuts] 10 MHz over optical fiber? To: "Discussi

Re: [time-nuts] 10 MHz over optical fiber?

Thanks to all for the quick answers and all the info. As usual, time-nuts is a great resource :-) Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow th

Re: [time-nuts] 10 MHz over optical fiber?

Marco IK1ODO -2 skrev: > Hi all, > > I have to carry a 10 MHz standard frequency signal inside an EMC > screened room via fiber optic cable. > > Not willing to re-invent the wheel, do something like an optical > standard frequency link exist on the market? Yes. I know of several commecial syst

Re: [time-nuts] 10 MHz over optical fiber?

> Yes. I know of several commecial systems. If you only need to do a short > jump, then using fairly basic E/O-O/E equipment should work well > enought. It all depends if you want/can to roll your own or need to buy > a finished product (aka "buy this, and you will be fine!"). Magnus, what's th

Re: [time-nuts] 10 MHz over optical fiber?

Hi; This may fit your needs, Wenzel made a 10MHz reference that was disciplined thru fiber. I am currently using one. It could be easily modified to use battery power. It had very low phase noise. Thomas Knox NIST 4475 Whitney Place Boulder Colorado 80305 1-303-554-0307 [EMAIL PROTECTED] Quo

Re: [time-nuts] 10 MHz over optical fiber?

Hi everyone, In message <[EMAIL PROTECTED]>, Marco IK1ODO -2 writes: >Hi all, > >I have to carry a 10 MHz standard frequency signal inside an EMC >screened room via fiber optic cable. > >Not willing to re-invent the wheel, do something like an optical >standard frequency link exist on the market

Re: [time-nuts] 10 MHz over optical fiber?

In looking at the off-the-shelf boxes, jitter seemed to vary from ps range to tens of ns. Also, how stable is the 34km of fiber... One of the manufacturers I looked at had a 1550nm option, so it's probably not a stretch to get it on a 100GHz ITU grid channel or other CWDM channel. Scott

Re: [time-nuts] 10 MHz over optical fiber?

> > I'm looking into something similar: transmitting an H-Maser signal > > (probably 10MHz) over some 34km using CWDM SFPs. At first > glance this > > seems fairly uncomplicated: get some SFPs, and SFP > connector + cage. > > Use a fast opamp/differential driver to drive the transmitting SFP, > > a

Re: [time-nuts] 10 MHz over optical fiber?

to:[EMAIL PROTECTED] On Behalf Of Scott Mace > Sent: Tuesday, November 25, 2008 1:42 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] 10 MHz over optical fiber? > > In looking at the off-the-shelf boxes, jitter seemed to vary > from ps rang

Re: [time-nuts] 10 MHz over optical fiber?

Hi Didier, everyone, Didier wrote: > By the time you get the signal from the maser through 34 km of fiber optic, > what you get at the end might be not better than a decent GPSDO... That's exactly what I'm trying to work out before I'll actually start building something like that. The JPL device

Re: [time-nuts] 10 MHz over optical fiber?

mitsu, PhD, MBA +1-609-638-5402 --- On Wed, 11/26/08, Paul Boven <[EMAIL PROTECTED]> wrote: From: Paul Boven <[EMAIL PROTECTED]> Subject: Re: [time-nuts] 10 MHz over optical fiber? To: "Discussion of precise time and frequency measurement" Date: Wednesday, November 26

Re: [time-nuts] 10 MHz over optical fiber?

[EMAIL PROTECTED] wrote: > All: Sorry for jumping in abruptly on this ongoing thread. I have been > meaning to chime in ever since the discussion got started. > > I apologize in advance if I am dragging up an issue that has already been > discussed and put to rest. > > That being said, have

Re: [time-nuts] 10 MHz over optical fiber?

, 11/26/08, Bruce Griffiths <[EMAIL PROTECTED]> wrote: From: Bruce Griffiths <[EMAIL PROTECTED]> Subject: Re: [time-nuts] 10 MHz over optical fiber? To: "Discussion of precise time and frequency measurement" Date: Wednesday, November 26, 2008, 2:13 PM [EMAIL PROTECTED] wr

Re: [time-nuts] 10 MHz over optical fiber?

Hi Group; It seems to me that the increase in noise introduced with an optoelectronic device would not matter in most applications if a cleanup oscillator is added. Best Wishes; Thomas Knox NIST 4475 Whitney Place Boulder Colorado 80305 1-303-554-0307 [EMAIL PROTECTED] Quoting "Paul Boven"

Re: [time-nuts] 10 MHz over optical fiber?

[EMAIL PROTECTED] > Sent: Wednesday, November 26, 2008 2:50 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] 10 MHz over optical fiber? > > Hi Group; > It seems to me that the increase in noise introduced with an > optoelectronic device

Re: [time-nuts] 10 MHz over optical fiber?

Didier wrote: > If your concern is simply a stable frequency reference, that's true, even > though I am not sure what kind of cleanup oscillator would match the short > term stability of a maser. But also if you want to use it as a time > standard, the phase shift in the fiber has to be compensated

Re: [time-nuts] 10 MHz over optical fiber?

I think for singlemode LEAF fiber you see something around 100ps/km per degree C. Hopefully the fiber is buried and the temperature changes are more gradual. Scott Bruce Griffiths wrote: > Didier wrote: >> If your concern is simply a stable frequency reference, that's true, even >> th

Re: [time-nuts] 10 MHz over optical fiber?

Scott Mace wrote: > I think for singlemode LEAF fiber you see something around 100ps/km per > degree C. > Hopefully the fiber is buried and the temperature changes are more gradual. > > Scott > Most of it may be buried, however the ends of the fiber run may not be. There are expensive fib

Re: [time-nuts] 10 MHz over optical fiber?

From the corning leaf spec: Environmental Test Induced Attenuation Condition (dB/km) 1550 nm /1625 nm Temperature Dependence -60°C to +85°C* ? 0.05 Temperature – Humidity Cycling -10°C to +85°C* and up to 98% RH ? 0.05 Water Immersion, +23°C ? 0.05 Heat Aging, +85°C* ? 0.05 *Reference Temperature

Re: [time-nuts] 10 MHz over optical fiber?

> -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Griffiths > Sent: Wednesday, November 26, 2008 6:56 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] 10 MHz over optical fiber?

Re: [time-nuts] 10 MHz over optical fiber?

Tom Van Baak wrote: >> Yes. I know of several commecial systems. If you only need to do a short >> jump, then using fairly basic E/O-O/E equipment should work well >> enought. It all depends if you want/can to roll your own or need to buy >> a finished product (aka "buy this, and you will be fin

Re: [time-nuts] 10 MHz over optical fiber?

Tom Van Baak skrev: >> Yes. I know of several commecial systems. If you only need to do a short >> jump, then using fairly basic E/O-O/E equipment should work well >> enought. It all depends if you want/can to roll your own or need to buy >> a finished product (aka "buy this, and you will be fin

Re: [time-nuts] 10 MHz over optical fiber?

Paul Boven skrev: > Hi everyone, > > In message <[EMAIL PROTECTED]>, Marco IK1ODO -2 > writes: >> Hi all, >> >> I have to carry a 10 MHz standard frequency signal inside an EMC >> screened room via fiber optic cable. >> >> Not willing to re-invent the wheel, do something like an optical >> stand

Re: [time-nuts] 10 MHz over optical fiber?

Paul Boven skrev: > Hi Didier, everyone, > > Didier wrote: >> By the time you get the signal from the maser through 34 km of fiber optic, >> what you get at the end might be not better than a decent GPSDO... > > That's exactly what I'm trying to work out before I'll actually start > building some

Re: [time-nuts] 10 MHz over optical fiber?

On Fri, 2008-11-28 at 02:50 +0100, Magnus Danielson wrote: > Consider also things like laser gyroscopes. The stability of the fiber > is sufficient to detect even small shifts frequency due to Sagnac effect. Usually called FOGs (Fiber Optic Gyroscope), where the other "laser" type, no fibers he