[time-nuts] Importing into EEC

Martyn Smith martyn at ptsyst.com
Fri Aug 15 04:44:58 EDT 2008


Just wanted to remind everyone it's illegal to import any electronic devices
into Europe without them having a CE mark.

I see there have been many projects like the Jackson Labs unit that have
been imported into Europe.  This is illegal.

I don't mean to knick pick, but it costs our company about $10000 to CE mark
a product.  And if we add one small option, it must be CE marked again.  To
the small manufacturer, this kills us and doesn't allow us to offer low
prices.

Steve

Best Regards

Martyn

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----- Original Message ----- 
From: <time-nuts-request at febo.com>
To: <time-nuts at febo.com>
Sent: Friday, August 15, 2008 1:17 AM
Subject: time-nuts Digest, Vol 49, Issue 32


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> When replying, please edit your Subject line so it is more specific
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> Today's Topics:
>
>   1. New 10mhz Distribution Amplifier (Doug Millar)
>   2. Re: New 10mhz Distribution Amplifier (Bruce Griffiths)
>   3. Datum FTS-4040A Cesium standard (S. Nestra)
>   4. Re: New 10mhz Distribution Amplifier (Rick Karlquist)
>   5. Re: New 10mhz Distribution Amplifier (Bruce Griffiths)
>   6. Re: New 10mhz Distribution Amplifier (Rick Karlquist)
>   7. Re: I want a good micro-controller (Robert Vassar)
>   8. Re: I want a good micro-controller (Bruce Griffiths)
>   9. Re: New 10mhz Distribution Amplifier (Magnus Danielson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 14 Aug 2008 10:26:01 -0700
> From: Doug Millar <dougnhelen at moonlink.net>
> Subject: [time-nuts] New 10mhz Distribution Amplifier
> To: <time-nuts at febo.com>
> Message-ID: <0K5L00L28PRHNVZ4 at vms173005.mailsrvcs.net>
> Content-Type: text/plain; charset=us-ascii; format=flowed
>
>
> Hi,
> A new 10mhz distribution amplifier is available at amateur prices.
> Jerry N7EME is producing them. His website is at
> http://jwmeng.com/model_RDA-6.html
> Doug K6JEY
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 15 Aug 2008 09:52:29 +1200
> From: Bruce Griffiths <bruce.griffiths at xtra.co.nz>
> Subject: Re: [time-nuts] New 10mhz Distribution Amplifier
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Message-ID: <48A4A91D.3050806 at xtra.co.nz>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Doug Millar wrote:
>> Hi,
>> A new 10mhz distribution amplifier is available at amateur prices.
>> Jerry N7EME is producing them. His website is at
>> http://jwmeng.com/model_RDA-6.html
>> Doug K6JEY
>>
>>
>>
> There's  a few specifications missing:
>
> 1) input impedance and return loss.
>
> 2) output impedance and return loss
>
> 3) phase noise
>
> These are essential if one is to make a rational decision on the
> suitability of the distribution amplifier.
>
> The outputs and inputs appear to share a common ground.
> This would preclude its use in some setups without external means of
> providing the required isolation.
>
> The other question is does the device use AGC to set the output level?
> If it does the phase noise floor will almost inevitably be relatively
> high compared to the state of the art.
>
> Bruce
>
>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 15 Aug 2008 00:24:55 +0200
> From: "S. Nestra" <pe1rks at xs4all.nl>
> Subject: [time-nuts] Datum FTS-4040A Cesium standard
> To: time-nuts at febo.com
> Message-ID: <48A4B0B7.8050206 at xs4all.nl>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi,
>
> I have a problem with a FTS-4040A standard, the LED major fault stays on 
> forever.
> When I use the monitor program from Symmetricom I see that my OCXO stays
> cold and I have no Cesium oven voltage. The OCXO does feel warm so this
> one is warming up, I don't know if the cesium oven is warming up since I
> can't feel any heat from the CBT.
> I also don't see any current from the ION pump.
> After opening the unit I found a burnt resistor R1 on one board, I don't
> know what it's function is but I would like to know the value of this
> resistor so I can replace it.
> So here is my question: does anybody have any technical documentation
> for this unit and is it possible for someone to lookup this resistor in
> his standard so I know the value( pictures included for position).
> I think I have a power supply problem.
> I welcome all suggestions.
>
> Greets,
>
> Stijn Nestra
>
> Link for the pictures and the list of
> faults: http://82.95.123.226/fts4040a/
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Thu, 14 Aug 2008 15:37:11 -0700 (PDT)
> From: "Rick Karlquist" <richard at karlquist.com>
> Subject: Re: [time-nuts] New 10mhz Distribution Amplifier
> To: "Discussion of precise time and frequency measurement"
> <time-nuts at febo.com>
> Message-ID:
> <16702.192.25.142.225.1218753431.squirrel at webmail.sonic.net>
> Content-Type: text/plain;charset=iso-8859-1
>
> Additional specs to consider:
>
> The return loss should be low for 10 MHz and the first 8 harmonics.
> The harmonic distortion should be low.
> The isolation between outputs should be high.
> The phase drift vs temperature should be low.
> The short term stability at 1 second should be good.
> The magnetic field susceptibility should be low.
> Line sidebands should be low.
>
> Compare, for example, the HP5087, a so-so design, to the
> output amplifier design in the 5071A cesium, as documented
> in my FCS paper in 1992.  Huge difference in specs.  The
> 5071A has 120 dB isolation between outputs.
>
> Rick Karlquist N6RK
>
>
> Bruce Griffiths wrote:
>> Doug Millar wrote:
>>> Hi,
>>> A new 10mhz distribution amplifier is available at amateur prices.
>>> Jerry N7EME is producing them. His website is at
>>> http://jwmeng.com/model_RDA-6.html
>>> Doug K6JEY
>>>
>>>
>>>
>> There's  a few specifications missing:
>>
>> 1) input impedance and return loss.
>>
>> 2) output impedance and return loss
>>
>> 3) phase noise
>>
>> These are essential if one is to make a rational decision on the
>> suitability of the distribution amplifier.
>>
>> The outputs and inputs appear to share a common ground.
>> This would preclude its use in some setups without external means of
>> providing the required isolation.
>>
>> The other question is does the device use AGC to set the output level?
>> If it does the phase noise floor will almost inevitably be relatively
>> high compared to the state of the art.
>>
>> Bruce
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>>
>
>
>
>
>
> ------------------------------
>
> Message: 5
> Date: Fri, 15 Aug 2008 10:46:07 +1200
> From: Bruce Griffiths <bruce.griffiths at xtra.co.nz>
> Subject: Re: [time-nuts] New 10mhz Distribution Amplifier
> To: richard at karlquist.com, Discussion of precise time and frequency
> measurement <time-nuts at febo.com>
> Message-ID: <48A4B5AF.4030707 at xtra.co.nz>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Rick Karlquist wrote:
>> Additional specs to consider:
>>
>> The return loss should be low for 10 MHz and the first 8 harmonics.
>> The harmonic distortion should be low.
>> The isolation between outputs should be high.
>> The phase drift vs temperature should be low.
>> The short term stability at 1 second should be good.
>> The magnetic field susceptibility should be low.
>> Line sidebands should be low.
>>
>> Compare, for example, the HP5087, a so-so design, to the
>> output amplifier design in the 5071A cesium, as documented
>> in my FCS paper in 1992.  Huge difference in specs.  The
>> 5071A has 120 dB isolation between outputs.
>>
>> Rick Karlquist N6RK
>>
>>
>>
> Rick
>
> Did you mean a high return loss or equivalently low reflection 
> coefficient?
>
> The layout of the board in the picture is perhaps preliminary the input
> signal track to 3 of the output sections is a little too close to
> another track.
>
> Its hard to tell from the low res image but have thick film resistors
> been used?
> These can have excessive flicker noise thus increasing the close in
> phase noise above that possible with thin film resistors.
>
> Bruce
>
>
>
> ------------------------------
>
> Message: 6
> Date: Thu, 14 Aug 2008 16:13:58 -0700 (PDT)
> From: "Rick Karlquist" <richard at karlquist.com>
> Subject: Re: [time-nuts] New 10mhz Distribution Amplifier
> To: "Bruce Griffiths" <bruce.griffiths at xtra.co.nz>
> Cc: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Message-ID:
> <7609.192.25.142.225.1218755638.squirrel at webmail.sonic.net>
>Content-Type: text/plain;charset=iso-8859-1
>
> I should have said the return loss should be "high" or "good" :-)
>
> Bruce Griffiths wrote:
>> Rick Karlquist wrote:
>>> Additional specs to consider:
>>>
>>> The return loss should be low for 10 MHz and the first 8 harmonics.
>>> The harmonic distortion should be low.
>>> The isolation between outputs should be high.
>>> The phase drift vs temperature should be low.
>>> The short term stability at 1 second should be good.
>>> The magnetic field susceptibility should be low.
>>> Line sidebands should be low.
>>>
>>> Compare, for example, the HP5087, a so-so design, to the
>>> output amplifier design in the 5071A cesium, as documented
>>> in my FCS paper in 1992.  Huge difference in specs.  The
>>> 5071A has 120 dB isolation between outputs.
>>>
>>> Rick Karlquist N6RK
>>>
>>>
>>>
>> Rick
>>
>> Did you mean a high return loss or equivalently low reflection
>> coefficient?
>>
>> The layout of the board in the picture is perhaps preliminary the input
>> signal track to 3 of the output sections is a little too close to
>> another track.
>>
>> Its hard to tell from the low res image but have thick film resistors
>> been used?
>> These can have excessive flicker noise thus increasing the close in
>> phase noise above that possible with thin film resistors.
>>
>> Bruce
>>
>>
>
>
>
>
>
> ------------------------------
>
> Message: 7
> Date: Thu, 14 Aug 2008 18:24:46 -0500
> From: Robert Vassar <rvassar at rob-vassar.com>
> Subject: Re: [time-nuts] I want a good micro-controller
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Message-ID: <B8B0DEA1-C95B-4E11-BEA9-7A8BD33193B5 at rob-vassar.com>
> Content-Type: text/plain; charset=WINDOWS-1252; delsp=yes;
> format=flowed
>
>
>
>
> Good grief!  That's not a microcontroller!  :-)
>
>
>
> I like the MCS-51 family, but they're kind of goofy to program in C,
> and 8-bit.  Upside, lots of vendors & variants, including the really
> nice SiLabs mixed signal chips made here in Austin.  AVR is much
> nicer to code in C, and has great tool support, but they're single
> source, and I have read that Atmel is not always completely
> forthcoming in their errata.
>
>
> Arm... If you need something that can run Linux.... But why not just
> go for a Soekris board at that point?  :-)
>
>
> Rob
> KC6OOM/5
>
>
> On Aug 13, 2008, at 7:06 PM, Bob Paddock wrote:
>
>>> any ARM7 outperforms the best PIC in price and performance :)
>>
>> http://beagleboard.org/
>>
>> Get them from DigiKey, $149.
>>
>> http://dkc1.digikey.com/us/mkt/beagleboard.html
>>
>> "The USB-powered Beagle Board is a low-cost, fan-less single board
>>
>> computer utilizing Texas Instruments' OMAP3530 [ARM] application
>> processor
>>
>> that unleashes laptop-like performance and
>>
>> expansion without the bulk, expense, or noise of typical desktop
>> machines.
>>
>> Beagle Board is based on an OMAP3530 application processor featuring
>> an ARM(R) Cortex?-A8 running at up to 600MHz and delivering over 1,200
>> Dhrystone MIPS of performance via superscalar operation with highly
>> accurate branch prediction and 256KB of L2 cache.  Focal to Beagle
>> Board experience is the high-speed USB 2.0 on-the-go (OTG) port that
>> can be utilized to provide power to the board or to deliver highly
>> flexible expansion.  Standard PC peripherals can be connected to
>> Beagle Board using the USB with a mini-A to standard-A cable adapter,
>> DVI-D using an HDMI to DVI-D adapter, or through the MMC/SD/SDIO
>> connector enabling a complete desktop experience."
>>
>>
>> -- 
>> http://www.wearablesmartsensors.com/
>> http://www.softwaresafety.net/
>> http://www.designer-iii.com/
>> http://www.unusualresearch.com/
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/
>> time-nuts
>> and follow the instructions there.
>
>
>
>
> ------------------------------
>
> Message: 8
> Date: Fri, 15 Aug 2008 11:44:50 +1200
> From: Bruce Griffiths <bruce.griffiths at xtra.co.nz>
> Subject: Re: [time-nuts] I want a good micro-controller
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Message-ID: <48A4C372.7090104 at xtra.co.nz>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> Robert Vassar wrote:
>>
>> Good grief!  That's not a microcontroller!  :-)
>>
>>
>>
>> I like the MCS-51 family, but they're kind of goofy to program in C,
>> and 8-bit.  Upside, lots of vendors & variants, including the really
>> nice SiLabs mixed signal chips made here in Austin.  AVR is much
>> nicer to code in C, and has great tool support, but they're single
>> source, and I have read that Atmel is not always completely
>> forthcoming in their errata.
>>
>>
>> Arm... If you need something that can run Linux.... But why not just
>> go for a Soekris board at that point?  :-)
>>
>>
>> Rob
>> KC6OOM/5
>>
>>
> You can do substantially better by using a suitable FPGA board.
> One can create a hardware timestamp counter with multiple capture
> registers that wont wrap around in less than a week or more together
> with whatever simple processors required for decoding GPS receiver data.
> A simple 16 x2 character LCD display or similar is easily added for
> field readout. Keyboards and pushbuttons together with serial ports USB
> ports etc are often provided so communications with A PC for data
> retrieval /storage is readily possible.
>
> Bruce
>
>
>
> ------------------------------
>
> Message: 9
> Date: Fri, 15 Aug 2008 02:17:21 +0200
> From: Magnus Danielson <magnus at rubidium.dyndns.org>
> Subject: Re: [time-nuts] New 10mhz Distribution Amplifier
> To: richard at karlquist.com, Discussion of precise time and frequency
> measurement <time-nuts at febo.com>
> Message-ID: <48A4CB11.3080004 at rubidium.dyndns.org>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Rick Karlquist wrote:
>> I should have said the return loss should be "high" or "good" :-)
>
> "high" works, "good" depends on the application. :-)
>
> I would look at the return loss curve in general.
>
> Cheers,
> Magnus
>
>
>
> ------------------------------
>
> _______________________________________________
> time-nuts mailing list
> time-nuts at febo.com
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>
> End of time-nuts Digest, Vol 49, Issue 32
> *****************************************
> 





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