Hi,
The 207x is. Auto sensing for the mains.
Groet,
Henk
Op 9 sep. 2013 om 11:52 heeft "Mark C. Stephens" het
volgende geschreven:
> After removing endless hex screws to get at the insides I find the 24V/2A PSU
> that supplies the standby voltages has what appears to be a transformer
> pri
Hi,
Have sent pdf to Ed.
Henk
Op 27 aug. 2013, om 14:49 heeft "Tom Van Baak" het
volgende geschreven:
> Hi Ed,
>
> That link has been dead for all the years I've visited their site. Given the
> format of other PDF file names in that directory the link may be a typo but
> none of the obvio
Hi Ed,
Nice story with nice pictures. Can you make full resolution pictures available
please. The 2070 and 2075 look the same, at least as far I could see. But your
picture show more of the inners than I saw when I opened mine.
Henk
Op 20 aug. 2013, om 20:51 heeft "Mike Feher" het volgende
Hi,
A possible explanation is that they use the term "high gain front end" when
they assume a controlled noise bandwidth while for a comparator the assume an
un-controlled noise bandwidth. The comparator has of coarse also a noise
bandwidth that should be controlled by the designer.
Henk
Op
Hi,
The use of double shielded cables does raise the question to what type of
connectors to use?
Regards,
Henk
Op 3 mrt. 2013 om 17:30 heeft Jim Lux het volgende
geschreven:
> On 3/3/13 8:00 AM, Kevin Rosenberg wrote:
>> On Mar 3, 2013, at 7:59 AM, John Ackermann wrote:
>>> Lesson learned
Hi Said,
Look at Dieder's site.
Groet,
Henk
Op 20 nov. 2012 om 02:36 heeft saidj...@aol.com het volgende geschreven:
> There is one calibration that can only be started by a GPIB command. I ran
> into that, my unit constantly said something like "xxx calibration
> required" or similar duri
Hello,
How to use Prologix GPIB-USB controller with Mathematica on a Mac, that is the
question. Does the Prologix have a name so that I can write: Open["Prologix
GPIB-USB"] ?
regards,
Henk
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Hi,
The 53310A is a very nice instrument for frequency and time interval
measurements. The displayed time on the screen in divided in slots, 225 or 450,
depending on measurement mode. In a slot every edge is counted but the first
edge is timed by interpolation. In the 53310A I have and the ot
Tom,
Great desing,
Henk
On 1 Apr 2010, at 9:29 PM, Tom Van Baak wrote:
I used the new google today and found that a new type
of atomic clock has been developed which promises a
revolution in timekeeping.
Typically national physics laboratories, such as NIST in
the United States, develop the
Hi,
Tektronix made two types of current probes, AC probes and Dc probes.
The AC probes go from some Hz or kHz upto Mhz or GHz. They are robust
and not so expensive. The DC probes are ac probes with an additional
hall sensor in it. The go from DC to say 100MHz. The DC probes are
expensive
Hi,
Thanks for the response, I did expect this.
It saves me the experiment.
henk
On Jan 3, 2009, at 23:33, Bruce Griffiths wrote:
> Poul-Henning Kamp wrote:
>> In message <494882EB-D714-49B4-A7E2-
>> bef04509d...@deriesp.demon.nl>, Henk ten Pi
>> erick writes:
>>
>>> Hi,
>>>
>>> An opto coupl
Hi,
An opto coupler seems good idea for an isolation amplifier but maybe
not for the phase noise.
Any experience?
regards,
henk
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Hi,
1. connect as shown on the Quick Start Signal Source.
2. Signal source ON,
3. select Frequency Modulation,
4. press Autoscale.
This should give a sine on the display.
Does this work? If yes I will make a scan of the manual.
My Quick Start Signal Source is still alive.
How about your eprom?
re
Hi,
In car radio capacitive antennas are used. The required LNA rejection
for the power line frequency is in the order of 100dB.
henk
On Aug 10, 2008, at 15:16, Alan Melia wrote:
> Hi Didier, thanks for that idea, yes they were all "pucks" all
> Garmin two
> intended for marine use and one
On May 10, 2008, at 15:07, Didier Juges wrote:
> Sorry if my answer was confusing. I did not mean to imply that the
> 5370 was
> 3 orders of magnitude more accurate than the 5335, simply that it
> attempts
> to display data with 3 orders of magnitude greater resolution (3
> orders of
> magn
Hi,
My first choice would be the HP533130A. The HP533130A is a
interpolating counter with a scope-like display. It has the
resolution you need. The resolution is determined by the time/div
setting and the vertical scale. It divides the horizontal display
time in 250 or 450 time slots, depe
On Apr 30, 2008, at 18:56, Hal Murray wrote:
>> LEDs been viable since at least the early 70's? Talk about planned
>> obsolescence...
>
> How reliable were the early LEDs? When did they start to get used
> in high
> reliability applications?
When I joined Hewlett-Packard in 1970, they made th
Hi Don,
Any comparator or slicer has a noise density and a noise bandwidth.
The noise value of this slicer is the integral of the noise density
over the noise bandwidth. The noise bandwidth is the slicer
bandwidth, not the slicer frequency. Due to the slope, thus the slew
rate, of the inpu
On Jan 8, 2008, at 12:50, Don Collie wrote:
> I`d just hang an AC millivoltmeter[or microvoltmeter] across the
> regulator`s
> output.
> I use my H/P 400H, which will give readings down to about 50uV. If
> your
> regulator produces less noise than this [say a 723, with
> 2uV], then you`ll nee
On Jan 2, 2008, at 0:06, Bruce Griffiths wrote:
>>
> Henk
>
> The circuit diagram helps a lot.
Thanks a lot for the comments on the schematic, they explain a lot.
> I will create some circuit schematics for crystal oscillators that
> control the crystal current more directly and use a common ba
; 732-886-5960
>
>
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:time-nuts-
> [EMAIL PROTECTED] On
> Behalf Of Henk ten Pierick
> Sent: Tuesday, January 01, 2008 8:03 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re:
age from V1? Is it also 12V?
The ADR455 is a 5volt reference.
> HNY -
Same to you all.
Henk
> Mike
>
>
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:time-n
On Dec 30, 2007, at 19:03, Grant Hodgson wrote:
> Henk
>
> Two things will dominate if you want such a low phase noise spec.:-
> the
> loaded Q of the oscillator circuit, and the flicker corner frequency
> of the sustaining amplifier transistor. To get a high loaded Q you
> need
> a crysta
On Dec 30, 2007, at 3:42, Bruce Griffiths wrote:
> Henk
>
> The 30dB/decade phase noise slope could be the result of the effect of
> low pass filtering a power supply or reference source that has
> significant flicker noise.
The reference used is an ADR455. I have not seen references
significa
On Dec 30, 2007, at 0:03, Bruce Griffiths wrote:
Henk ten Pierick wrote:
Hello,
Some questions on xtal oscillator phase noise.
Henk
A circuit diagram for the oscillator is required before intelligent
comment about changes can be made.
Bruce,
1. Best wishes.
2. It has taken some time
Hello,
Some questions on xtal oscillator phase noise. Attached the
measurement result of my series resonant xtal oscillator.
It is a class A, ibias 5 mA, Ixtal 1 mArms. Transistor selected for
low Rbb' 20 Ohm, Ft 100MHz. Reference voltage 5V from an ADR445,
filtered with 10uF folie cap. Pha
Hi Jon,
I have send what I have off-list.
Henk
On Nov 21, 2007, at 0:26, John Ackermann N8UR wrote:
> The UPS man left my nifty new DTS-2070C analyzer today. The unit
> looks
> like it's new in box, but it's been robbed of the manual (and SMA
> shorts
> and extenders that are supposed to
); SAEximRunCond expanded to false
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Bruce,
Great!
Henk
On Nov 8, 2007, at 22:11, Bruce Griffiths wrote:
> Henk ten Pierick wrote:
>> On Nov 6, 2007, at 22:43, Bruce Griffiths wrote:
>>
>>
>>> NIST's AC standard is currentl
); SAEximRunCond expanded to false
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On Nov 6, 2007, at 22:43, Bruce Griffiths wrote:
> NIST's AC standard is currently useful for generating frequencies
> up to
> 100kHz with 10MHz the projected useful limit for a 10Gb/s bit stream.
> With say a 1Mb/s bit stre
); SAEximRunCond expanded to false
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1. At first: thank you Greg Burnett.
2. There are some nice similarities between audio and time keeping.
As an example: the relation between jitter and what is audible is a
difficult one. There are not yet good models devel
); SAEximRunCond expanded to false
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On Oct 8, 2007, at 20:04, David McGaw wrote:
> ); SAEximRunCond expanded to false
> Errors-To: [EMAIL PROTECTED] RETRY
>
> As one who has worked in the pro digital audio field for years, I can
> tell you that sub-100 ps jitter
On Oct 6, 2007, at 18:48, Poul-Henning Kamp wrote:
> When faced with claims that picosecond jitter can be perceived by
> the human ear, my flim-flam-o-meter blows a fuse.
>
> A 1 nsec phasemodulation of a 44100 kHz clock signal will, worst
> case, come out to an noise component 87 dB below the in
On Oct 6, 2007, at 3:01, Magnus Danielson wrote:
>>
>> If the sample rate is 44.1 kHz then the adev below 1 s, even
>> down to 10 us, or jitter, or the phase noise above 1 kHz are
>> they key parameters; not long-term drift. In this case I'd take
>> a nice 10811A over a typical Rb any day. Does a
); SAEximRunCond expanded to false
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On Aug 1, 2007, at 0:51, Dr Bruce Griffiths wrote:
>>
> Henk
>
> There is no theory to show that sigma delta modulators of order higher
> than 2 are actually unconditionally stable.
Yes, but with the Gerzon-Craven theory is
); SAEximRunCond expanded to false
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On Jul 24, 2007, at 1:32, Dr Bruce Griffiths wrote:
> Perhaps a software implementation of a 1 bit oversampled DAC the 1 bit
> output of which is low pass filtered to control the EFC input is the
> closest approach to this ide
Hi Magnus,
The 5372A which we bought new years ago reference polluted by the
switching power supplies. There were more of them with different
frequencies. It showed up in the fft of measurements and also seen at
the reference output. I do not have access to that instrument anymore
and do n
Hello all,
Same question for the Vectron 224-8647-2 100MHz.
Henk ten Pierick
On Jun 19, 2007, at 12:43, Jeroen Bastemeijer wrote:
> Dear All,
>
> Can someone provide me with the pin-out of a Vectron 244-4799-2
> oscillator? It has a SMA output and a DB-9 connector for power sup
Hi Said,
For jitter measurements the bandwidth, and thus the rise time, is not
important. Only the timing which is not affected by the rise time.
The filter has to settle enough so bandwidth must be high enough. A
low pass which increases the rise time is oke. For digital scopes,
and thus
Hi Said,
We have a lot of fet probes in our lab, including Tek, hp and
Philips. Only one is useful for jitter measurements with the
Wavcrest, the hp 200MHz differential probe. I use it most of the time
single ended. It is the noise bandwidth of the probe that is of most
importance.
If rea
Hi Said,
My hp53310 shows the same artifacts if the input frequency is nearly
the reference frequency. If I use the reference as input frequency
the noise is lower. When I adjust the time/div to more than 2 times
the frame flyback time, I can see a disturbance at the fylback
interval with
On Apr 25, 2007, at 23:38, Dave Brown wrote:
> Henk
> Do any of the spurious signals show on the SA with a search antenna
> (located in your lab environment)connected instead of the PRS10?
> DaveB
No, they are not. I can see spurious if and only if the PRS10 is
powered. When I open the PRS10
Hi Poul-Henning,
1. It is not a stupid question but a very valid one.
2. I was aware of the EMI possibility and tried ferrites on the
supply and signal wires with no result.
3. I will try batteries but have to find enough of them.
4. On the spectrum analyzer, I checked the amplitude setting a
Hi,
Thank you all for the frequency plots of the PRS10. It is very
interesting to see these and find the differences.
In the mean time I have restarted my PRS10 and have seen that some
spurious signals are large at start up and reduce after that. I have
attached a screen shot of the hp8590
Hi Said,
Thanks for the picture.
I have inserted a 100MHz lowpass between the PRS10 and the Wavecrest
tot remove the spurious signals.
There is a large difference in phase noise close to the carrier as
calculated by the Wavecrest.
It is unclear to me if the spurious is normal or not. The spur
On Apr 23, 2007, at 20:13, [EMAIL PROTECTED] wrote:
>
>> Your nice picture shows a -95dBc phase noise at 10Hz.
>> The SRS spec for PRS10 is -130dBc at 10Hz. Can you explain that
>> difference of 35dBc?
>
> The X axis is labeled in exponential form by the TSC instrument, it's
> actually -95dBc/H
On Apr 22, 2007, at 23:47, [EMAIL PROTECTED] wrote:
> Hi Henk,
>
> great to hear that you got a Wavecrest DTS-2075!! That machine can
> detect
> spurs that phase noise measurements are oblivious too. Spurs cause
> nasty
> deterministic jitter of course.
That DTS2075 is at my employers lab.
rmonic; the
> harmonics they're talking about are low order).
>
> John
>
>
> Henk ten Pierick said the following on 04/22/2007 02:28 PM:
>> Hello,
>>
>> Sorry for the reply, hit the wrong button. But:
>>
>> The output spectrum of my just bought PRS10 h
Hello,
Sorry for the reply, hit the wrong button. But:
The output spectrum of my just bought PRS10 has spurious frequencies
from 580MHz in steps of 10MHz up to 680MHz. The 580MHz and 680MHz
signals just above the noise. The 630MHz amplitude 60dB down the
10MHz. Does anyone know if this a normal o
Hello,
The output spectrum of my just bought PRS10 has spurious frequencies
from 580MHz in steps of 10MHz up to 680MHz. The 580MHz and 680MHz
signals just above the noise. The 630MHz amplitude 60dB down the
10MHz. Does anyone know if this a normal output?
Henk
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